Miniature Relays
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G u i d e●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

Introduction of EM Devices Corporation
Since NEC industrialized telephone relays in Japan more than a half century ago, manytechnological innovations have taken place in its electromechanical devices (E.M. devices).
NECʼs relays were designed and manufactured always on the basis of the newest technologythat the company develops. Their high reliability and advanced features ensure the highreliability and high performance.
NEC divided and transferred its business of the manufacturing and sale of relays to Tokin, as ofApril 1, 2002. Then Tokin Corporation changed its corporate name to “NEC TOKIN Corporation.”
Then, on April 14, 2017, NEC TOKIN Corporation split off the EM Devices Division and createda new company, "EM Devices Corporation".

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

Miniature Relay

Introduction of NEXEM’s miniature relays

NEXEM is EM Devices' company brand. NEXEM miniature relays can be classified into two
types. Signal relays that are mainly used by communication equipment manufacturers in theworld, and power relays that satisfy the needs of automobile electronic systems.

FeatureMiniature signal relay

・Compact and lightweight for dense mounting
・Low power consumption
・Plastic-sealed package
・High withstand voltage
・Surface mounting product lineup

Miniature power relay

・High power switching capability・Compact and lightweight with twin relay structure
・Flux tight housing
・Washable with plastic-sealed package
・Semicustom-made-product available for various applications
・Reflow soldering type available
Note・The description in this catalog is representative characteristics and is not a guaranteed value. And the description inthis catalog is subject to change without notice.
When an order is placed, please request shipping specification which can confirm still more detailed specification. In
case there is a discrepancy between this catalog and shipping specification, the later shall prevail.
・The product described in this catalog is subject to change without notice. When adaption is considered or an order isplaced, please confirm the newest information.
・Before using the product in this catalog, please read “NOTES ON CORRECT USE" in this catalog and other safety
precautions.

3●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

Selector Chart
・GroupMiniature Relay-Signal

UA2

UB2

UC2

UD2

・Super-compact size
・Dual-inline leads(Small mounting space)・2500V surge(2 × 10μs*)
・Latch type available
・Low power consumption
type available

・Super-compact size
・Surface mount(Small mounting space)・2500V surge(2 × 10μs*)
・Latch type available
・Low power consumption
type available

・Super-compact size
・Dual-inline leads(Low profile type)・2500V surge(2 × 10μs*)
・Latch type available
・Low power consumption
type available

・Super-compact size
・Surface mount(Low profile type)・2500V surge(2 × 10μs*)
・Latch type available
・Low power consumption
type available

・Type of Relay

・Features・Contact Form

2c・Contact Material(standard)

Silver alloy with gold alloy overlay
30W/37.5 VA・Contact Rating(Resistive)(switching)

3A
2A

1.0A

1A
・Coil Voltage

3,4.5,5,9,12,(24) VDC・Nominal OperatePower

100 to 230mW (latch type 100 to 120 mW)

・Must Operate Voltage

75%(Low power consumption type of UC2/UD2=80%)

・Must Release Voltage

10%・Operate Time (typ.)(Excluding bounce)

2ms

・Release Time (typ.)(Excluding bounce
Without Diode)

1ms

・Running
Specifications
・Withstand
Voltage1 × 105 (30 VDC, 1 A at 20℃ , 1Hz)
1 × 105 (125 VAC, 0.3A at 20℃ , 1Hz)

Load
Non-load

10 × 106

Between open
contacts
Between adjacentcontacts
Between contacts
and coil

1000VAC
1000VAC
1500VAC・Surge Withstand
Voltage

1500V(FCC), 2500 V(2 × 10μs, coil to contacts)

・Safety Standard

UL, CSA, TÜV・Option・Height (mm)・Mounting Space (mm2)・Page・Sales status

latch type
8.3

8.8

5.6

5.45

6.0 × 10.9

7.7 × 10.9

6.8 × 10.9

8.7 × 10.9

11 to 12, 15 to 17

13 to 1718, 19, 22 to 24

20 to 24

ActiveActiveActiveActive4●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

Selector Chart
・GroupMiniature Relay-Signal

EA2

EB2

EC2

EE2
・Type of Relay

・Low power consumption
・Low magnetic
interference
・1500V FCC surge
1000VAC FCC・Compact, light weight・Latch type available

・Surface mount・Low power consumption
・Low magnetic
interference
・1500V FCC surge
1000VAC FCC・Compact, light weight・Latch type available

・Low power consumption
・Dual-inline leads(Small mounting space)・2500 V surge(2 × 10μs*)
coil to contacts
・Latch type available
・High-insulation is lineup.

・Low power consumption
・Surface mount(Reduced mounting space)・2500 V surge(2 × 10μs*)
coil to contacts
・Latch type available
・High-insulation, highvoltage type is lineup.

・Features

2c・Contact Form

Silver alloy with gold alloy overlay

・Contact Material(standard)

30W/62.5 VA

60W/125 VA(UL/CSA Rating)

3A

2.0A

・Contact Rating(Resistive)(switching)

2A

1.0A

1A
3,4.5,5,12,24 VDC

・Coil Voltage

3,4.5,5,9,12,24 VDC

・Nominal OperatePower

140mW (latch type 100 〜 200 mW)
75%

・Must Operate Voltage

10%・Must Release Voltage

2ms

・Operate Time (typ.)(Excluding bounce)

1ms

・Release Time (typ.)(Excluding bounce
Without Diode)1 × 106 (50 VDC, 0.1 A at 85℃ ,5Hz)
1 × 106 (10 VDC, 10 mA at 85℃ ,2Hz)Load

10 × 10Non-load

1000VAC(1500VAC: NK type of EE2 at make contact)

Between open
contacts
Between adjacentcontacts
Between contacts
and coil

6

1000VAC・Running
Specifications
・Withstand
Voltage

1000VAC

1500VAC or 1000VAC**

1500V FCC

1500V (FCC), 2500V***(2 × 10ms, coil to contacts)

・Surge Withstand
Voltage

UL, CSA, TÜV・Safety Standard

UL, CSA・Optionlatch type・Height (mm)

5.4

7.5

9.4

10.0

9.2 × 14.2

11.7(9.3) × 14.3

7.5 × 15.0

9.7 × 15.0

・Mounting Space (mm2)25, 26, 29 to 31

27 to 31

32 to 34, 38 to 41

35 to 41

・Page

ActiveActiveActiveActive・Sales status* 2μs of rise time and 10μs of decay time to half crest.
** for double coil latch type*** 1500V for double coil latch type
5

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

Selector Chart
・GroupMiniature Relay-Signal

ED2

EF2

・Type of Relay

・Ultra-low power consumption
・Dual-inline leads (small mounting space)・2500 V surge (2 × 10μs*)coil to contacts

・Ultra-low power consumption
・Surface mount (reduced mounting space)・2500V surge (2 × 10μs*)coil to contacts

・Features・Contact Form

2c・Contact Material(standard)

Silver alloy with gold alloy overlay
30W/62.5 VA・Contact Rating(Resistive)(switching)

3A
2A

1.0A

1A
・Coil Voltage

1.5,3,4.5,5,9,12,24 VDC

・Nominal OperatePower

30 to 70mW

・Must Operate Voltage

75%・Must Release Voltage

10%・Operate Time (typ.)(Excluding bounce)

3ms

・Release Time (typ.)(Excluding bounce
Without Diode)2ms

・Running
Specifications
・Withstand
Voltage1 × 106 (50 VDC, 0.1 A at 70℃ ,5Hz)
1 × 106 (10 VDC, 10 mA at 70℃ ,2Hz)

Load
Non-load

10 × 106

Between open
contacts
Between adjacentcontacts
Between contacts
and coil

1000VAC
1000VAC
1500VAC・Surge Withstand
Voltage

1500V(FCC), 2500 V(2 × 10μs, coil to contacts)

・Safety Standard

UL, CSA, TÜV・Option・Height (mm)・Mounting Space (mm2)・Page・Sales status

――
9.4

10.0

7.5 × 15.0

9.5 × 15.0

42, 43, 46 to 48

44 to 48

Active* 2μs of rise time and 10μs of decay time to half crest.

Active#FCC surge between coil and contacts and between adjacent contacts

6●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

Selector Chart
・GroupMiniature Relay-Power

EU2

EX2

EX1
・Type of Relay

・Ultra low profile SMD twin relay for
motor reversible control
・Light weight・PC board mounting
・Reflow soldering available
・77% lower mounting height thanET2・60% lower mounting height thanEX2・Ultra miniature twin relay for motor
reversible control
・Light weight・Small footprint
・Small mounting area
・PC board mounting
・Flux tight housing
・75% less relay volume than ET2・60% less relay space than ET2

1c × 2

1c × 2・Ultra miniature single relay for
motor control
・Small footprint
・Small mounting area
・Light weight・PC board mounting
・Flux tight housing
・65% less relay volume than ET1
・50% less relay space than ET11c・Features・Contact Form・Contact Material(standard)

Silver oxide complex alloy

30A

25A(14VDC)

25A
20A
15A
10A

・Contact Rating(Resistive)(switching)

5A
1A・Coil Voltage

12 VDC
960mW

・Nominal Operate
Power

900mW

・Must Operate Voltage

6.5VDC
0.6 VDC・Must Release Voltage

0.9 VDC・Operate Time (typ.)(Excluding bounce)

Approx. 2.5ms

・Release Time (typ.)(Excluding bounce)

Approx. 3ms
100 × 103
motor load 14VDC 25A / 5ALoad

1 × 10Non-load

500VAC

Between open
contacts
Between adjacentcontacts
Between contacts
and coil

6――
500VAC・Running
Specifications
・Withstand
Voltage――・Surge Withstand
Voltage――・Safety Standard――
8.5

・Option・Height (mm)14.2

14.5(12.2) × 21

12.6 × 14.1

8.0 × 12.6

・Mounting Space (mm2)

49 to 50

51 to 52

53to 54

・Page

ActiveActiveActive・Sales status

7●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

Selector Chart
・GroupMiniature Relay-Power

ET2

ET1

・Type of Relay

・Miniature twin relay for motor reversible control
・Low profile
・Light weight・PC board mounting
・Flux tight housing
・50% less relay volume than EP2
・50% less relay weight than EP2*ET2F:High heat resistivity

・Features・Contact Form・Miniature single relay
・Motor, heater & solenoid control
・Low profile
・Light weight・PC board mounting
・Flux tight housing
・45% less relay volume than EP1
・56% less relay weight than EP1*ET1F:High heat resistivity

1c × 2

・Contact Material(standard)

1c
Silver oxide complex alloy

30A
25A
・Contact Rating(Resistive)(switching)

20A(14VDC)

20A
15A
10A
5A
1A

・Coil Voltage

12 VDC・Nominal Operate
Power

640mW

・Must Operate Voltage

6.5VDC・Must Release Voltage

0.9 VDC・Operate Time (typ.)(Excluding bounce)

Approx. 2.5ms

・Release Time (typ.)(Excluding bounce
Without Diode)Approx. 3ms

・Running
Specifications
・Withstand
Voltage

100 × 103
motor load 14VDC 20A / 3A

Load
Non-load

1 × 106

Between open
contacts
Between adjacentcontacts
Between contacts
and coil

500VAC――
500VAC・Surge Withstand
Voltage――・Safety Standard――

・Option――・Height (mm)11.0
13.3 × 22.5

13.3 × 14.5

・Page

55 to 56

57 to 58

・Sales status

ActiveActive・Mounting Space (mm2)8●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

Selector Chart
・GroupMiniature Relay-Power

EP2

EP1

EP1K
・Type of Relay

・Twin relay for motor reversible
control・PC board mounting
・Flux tight housing
・Symmetrical structure*EP2F:High heat resistivity

・Single relay
・For motor control
・PC board mounting
・Flux tight housing*EP1F:High heat resistivity

1c × 2・Large capacity single relay for
motor, heater & solenoid control
・High heat resistance・PC board mounting
・Flux tight housing
・Through-hole reflow soldering
available
・About 10A larger current than EP11c1c・Features・Contact Form・Contact Material(standard)

Silver oxide complex alloy

30A

25A(14VDC)

25A
20A
15A
10A

・Contact Rating(Resistive)(switching)

5A
1A
12 VDC・Coil Voltage

640mW

・Nominal Operate
Power

6.5VDC・Must Operate Voltage

0.9 VDC・Must Release Voltage

Approx. 5ms

・Operate Time (typ.)(Excluding bounce)

Approx. 2ms

・Release Time (typ.)(Excluding bounce
Without Diode)100 × 103
motor load 14VDC, 25A / 5ALoad

1 × 10Non-load

500VAC

Between open
contacts
Between adjacentcontacts
Between contacts
and coil

6――
500VAC――・Safety Standard――

16.5
59 to 61

16.7 × 15.1
62 to 64
Non-promotion*1*1・Option
17.5

16.7 × 24.3

・Withstand
Voltage・Surge Withstand
Voltage――

Separate type・Running
Specifications

・Height (mm)・Mounting Space (mm2)

65 to 66

・Page
・Sales status

Now, this product s are corresponding only to specific customers.

9●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

Selector Chart
・GroupMiniature Relay-Power

EM1

EL1

・Type of Relay

・Features・Contact Form・Large capacity single relay for lamp, condenser & motor
control・High heat resistance・PC board mounting
・Flux tight housing
・Through-hole reflow soldering available
・The smallest 40A class relay

・Large capacity single relay for motor & solenoidal coil・High heat resistance・PC board mounting
・Flux tight housing
・Through-hole reflow soldering available
・The smallest 40A class relay

1u

1c・Contact Material(standard)

Silver oxide complex alloy
40A(14VDC)

35A
30A
・Contact Rating(Resistive)(switching)

25A
20A
15A
10A
5A
1A

・Coil Voltage

12 VDC・Nominal Operate
Power

640mW

・Must Operate Voltage

6.5VDC・Must Release Voltage

0.9VDC・Operate Time (typ.)(Excluding bounce)

Approx. 4ms

・Release Time (typ.)(Excluding bounce
Without Diode)Approx. 1ms

・Running
Specifications
・Withstand
Voltage

100 × 103 resistive load, 40A

Load
Non-load

1 × 106

Between open
contacts
Between adjacentcontacts
Between contacts
and coil

500VAC――
500VAC・Surge Withstand
Voltage――・Safety Standard――

・Option・Height (mm)

――
16.8

17.8
12.9 × 14.9

・Mounting Space (mm2)・Page

67 to 68

69 to 70

・Sales status

ActiveActive10●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UA2 Series

NEXEMʼs UA2 relay is a new generation Miniature Signal Relay of super-compact size and slim-package.

■ FEATURES

・Small mounting size of slim package for dense mounting.
・Telcordia (2500 V) and FCC (1500 V) surge capability.
・IEC60950 / UL1950 / EN60950 spacing and high breakdown voltage.
(Basic insulation class on 200 V working voltage)
・Power consumption 140mW, Low power consumption 100mW type is available
・UL recognized (E73266), CSA certified (LR46266), TÜV certified (R2050596)■ SPECIFICATIONSContact Form

2 Form C

Contact Material

Contact Ratings

Silver alloy with gold alloy overlay
Maximum Switching Power

30 W, 37.5 VA

Maximum Switching Voltage

220 VDC, 250 VAC

Maximum Switching Current

1A

Maximum Carrying Current

1A
10 mVDC, 10μA*1

Minimum Contact Ratings
Initial Contact ResistanceNominal Operating Power

100 mΩ max. (Initial)
Non-latch type

140 mW (1.5 to 12 V), 230 mW (24 V)

Single coil latch type

100 mW (1.5 to 12 V)

Operate Time (Excluding bounce)

Approx. 2 ms

Release Time (Excluding bounce)

Approx. 1 ms

Insulation Resistance1000 MΩ at 500 VDC
Between open contacts

Withstand Voltage

100 mW (low power consumption type)

Between adjacent contacts
Between coil to contacts

1000 VAC (for one minute)1500 V surge (10 × 160μs*2)
1500 VAC (for one minute)2500 V surge (2 × 10μs*3)

Shock Resistance

735 m/s2 (misoperation)
980 m/s2 (destructive failure)

Vibration Resistance

10 to 55 Hz, double amplitude 3 mm (misoperation)
10 to 55 Hz, double amplitude 5 mm (destructive failure)

Ambient Temperature− 40 to ＋ 85˚C

Coil Temperature Rise
Running Specifications
Weight18 degrees at nominal coil voltage (140 mW)
Non-load

5 × 107 *4 operations (Non-latch type)Load

125 VAC, 0.3 A (resistive), 1 × 105 operations at 20˚C, 1 Hz

30 VDC, 1 A (resistive), 1 × 105 operations at 20˚C, 1 Hz
Approx. 1 g*1 This value is a reference value in the resistive load.
Minimum capacity changes depending on switching frequency and environment temperature and the load.
*2 Rise time : 10μs, decay time to half crest : 160μs*3 Rise time : 2μs, decay time to half crest : 10μs
*4 This shows a number of operation where it can be runnin by which a fatal defect is not caused, and a number of operation by whicha steady characteristic is maintained is 1 × 107 operations.

11●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UA2 Series■ PART NUMBER SYSTEM■ SAFETY STANDARD AND RATING

UA2-3SNUUL Recognized(UL508)*File No. E73266

OptionNU : Standard
NJ : Trimmed lead type
NE : Low power consumption type

CSA Certified(CSA C22.2 No14) ＋File No. LR46266

30 VDC, 1 A(Resistive)
110 VDC, 0.3 A (Resistive)
125 VAC, 0.3 A (Resistive)

Latch type
Nil : Non-latch type
S : Single coil latch type* Spacing : UL840＋
Spacing : CSA std950

Nominal coil voltage
A numerical value of coil voltage(See part numbers)

TÜV Certified(EN61810)
No. R 2050596

Series name

Creepage and clearance of coil to contact is over than 2 mm.
(According to EN60950)
Basic insulation class■ COIL SPECIFICATIONS・Non-latch Typeat 20℃

Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

3

64.3

2.25

0.3

140

4.5

145

3.38

0.45

140

5

178

3.75

0.5

140

9

579

6.75

0.9

140

12

1028

9.0

1.2

140

24

2504

18.0

2.4

230

Coil Resistance(Ω) ± 10%Set Voltage*(VDC)

Reset Voltage*(VDC)

Nominal Operating Power(mW)・Single Coil Latch Type
Nominal Coil Voltage(VDC)

at 20℃

3

90

2.25

2.25

100

4.5

202.5

3.38

3.38

100

5

250

3.75

3.75

100

9

810

6.75

6.75

100

12

1440

9.0

9.0

100

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power(mW)

・Non-latch Low Power Consumption Type
Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%at 20℃

3

90

2.25

0.3

100

4.5

202.5

3.38

0.45

100

5

250

3.75

0.5

100

* Test by pulse voltage

12●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UB2 Series

NEXEM's UB2 relay is a new generation Miniature Signal Relay of super-compact size and slim-package for surface
mounting.

■ FEATURES

・Small mounting size of slim package for dense mounting.
・Telcordia (2500 V) and FCC (1500 V) surge capability.
・IEC60950 / UL1950 / EN60950 spacing and high breakdown voltage.
(Basic insulation class on 200 V working voltage)
・Power consumption 140 mW, Low power consumption 100 mW type is available.
・UL recognized (E73266), CSA certified (LR46266), TÜV certified (R2050596)
・Tube or embossed tape packaging.

■ SPECIFICATIONSContact Form

2 Form C

Contact Material

Contact Ratings

Silver alloy with gold alloy overlay
Maximum Switching Power

30 W, 37.5 VA

Maximum Switching Voltage

220 VDC, 250 VAC

Maximum Switching Current

1A

Maximum Carrying Current

1A
10 mVDC, 10μA*1

Minimum Contact Ratings
Initial Contact ResistanceNominal Operating Power

100 mΩ max. (Initial)
Non-latch type

140 mW (1.5 to 12 V), 230 mW (24 V)

Single coil latch type

100 mW (1.5 to 12 V)

Operate Time (Excluding bounce)

Approx. 2 ms

Release Time (Excluding bounce)

Approx. 1 ms

Insulation Resistance1000 MΩ at 500 VDC
Between open contacts

Withstand Voltage

100 mW (low power consumption type)

Between adjacent contacts
Between coil to contacts

1000 VAC (for one minute)1500 V surge (10 × 160μs*2)
1500 VAC (for one minute)2500 V surge (2 × 10μs*3)

Shock Resistance

735 m/s2 (misoperation)
980 m/s2 (destructive failure)

Vibration Resistance

10 to 55 Hz, double amplitude 3 mm (misoperation)
10 to 55 Hz, double amplitude 5 mm (destructive failure)

Ambient Temperature− 40 to ＋ 85˚C

Coil Temperature Rise

18 degrees at nominal coil voltage (140 mW)
Non-load

Running Specifications
WeightLoad

5 × 107 *4 operations (Non-latch type)
30 VDC, 1 A (resistive), 1 × 105 operations at 20˚C, 1 Hz
125 VAC, 0.3 A (resistive), 1 × 105 operations at 20˚C, 1 Hz
Approx. 1 g*1 This value is a reference value in the resistive load.
Minimum capacity changes depending on switching frequency and environment temperature and the load.
*2 Rise time : 10μs, decay time to half crest : 160μs*3 Rise time : 2μs, decay time to half crest : 10μs
*4 This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of operation by whicha steady characteristic is maintained is 1 × 107 operations.

13●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UB2 Series■ PART NUMBER SYSTEM■ SAFETY STANDARD AND RATING

UB2-3SNU - L

UL Recognized(UL508)*File No. E73266

Packing
Nil : Tube
L : Embossed carrying tape of L type
OptionNU : Standard
NUN : Minimum footprint type
NE : Low power consumption type
NEN : Low power consumption type with minimum footprint

CSA Certificated(CSA C22.2 No14) ＋File No. LR46266

30 VDC, 1 A(Resistive)
110 VDC, 0.3 A (Resistive)
125 VAC, 0.3 A (Resistive)* Spacing : UL840＋
Spacing : CSA std950

TÜV Certified(EN61810)

Latch type
Nil : Non-latch type
S : Single coil latch type

No. R 2050596
Creepage and clearance of coil to contact is over than 2 mm.
(According to EN60950)

Nominal coil voltage
A numerical value of coil voltage(See part numbers)

Basic insulation class

Series name

■ COIL SPECIFICATIONS・Non-latch Typeat 20℃

Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

3

64.3

2.25

0.3

140

4.5

145

3.38

0.45

140

5

178

3.75

0.5

140

9

579

6.75

0.9

140

12

1028

9.0

1.2

140

24

2504

18.0

2.4

230

Coil Resistance(Ω) ± 10%Set Voltage*(VDC)

Reset Voltage*(VDC)

Nominal Operating Power(mW)・Single Coil Latch Type
Nominal Coil Voltage(VDC)

at 20℃

3

90

2.25

2.25

100

4.5

202.5

3.38

3.38

100

5

250

3.75

3.75

100

9

810

6.75

6.75

100

12

1440

9.0

9.0

100

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power(mW)

・Non-latch Low Power Consumption Type
Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%at 20℃

3

90

2.25

0.3

100

4.5

202.5

3.38

0.45

100

5

250

3.75

0.5

100

* Test by pulse voltage

14●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UA2/UB2 Series■ DIMENSIONS mm(inch)
10.6 [0.417]

mm [inch]

UB2

10.6[0.417]

5.7[0.224]*9.0[0.354] max.
8.8[0.346] max.

5.7 [0.224]

(1.5)

3.2

(1.5)

2.2 2.2

3.4[0.134]*2.8[0.110]

0.5[0.020]
8.0[0.315]

UA2

(1.5)

3.2

[0.126][0.126] [0.087][0.087]

3.2
2.2 2.2[0.126] [0.087][0.087](1.5)

3.2[0.126]
7.4[0.291]*5.7[0.224]

Tolerance of lead pitch is ±0.15 mm[0.006 inch]
Another tolerance is ±0.3 mm [0.012inch]() is reference.
*Value of trimmed lead type (NJ type)

Tolerance of lead pitch is ±0.15 mm[0.006 inch]
Another tolerance is ±0.3 mm [0.012inch]() is reference.
*Value of minimum footprint type (NUN type)■ RECOMMENDED PAD LAYOUT(bottom view)

UA2

7.6
2.2

2.2

7.6
3.2

2.2

(mm)

2.2

8-ø0.85

*2.25
3.1

3.2

5.3
*4.6

3.2

UB2

(mm)

0.8

*Value of minimum footprint type (NUN type)Note. General tolerance : ±0.1

Note. General tolerance :±0.1■ SCHEMATICS (bottom view)
UA2

1

2

3

4

1

2

3

4

UB2

1

2

3

4

R S
Index mark ofrelay direction

8

7

6

5

Non-latch type(not energized position)

1

2

3

4

8

7

6

5

R S
8

7

6

5

Single coil latch type(reset position)

S : Coil polarity of set (operate)
R : Coil polarity of reset (release)

Index mark ofrelay direction

8

7

6

5

Non-latch type(not energized position)

Single coil latch type(reset position)

S : Coil polarity of set (operate)
R : Coil polarity of reset (release)

15●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UA2/UB2 Series■ SOLDERING CONDITION (UB2 Series)
IRS Method
Temperature (degree C)
max. 240
220
200
180

Time (sec.)

45 (max. 70)
70 (max. 120)
190 (max. 300)

Note
1. Temperature profile shows printed circuit board surface temperature on the relay terminal portion.
2. Check the actual soldering condition to use other method except above mentioned temperature profiles.

■ Recommended relay drive conditions
Drive under conditions. If it is impossible, please inquire to EM Devices.
Non-latch type
Single coil latch typeDouble coil latch type

Voltage: within ± 5% of nominal voltage
Square pulse (rise and fall time is rapidly)
Pulse height: within ± 5% of nominal voltage
Pulse width: more than 10 ms

Ambient temperature− 40 〜＋ 85˚C

■ Technical document
Please confirm technical document before use.
It is able to receive a document at EM Devicesʼ World-wide-web site.
(http://www.em-devices.com)
ITEM

TITLE

Data sheet

UA2/UB2 series

Information

UA2/UB2 series technical data

Userʼs manual

Function and note on correct use

Application note

Application circuit of miniature signal relay

16●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UA2/UB2 Series■ ORDERING PART NUMBERS
・UA2 series

OptionTerminal

PackingStandard

Tube

Trimmed lead

Nominal Coil
Voltage (VDC)

Coil Type
Non-latchSingle Coil Latch

Non-latch Low
Power Consumption3

UA2-3NU

UA2-3SNU

UA2-3NE

4.5

UA2-4.5NU

UA2-4.5SNU

UA2-4.5NE5

UA2-5NU

UA2-5SNU

UA2-5NE9

UA2-9NU

UA2-9SNU-

12

UA2-12NU

UA2-12SNU-

24

UA2-24NU--

3

UA2-3NJ

UA2-3SNJ-

4.5

UA2-4.5NJ

UA2-4.5SNJ-

5

UA2-5NJ

UA2-5SNJ-9

UA2-9NJ

UA2-9SNJ-

12

UA2-12NJ

UA2-12SNJ-

24

UA2-24NJ--・UB2 series
OptionTerminal

Packing

Tube

Standard

TapingTube

Minimum
footprint

TapingNominal Coil
Voltage (VDC)

Coil Type
Non-latchSingle Coil Latch

Non-latch Low
Power Consumption3

UB2-3NU

UB2-3SNU

UB2-3NE

4.5

UB2-4.5NU

UB2-4.5SNU

UB2-4.5NE

5

UB2-5NU

UB2-5SNU

UB2-5NE9

UB2-9NU

UB2-9SNU-

12

UB2-12NU

UB2-12SNU-

24

UB2-24NU--

3

UB2-3NU-L

UB2-3SNU-L

UB2-3NE-L

4.5

UB2-4.5NU-L

UB2-4.5SNU-L

UB2-4.5NE-L

5

UB2-5NU-L

UB2-5SNU-L

UB2-5NE-L9

UB2-9NU-L

UB2-9SNU-L-

12

UB2-12NU-L

UB2-12SNU-L-

24

UB2-24NU-L

-

-

3

UB2-3NUN

UB2-3SNUN

UB2-3NEN

4.5

UB2-4.5NUN

UB2-4.5SNUN

UB2-4.5NEN

5

UB2-5NUN

UB2-5SNUN

UB2-5NEN9

UB2-9NUN

UB2-9SNUN-

12

UB2-12NUN

UB2-12SNUN-

24

UB2-24NUN--

3

UB2-3NUN-L

UB2-3SNUN-L

UB2-3NEN-L

4.5

UB2-4.5NUN-L

UB2-4.5SNUN-L

UB2-4.5NEN-L

5

UB2-5NUN-L

UB2-5SNUN-L

UB2-5NEN-L9

UB2-9NUN-L

UB2-9SNUN-L-

12

UB-12NUN-L

UB2-12SNUN-L-

24

UB2-24NUN-L

-

-

17

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UC2 Series

NEXEMʼs UC2 relay is a new generation Miniature Signal Relay of super-compact size and flat-package.

■ FEATURES

・Small mounting size of flat package for dense mounting.
・Telcordia (2500 V) and FCC (1500 V) surge capability.
・IEC60950 / UL1950 / EN60950 spacing and high breakdown voltage.
(Basic insulation class on 200 V working voltage)・Low power consumption 100mW type is available
・UL recognized (E73266), CSA certified (LR46266), TÜV certified (R2050596)■ SPECIFICATIONSContact Form

2 Form C

Contact Material

Contact Ratings

Silver alloy with gold alloy overlay
Maximum Switching Power

30 W, 37.5 VA

Maximum Switching Voltage

220 VDC, 250 VAC

Maximum Switching Current

1A

Maximum Carrying Current

1A
10 mVDC, 10μA*1

Minimum Contact Ratings
Initial Contact ResistanceNominal Operating Power

100 mΩ max. (Initial)
Non-latch type

140 mW (1.5 to 12 V)

Single coil latch type

100 mW (1.5 to 12 V)

Operate Time (Excluding bounce)

Approx. 2 ms

Release Time (Excluding bounce)

Approx. 1 ms

Insulation Resistance1000 MΩ at 500 VDC
Between open contacts

Withstand Voltage

Between adjacent contacts
Between coil to contacts

100mW (Low power consumption type)1000 VAC (for one minute)1500 V surge (10 × 160μs*2)
1500 VAC (for one minute)2500 V surge (2 × 10μs*3)

Shock Resistance

735 m/s2 (misoperation)
980 m/s2 (destructive failure)

Vibration Resistance

10 to 55 Hz, double amplitude 3 mm (misoperation)
10 to 55 Hz, double amplitude 5 mm (destructive failure)

Ambient Temperature− 40 to ＋ 85˚C (Low power consumption type: − 40 to ＋ 70˚C)

Coil Temperature Rise
Running Specifications
Weight18 degrees at nominal coil voltage (140 mW)
Non-load

5 × 107 *4 operations (Non-latch type)Load

125 VAC, 0.3 A (resistive), 1 × 105 operations at 20˚C, 1 Hz

30 VDC, 1 A (resistive), 1 × 105 operations at 20˚C, 1 Hz
Approx. 0.8 g*1 This value is a reference value in the resistive load.
Minimum capacity changes depending on switching frequency and environment temperature and the load.
*2 Rise time : 10μs, decay time to half crest : 160μs*3 Rise time : 2μs, decay time to half crest : 10μs
*4 This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of operation by whicha steady characteristic is maintained is 1 × 107 operations.

18●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UC2 Series■ PART NUMBER SYSTEM■ SAFETY STANDARD AND RATING

UC2-3SNUUL Recognized(UL508)*File No. E73266

OptionNU : Standard
NJ : Trimmed lead type
NE : Low power consumption type

CSA Certified(CSA C22.2 No14) ＋File No. LR46266

30 VDC, 1 A(Resistive)
110 VDC, 0.3 A (Resistive)
125 VAC, 0.5 A (Resistive)

Latch type
Nil : Non-latch type
S : Single coil latch type* Spacing : UL840＋
Spacing : CSA std950

Nominal coil voltage
A numerical value of coil voltage(See part numbers)

TÜV Certified(EN61810)
No. R 2050596

Series name

Creepage and clearance of coil to contact is over than 2 mm.
(According to EN60950)
Basic insulation class■ COIL SPECIFICATIONS・Non-latch Typeat 20℃

Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

3

64.3

2.25

0.3

140

4.5

145

3.38

0.45

140

5

178

3.75

0.5

140

9

579

6.75

0.9

140

12

1028

9.0

1.2

140

Coil Resistance(Ω) ± 10%Set Voltage*(VDC)

Reset Voltage*(VDC)

Nominal Operating Power(mW)・Single Coil Latch Type
Nominal Coil Voltage(VDC)

at 20℃

3

90

2.25

2.25

100

4.5

202.5

3.38

3.38

100

5

250

3.75

3.75

100

9

810

6.75

6.75

100

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power(mW)

・Non-latch Low Power Consumption Type
Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%at 20℃

3

90

2.4

0.3

100

4.5

202.5

3.6

0.45

100

5

250

4.0

0.5

100

* Test by pulse voltage

19●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UD2 Series

NEXEMʼs UD2 relay is a new generation Miniature Signal Relay of super-compact size and flat-package for surface
mounting.

■ FEATURES

・Small mounting size of flat package for dense mounting.
・Telcordia (2500 V) and FCC (1500 V) surge capability.
・IEC60950 / UL1950 / EN60950 spacing and high breakdown voltage.
(Basic insulation class on 200 V working voltage)・Low power consumption 100 mW type is available
・UL recognized (E73266), CSA certified (LR46266), TÜV certified (R2050596)
・Tube or embossed tape packaging.

■ SPECIFICATIONSContact Form

2 Form C

Contact Material

Contact Ratings

Silver alloy with gold alloy overlay
Maximum Switching Power

30 W, 37.5 VA

Maximum Switching Voltage

220 VDC, 250 VAC

Maximum Switching Current

1A

Maximum Carrying Current

1A
10 mVDC, 10μA*1

Minimum Contact Ratings
Initial Contact ResistanceNominal Operating Power

100 mΩ max. (Initial)
Non-latch type

140 mW (1.5 to 12 V)

Single coil latch type

100 mW (1.5 to 12 V)

Operate Time (Excluding bounce)

Approx. 2 ms

Release Time (Excluding bounce)

Approx. 1 ms

Insulation Resistance1000 MΩ at 500 VDC
Between open contacts

Withstand Voltage

Between adjacent contacts
Between coil to contacts

100mW (Low power consumption type)1000 VAC (for one minute)1500 V surge (10 × 160μs*2)
1500 VAC (for one minute)2500 V surge (2 × 10μs*3)

Shock Resistance

735 m/s2 (misoperation)
980 m/s2 (destructive failure)

Vibration Resistance

10 to 55 Hz, double amplitude 3 mm (misoperation)
10 to 55 Hz, double amplitude 5 mm (destructive failure)

Ambient Temperature− 40 to ＋ 85˚C (Low power consumption type: − 40 to ＋ 70˚C)

Coil Temperature Rise

18 degrees at nominal coil voltage (140 mW)
Non-load

Running Specifications
WeightLoad

5 × 107 *4 operations (Non-latch type)
30 VDC, 1 A (resistive), 1 × 105 operations at 20˚C, 1 Hz
125 VAC, 0.3 A (resistive), 1 × 105 operations at 20˚C, 1 Hz
Approx. 0.8 g*1 This value is a reference value in the resistive load.
Minimum capacity changes depending on switching frequency and environment temperature and the load.
*2 Rise time : 10μs, decay time to half crest : 160μs*3 Rise time : 2μs, decay time to half crest : 10μs
*4 This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of operation by whicha steady characteristic is maintained is 1 × 107 operations.

20●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UD2 Series■ PART NUMBER SYSTEM■ SAFETY STANDARD AND RATING

UD2-3SNU - L

UL Recognized(UL508)*File No. E73266

Packing
Nil : Tube
L : Embossed carrying tape of L type
OptionNU : Standard
NUN : Minimum footprint type
NE : Low power consumption type
NEN : Low power consumption type with minimum foot print

CSA Certificated(CSA C22.2 No14) ＋File No. LR46266

30 VDC, 1 A(Resistive)
110 VDC, 0.3 A (Resistive)
125 VAC, 0.5 A (Resistive)* Spacing : UL840＋
Spacing : CSA std950

TÜV Certified(EN61810)

Latch type
Nil : Non-latch type
S : Single coil latch type

No. R 2050596
Creepage and clearance of coil to contact is over than 2 mm.
(According to EN60950)

Nominal coil voltage
A numerical value of coil voltage(See part numbers)

Basic insulation class

Series name

■ COIL SPECIFICATIONS・Non-latch Typeat 20℃

Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

3

64.3

2.25

0.3

140

4.5

145

3.38

0.45

140

5

178

3.75

0.5

140

9

579

6.75

0.9

140

12

1028

9.0

1.2

140

Coil Resistance(Ω) ± 10%Set Voltage*(VDC)

Reset Voltage*(VDC)

Nominal Operating Power(mW)・Single Coil Latch Type
Nominal Coil Voltage(VDC)

at 20℃

3

90

2.25

2.25

100

4.5

202.5

3.38

3.38

100

5

250

3.75

3.75

100

9

810

6.75

6.75

100

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power(mW)

・Non-latch Low Power Consumption Type
Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%at 20℃

3

90

2.4

0.3

100

4.5

202.5

3.6

0.45

100

5

250

4.0

0.5

100

* Test by pulse voltage

21●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UC2/UD2 Series■ DIMENSIONS mm(inch)
UC2

UD2

mm [inch]

3.2
2.2
2.2
[0.126] [0.087] [0.087]

6.5 [0.256]
5.45 [0.215] max.
*6.0 [0.236] max.

10.6 [0.417]

0.2

3.4 [0.134]∗2.8 [0.110](1.5)

mm [inch]

6.5 [0.256]

5.3 [0.209]

10.6 [0.417]

(1.5)

(1.5)

3.2
2.2
2.2
[0.126] [0.087] [0.087]

5.08
[0.2]

(1.5)

5.08 [0.2]
8.4 [0.331]* 6.8 [0.268]

Tolerance of lead pitch is ±0.15 mm [0.006inch]
Another tolerance is ±0.3 mm [0.012 inch]( ) is reference value.
*Value of minimum footprint type (NUN type)

Tolerance of lead pitch is ±0.15 mm [0.006inch]
Another tolerance is ±0.3 mm [0.012 inch]( ) is reference value.
∗Value of trimmed lead type (NJ type)■ RECOMMENDED PAD LAYOUT(bottom view)

UC2

UD2
(mm)

7.6
2.2

2.2

(mm)

2.2

8-φ 0.85

2.2

*1.86
2.66

5.08

6.74

*5.94

3.2

3.2

0.8

Note. General tolerance : ±0.1

*Value of minimum footprint type (NUN type)Note. General tolerance : ±0.1

■ SCHEMATICS (bottom view)
UC2

1

2

3

4

1

2

3

4

UD2

1

2

3

4

R S
Index mark ofrelay direction

8

7

6

5

Non-latch type(not energized position)

1

2

3

4

8

7

6

5

R S
8

7

6

5

Single coil latch type(reset position)

S : Coil polarity of set (operate)
R : Coil polarity of reset (release)

Index mark ofrelay direction

8

7

6

5

Non-latch type(not energized position)

Single coil latch type(reset position)

S : Coil polarity of set (operate)
R : Coil polarity of reset (release)

22●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UC2/UD2 Series■ SOLDERING CONDITION (UD2 Series)
IRS Method
Temperature (degree C)
max. 240
220
200
180

Time (sec.)

45 (max. 70)
70 (max. 120)
190 (max. 300)

Note
1. Temperature profile shows printed circuit board surface temperature on the relay terminal portion.
2. Check the actual soldering condition to use other method except above mentioned temperature profiles.

■ Recommended relay drive conditions
Drive under conditions. If it is impossible, please inquire to EM Devices.
Non-latch type
Voltage: within ± 5% of nominal voltage
Non-latch NE type
Single coil latch typeSquare pulse (rise and fall time is rapidly)
Pulse height: within ± 5% of nominal voltage
Pulse width: more than 10 ms

Ambient temperature− 40 〜＋ 85˚C
Ambient temperature− 40 〜＋ 70˚C
Ambient temperature− 40 〜＋ 85˚C

■ Technical document
Please confirm technical document before use.
It is able to receive a document at EM Devicesʼ World-wide-web site.
(http://www.em-devices.com)
ITEM

TITLE

Data sheet

UC2/UD2 series

Information

UC2/UD2 series technical data

Userʼs manual

Function and note on correct use

Application note

Application circuit of miniature signal relay

23●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

UC2/UD2 Series■ ORDERING PART NUMBERS
・UC2 series

OptionTerminal

PackingStandard

Tube

Trimmed lead

Nominal Coil
Voltage (VDC)

Coil Type
Non-latchSingle Coil Latch

Non-latch Low
Power Consumption3

UC2-3NU

UC2-3SNU

UC2-3NE

4.5

UC2-4.5NU

UC2-4.5SNU

UC2-4.5NE5

UC2-5NU

UC2-5SNU

UC2-5NE9

UC2-9NU

UC2-9SNU-

12

UC2-12NU--

3

UC2-3NJ

UC2-3SNJ-

4.5

UC2-4.5NJ

UC2-4.5SNJ-

5

UC2-5NJ

UC2-5SNJ-9

UC2-9NJ

UC2-9SNJ-

12

UC2-12NJ--

Nominal Coil
Voltage (VDC)

Non-latchSingle Coil Latch

・UD2 series
OptionTerminal

Packing

Tube

Standard

TapingTube
Minimum
footprint
TapingCoil Type
Non-latch Low
Power Consumption3

UD2-3NU

UD2-3SNU

UD2-3NE

4.5

UD2-4.5NU

UD2-4.5SNU

UD2-4.5NE5

UD2-5NU

UD2-5SNU

UD2-5NE9

UD2-9NU

UD2-9SNU-

12

UD2-12NU--

3

UD2-3NU-L

UD2-3SNU-L

UD2-3NE-L

4.5

UD2-4.5NU-L

UD2-4.5SNU-L

UD2-4.5NE-L

5

UD2-5NU-L

UD2-5SNU-L

UD2-5NE-L9

UD2-9NU-L

UD2-9SNU-L-

12

UD2-12NU-L

-

-

3

UD2-3NUN

UD2-3SNUN

UD2-3NEN

4.5

UD2-4.5NUN

UD2-4.5SNUN

UD2-4.5NEN

5

UD2-5NUN

UD2-5SNUN

UD2-5NEN9

UD2-9NUN

UD2-9SNUN-

12

UD2-12NUN--3

UD2-3NUN-L

UD2-3SNUN-L

UD2-3NEN-L

4.5

UD2-4.5NUN-L

UD2-4.5SNUN-L

UD2-4.5NEN-L

5

UD2-5NUN-L

UD2-5SNUN-L

UD2-5NEN-L

9

UD2-9NUN-L

UD2-9SNUN-L-

12

UD2-12NUN-L

-

-

24

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EA2 Series

The EA2 series has reduced package size and power consumption compared to other NEXEM conventional relays.
Furthermore, it complies with 1500 V surge-voltage requirement of FCC Part 68 by the unique structure and the efficientmagnetic circuit.

■ FEATURES

・Low power consumption
・Compact and light weight・2 Form C contact arrangement
・Low magnetic interference・Breakdown voltage : 1000 VAC (surge voltage 1500 V), FCC Part 68 compliant
・Tube packaging
・UL recognized (E73266), CSA certified (LR46266)■ SPECIFICATIONSContact Form

2 Form C

Contact Material

Contact Ratings

Silver alloy with gold alloy overlay
Maximum Switching Power

30 W, 62.5 VA

Maximum Switching Voltage

220 VDC, 250 VAC

Maximum Switching Current

1A

Maximum Carrying Current

2A
10 mVDC, 10μA*1

Minimum Contact Ratings
Initial Contact ResistanceNominal Operating Power75 mΩ max. (Initial)
Non-latch type

140 mW (3 to 12 V), 200 mW (24 V)

Single coil latch type

100 mW (3 to 12 V), 150 mW (24 V)

Double coil latch type

140 mW (3 to 12 V), 200 mW (24 V)

Operate Time (Excluding bounce)

Approx. 2 ms

Release Time (Excluding bounce)

Approx. 1 ms (without diode)

Insulation Resistance1000 MΩ at 500 VDC
Between open contacts

Withstand Voltage

Between adjacent contacts
Between coil to contacts

1000 VAC (for one minute)1500 V surge (10 × 160μs*2)1000 VAC (for one minute)1500 V surge (10 × 160μs*2)

Shock Resistance

735 m/s2 (misoperation)
980 m/s2 (destructive failure)

Vibration Resistance

10 to 55 Hz, double amplitude 3 mm (misoperation)
10 to 55 Hz, double amplitude 5 mm (destructive failure)

Ambient Temperature− 40 to ＋ 85˚C

Coil Temperature Rise

18 degrees at nominal coil voltage (140 mW)
Non-load

Running Specifications
WeightLoad

1 × 108 *3 operations (Non-latch type) 1 × 107 operations (latch type)
50 VDC, 0.1 A (resistive) 1 × 106 operations at 85˚C, 5 Hz
10 VDC, 10 mA (resistive) 1 × 106 operations at 85˚C, 2 Hz
Approx. 1.5 g*1 This value is a reference value in the resistive load.
Minimum capacity changes depending on switching frequency and environment temperature and the load.
*2 Rise time : 10μs, decay time to half crest : 160μs*3 This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of operation by whicha steady characteristic is maintained is 1 × 107 operations.

25●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EA2 Series■ PART NUMBER SYSTEM■ SAFETY STANDARD AND RATING

EA2-3SNUUL Recognized(UL508)File No. E73266

NU : Standard type
NJ : Trimmed leads type

30 VDC, 1A
110 VDC, 0.3A
125 VAC, 0.5A

Latch type
Nil : Non-latch type (standard)
S : Single coil latch type
T : Double coil latch type

CSA Certificated(CSA C22.2 No14)
File No. LR46266(Resistive)(Resistive)(Resistive)

Nominal coil voltage (See part numbers)■ COIL SPECIFICATIONS・Non-latch Typeat 20℃

Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

3

64.3

2.25

0.3

140

4.5

145

3.38

0.45

140

5

178

3.75

0.5

140

12

1028

9.0

1.2

140

24

2880

18.0

2.4

200

Coil Resistance(Ω) ± 10%Set Voltage*(VDC)

Reset Voltage*(VDC)

Nominal Operating Power(mW)・Single Coil Latch Type
Nominal Coil Voltage(VDC)

at 20℃

3

90

2.25

2.25

100

4.5

202.5

3.38

3.38

100

5

250

3.75

3.75

100

12

1440

9.0

9.0

100

24

3840

18.0

18.0

150

Reset Voltage**(VDC)

Nominal Operating Power(mW)

・Double Coil Latch Type (Can not be driven by reverse polarity for reverse operation)
Nominal Coil Voltage
(VDC)
3
4.5
5
12
24

Coil Resistance(Ω) ± 10%Set Voltage**(VDC)

at 20℃

S

64.3

2.25

-

R

64.3

-

2.25

S

145

3.38

-

R

145

-

3.38

S

178

3.75

-

R

178

-

3.75

S

1028

9.0

-

R

1028

-

9.0

S

2880

18.0

-

R

2880

-

18.0

140
140
140
140
200

* Test by pulse voltage** S : Set coil (pin No.1...(+) , pin No.5...(-) ) R : Reset coil (pin No.10...(+) , pin No.6...(-) )The latch type relays should be initialized at appointed position before using, and should be energized to specific polarity by above polarity to avoid wrong operation.
Any special coil requirement, please contact EM Devices for availability.

26●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EB2 Series

The EB2 series has adapted IRS, VPS surface mounting technique,and sustained the high-performance of EA2 series.

■ FEATURES

・Compact and light weight・2 Form C contact arrangement
・Low power consumption
・Low magnetic interference・Breakdown voltage : 1000 VAC (surge voltage 1500 V),
FCC Part 68 compliant
・Tube or Embossed tape packaging
・UL recognized (E73266), CSA certified (LR46266)■ SPECIFICATIONSContact Form

2 Form C

Contact Material

Contact Ratings

Silver alloy with gold alloy overlay
Maximum Switching Power

30 W, 62.5 VA

Maximum Switching Voltage

220 VDC, 250 VAC

Maximum Switching Current

1A

Maximum Carrying Current

2A
10 mVDC, 10μA*1

Minimum Contact Ratings
Initial Contact ResistanceNominal Operating Power75 mΩ max. (Initial)
Non-latch type

140 mW (3 to 12 V), 200 mW (24 V)

Single coil latch type

100 mW (3 to 12 V), 150 mW (24 V)

Double coil latch type

140 mW (3 to 12 V), 200 mW (24 V)

Operate Time (Excluding bounce)

Approx. 2 ms

Release Time (Excluding bounce)

Approx. 1 ms (without diode)

Insulation Resistance1000 MΩ at 500 VDC
Between open contacts

Withstand Voltage

Between adjacent contacts
Between coil to contacts

1000 VAC (for one minute)1500 V surge (10 × 160μs*2)1000 VAC (for one minute)1500 V surge (10 × 160μs*2)

Shock Resistance

735 m/s2 (misoperation)
980 m/s2 (destructive failure)

Vibration Resistance

10 to 55 Hz, double amplitude 3 mm (misoperation)
10 to 55 Hz, double amplitude 5 mm (destructive failure)

Ambient Temperature− 40 to ＋ 85˚C

Coil Temperature Rise
Running Specifications
Weight18 degrees at nominal coil voltage (140 mW)
Non-load

1 × 108 *3 operations (Non-latch type) 1 × 107 operations (latch type)

Load

10 VDC, 10 mA (resistive) 1 × 106 operations at 85˚C, 2 Hz

50 VDC, 0.1 A (resistive) 1 × 106 operations at 85˚C, 5 Hz
Approx. 1.5 g*1 This value is a reference value in the resistive load.
Minimum capacity changes depending on switching frequency and environment temperature and the load.
*2 Rise time : 10μs, decay time to half crest : 160μs*3 This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of operation by which a
steady characteristic is maintained is 1 × 2107 operations.

27●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EB2 Series■ PART NUMBER SYSTEM
EB2-3SNU-L■ SAFETY STANDARD AND RATINGUL Recognized(UL508)File No. E73266

Packing
Nil: Tube
L: Embossed carrying tape (L type)
NU: Standard type
Latch type
Nil: Non-latch type (standard)
S: Single coil latch type
T: Double coil latch type

CSA Certificated(CSA C22.2 No14)
File No. LR46266

30 VDC, 1 A(Resistive)
110 VDC, 0.3 A (Resistive)
125 VAC, 0.5 A (Resistive)

Nominal coil voltage (See part numbers)■ COIL SPECIFICATIONS・Non-latch Typeat 20℃

Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

3

64.3

2.25

0.3

140

4.5

145

3.38

0.45

140

5

178

3.75

0.5

140

12

1028

9.0

1.2

140

24

2880

18.0

2.4

200

Coil Resistance(Ω) ± 10%Set Voltage*(VDC)

Reset Voltage*(VDC)

Nominal Operating Power(mW)・Single Coil Latch Type
Nominal Coil Voltage(VDC)

at 20℃

3

90

2.25

2.25

100

4.5

202.5

3.38

3.38

100

5

250

3.75

3.75

100

12

1440

9.0

9.0

100

24

3840

18.0

18.0

150

Reset Voltage**(VDC)

Nominal Operating Power(mW)

・Double Coil Latch Type (Can not be driven by reverse polarity for reverse operation)
Nominal Coil Voltage
(VDC)
3
4.5
5
12
24

Coil Resistance(Ω) ± 10%Set Voltage**(VDC)

at 20℃

S

64.3

2.25

-

R

64.3

-

2.25

S

145

3.38

-

R

145

-

3.38

S

178

3.75

-

R

178

-

3.75

S

1028

9.0

-

R

1028

-

9.0

S

2880

18.0

-

R

2880

-

18.0

140
140
140
140
200

* Test by pulse voltage** S : Set coil (pin No.1...(+) , pin No.5...(-) ) R : Reset coil (pin No.10...(+) , pin No.6...(-) )The latch type relays should be initialized at appointed position before using, and should be energized to specific polarity by above polarity to avoid wrong operation.
Any special coil requirement, please contact EM Devices for availability.

28●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EA2/EB2 Series■ DIMENSIONS mm(inch)
EB2

0.25
(0.01)

7.62

1.35(0.05)

2.54(0.10)

9.3max.(0.37)
7.5max.(0.3)

0.5(0.02)

14.3max.(0.56)

9.2max.
(0.36)

5.4max.
(0.21)

14.2max.
(0.56)

3.5(0.14)

0.33 (0.013)

EA2

2.54 2.54 2.54 2.54 (0.1)(0.30)

7.62(0.3)

11.5(0.45)

Note: Tolerance ±0.2 unless otherwise specified+ 0.2 mm unless otherwise specified
Note : Tolerance _NJ: Cover height — 6.3mm, Lead —2.8mm■ RECOMMENDED PAD LAYOUT(bottom view) mm (inch)

EA2

EB2
1.0(0.04)

9.56(0.38)(3×0.1)

7.62
(0.1)

2.54

2.54
(0.1)

2.54(0.1)

2.94(0.12)

10 – φ 0.8 (0.03)

10.16
10.16 (0.40)(4×0.1)■ SCHEMATICS (bottom view)
EA2

EB2

S
1

2

3

4

5

1

2

3

4

5

1

2

3

4

5

10

9

8

7

6

10

9

8

7

6

S
1

2

3

4

5

10

9

8

7

6

R S
10

9

8

7

6

1

2

3

4

5

1

2

3

4

5

10

9

8

7

6

10

9

8

7

6

RS

Index mark ofrelay direction
Non-latch type
Single coil latch type(not energized position)(reset position)*Not useNo. 5,6 pins

R

Double coil latch type(reset position)
Can not be driven byreverse polarity forreverse operation.
S : Coil polarity of set (operate)
R : Coil polarity of reset (release)

Index mark ofrelay direction

Non-latch type(not energized position)

Single coil latch type(reset position)*Not useNo. 5, 6 pins

R
Double coil latch type(reset position)
Can not be driven by reverse
polarity for reverse operation.
S : Coil polarity of set (operate)
R : Coil polarity of reset (release)

29●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EA2/EB2 Series■ SOLDERING CONDITION (EB2 Series)
IRS Method
Temperature (degree C)
max. 240
220
200
180

Time (sec.)

45 (max. 70)
70 (max. 120)
190 (max. 300)

Note
1. Temperature profile shows printed circuit board surface temperature on the relay terminal portion.
2. Please check the actual soldering condition to use other method except above mentioned temperature profiles.

■ Recommended relay drive conditions
Drive under conditions. If it is impossible, please inquire to EM Devices.
Non-latch type
Single coil latch typeDouble coil latch type

Voltage: within ± 5% of nominal voltage
Square pulse (rise and fall time is rapidly)
Pulse height: within ± 5% of nominal voltage
Pulse width: more than 10 ms

Ambient temperature− 40 〜＋ 85˚C

■ Technical document
Please confirm technical document before use.
It is able to receive a document at EM Devicesʼ World-wide-web site.
(http://www.em-devices.com)
ITEM
Data sheet
Information

TITLE
EA2/EB2 series
EA2 series technical data
EB2 series technical data

Userʼs manual

Function and note on correct use

Application note

Application circuit of miniature signal relay

30●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EA2/EB2 Series■ ORDERING PART NUMBERS
・EA2 series

OptionTerminal

PackingStandard

Tube

Trimmed lead

Coil Type

Nominal Coil
Voltage (VDC)

Non-latchSingle Coil Latch

3

EA2-3NU

EA2-3SNU

EA2-3TNU

4.5

EA2-4.5NU

EA2-4.5SNU

EA2-4.5TNU

Double Coil Latch

5

EA2-5NU

EA2-5SNU

EA2-5TNU

12

EA2-12NU

EA2-12SNU

EA2-12TNU

24

EA2-24NU

EA2-24SNU

EA2-24TNU

3

EA2-3NJ

EA2-3SNJ

EA2-3TNJ

4.5

EA2-4.5NJ

EA2-4.5SNJ

EA2-4.5TNJ

5

EA2-5NJ

EA2-5SNJ

EA2-5TNJ

12

EA2-12NJ

EA2-12SNJ

EA2-12TNJ

24

EA2-24NJ

EA2-24SNJ

EA2-24TNJ

Nominal Coil
Voltage (VDC)

Non-latchSingle Coil Latch

3

EB2-3NU

EB2-3SNU

EB2-3TNU

4.5

EB2-4.5NU

EB2-4.5SNU

EB2-4.5TNU

・EB2 series
OptionTerminal

Packing

Tube

Standard

TapingCoil TypeDouble Coil Latch

5

EB2-5NU

EB2-5SNU

EB2-5TNU

12

EB2-12NU

EB2-12SNU

EB2-12TNU

24

EB2-24NU

EB2-24SNU

EB2-24TNU

3

EB2-3NU-L

EB2-3SNU-L

EB2-3TNU-L

4.5

EB2-4.5NU-L

EB2-4.5SNU-L

EB2-4.5TNU-L

5

EB2-5NU-L

EB2-5SNU-L

EB2-5TNU-L

12

EB2-12NU-L

EB2-12SNU-L

EB2-12TNU-L

24

EB2-24NU-L

EB2-24SNU-L

EB2-24TNU-L

31●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EC2 Series

The EC2 series has reduced mounting space but sustained high- performance of NEXEM EA2 series. Furthermore, it
complies with 2500 V surge-voltage requirement of Telcordia specifications.

■ FEATURES

・Compact and light weight・2 Form C contact arrangement
・Low power consumption
・Reduced mounting space: 15 mm × 7.5 mm
・High-breakdown voltage of coil to contacts:
1500 VAC, 2500 V, (2 × 10μs*3)
・Capable of High-power switching:
700 VAC, 4.2A, 4 times in case of accident
・ND type (High-insulation type) conform tosupplementary insulation for EN60950 (TÜV certified)■ SPECIFICATIONSContact Form

2 Form C

Contact Material

Contact Ratings

Silver alloy with gold alloy overlay
Maximum Switching Power60 W, 125 VA

Maximum Switching Voltage

220 VDC, 250 VAC

Maximum Switching Current

2A

Maximum Carrying Current

2A
10 mVDC, 10μA*1

Minimum Contact Ratings
Initial Contact ResistanceNominal Operating Power75 mΩ max. (Initial)
Non-latch type

140 mW (3 to 12 V), 200 mW (24 V)(ND type: 200 to 230 mW)

Single coil latch type

100 mW (ND type: 100 to 170 mW)

Double coil latch type

140 mW

Operate Time (Excluding bounce)

Approx. 2 ms

Release Time (Excluding bounce)

Approx. 1 ms (without diode)

Insulation Resistance1000 MΩ at 500 VDC
Between open contacts

1000 VAC (for one minute) 1500 V surge (10 × 160μs*2)

Between adjacent contacts

1000 VAC (for one minute), 1500 V surge (10 × 160μs*2)
1500 VAC (for one minute), 2500 V surge (2 × 10μs*3)

Withstand Voltage
Between coil to contacts[Double coil latch type]1000 VAC (for one minute), 1500 V surge (10 × 160μs*2)

Shock Resistance

735 m/s2 (misoperation)
980 m/s2 (destructive failure)

Vibration Resistance

10 to 55 Hz, double amplitude 3 mm (misoperation)
10 to 55 Hz, double amplitude 5 mm (destructive failure)

Ambient Temperature− 40 to 85˚C

Coil Temperature Rise
Running Specifications
Weight18 degrees at nominal coil voltage (140 mW)
Non-load

1 × 108 *4 operations (Non-latch type) 1 × 107 operations (latch type)

Load

10 VDC, 10 mA (resistive) 1 × 106 operations at 85˚C, 2 Hz

50 VDC, 0.1 A (resistive) 1 × 106 operations at 85˚C, 5 Hz
Approx. 1.9 g*1 This value is a reference value in the resistive load.
Minimum capacity changes depending on switching frequency and environment temperature and the load.
*2 Rise time : 10μs, decay time to half crest : 160μs*3 Rise time : 2μs, decay time to half crest : 10μs
*4 This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of operation by whicha steady characteristic is maintained is 1 × 107 operations.
32●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EC2 Series■ PART NUMBER SYSTEM■ SAFETY STANDARD AND RATING

EC2-3SNUUL Recognized(UL508)File No. E73266

NU : Standard type
NJ : Trimmed leads type
ND : High insulation type (TUV certified)

CSA Certificated(CSA C22.2 No14)
File No. LR46266

30 VDC, 2 A(Resistive)
110 VDC, 0.3 A (Resistive)
125 VAC, 0.5 A (Resistive)

Latch type
Nil : Non-latch type (standard)
S : Single coil latch type
T : Double coil latch typeTÜV Certificate

Nominal coil voltage (See part numbers)(IEC61810/EN61810)(EN61810)

No. R 9750561

No. R 9751153

ND Type(Non-latch and Single coil latch)

NU, NJ Type
(Non-latch and Single coil latch)

Creepage and clearance of coil to contact is more than 2 mm.
(According to EN60950)
Supplementary insulation class

Basic insulation class■ COIL SPECIFICATIONS・Non-latch Typeat 20℃

Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

3

64.3

2.25

0.3

140

4.5

145

3.38

0.45

140

5

178

3.75

0.5

140

9

579

6.75

0.9

140

12

1028

9.0

1.2

140

24

2880

18.0

2.4

200

Coil Resistance(Ω) ± 10%Set Voltage*(VDC)

Reset Voltage*(VDC)

Nominal Operating Power(mW)・Single Coil Latch Type
Nominal Coil Voltage(VDC)

at 20℃

3

90

2.25

2.25

100

4.5

202.5

3.38

3.38

100

5

250

3.75

3.75

100

9

810

6.75

6.75

100

12

1440

9.0

9.0

100

24

5760

18.0

18.0

100

33

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EC2 Series
・Double Coil Latch Type (Can not be driven by reverse polarity for reverse operation)
Nominal Coil Voltage
(VDC)
3
4.5
5
9
12
24

Coil Resistance(Ω) ± 10%Set Voltage**(VDC)

at 20℃
Reset Voltage**
(VDC)

S

64.3

2.25

-

R

64.3

-

2.25

S

145

3.38

-

R

145

-

3.38

S

178

3.75

-

R

178

-

3.75

S

579

6.75

-

R

579

-

6.75

S

1028

9.0

-

R

1028

-

9.0

S

4114

18.0

-

R

4114

-

18.0

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)
140
140
140
140
140
140

・Non-latch High Insulation (ND) Type
Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%at 20℃
Nominal Operating Power
(mW)

3

45

2.25

0.3

200

4.5

101

3.38

0.45

200

5

125

3.75

0.5

200

9

405

6.75

0.9

200

12

720

9.0

1.2

200

24

2504

18.0

2.4

230

Set Voltage*(VDC)

Reset Voltage*(VDC)

Nominal Operating Power(mW)・Single Coil Latch High Insulation (ND) Type
Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%at 20℃

3

90

2.25

2.25

100

4.5

203

3.38

3.38

100

5

250

3.75

3.75

100

9

810

6.75

6.75

100

12

960

9.0

9.0

150

24

3388

18.0

18.0

170

* Test by pulse voltage** S : Set coil (pin No.1...(+) , pin No.12...(-) ) R : Reset coil (pin No.6...(+) , pin No.7...(-) )The latch type relays should be initialized at appointed position before using, and should be energized to specific polarity by above polarity to avoid wrong operation.
Any special coil requirement, please contact EM Devices for availability.

34●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EE2 Series

The EE2 series is surface-mounting type sustaining high-performance of NEXEM EC2 series.

■ FEATURES

・Compact and light weight ・2 Form C contact arrangement
・Low power consumption
・Reduced mounting space: 15 mm × 9.5 mm
・High-breakdown voltage of coil to contacts: 1500 VAC, 2500 V, (2 × 10μs*3)
・Capable of High-power switching : 700 VAC, 4.2 A ,4 times in case of accident
・NKX type guarantee 1500VAC over withstand voltage at open contact.
(Only make contact)
・ND type (High-insulation type) conform to supplementary insulation for EN60950 (TÜV certified)■ SPECIFICATIONSContact FormContact Material

Contact Ratings

Maximum Switching Power
Maximum Switching Voltage
Maximum Switching Current
Maximum Carrying Current

10 mVDC, 10μA*1

Minimum Contact Ratings
Initial Contact ResistanceNon-latch type
Nominal Operating Power

Single coil latch typeDouble coil latch typeOperate Time (Excluding bounce)
Release Time (Excluding bounce)
Insulation Resistance
Between open contacts
Withstand Voltage

Between adjacent contacts
Between coil to contacts

Shock ResistanceVibration ResistanceAmbient Temperature
Coil Temperature Rise
Non-load
Running Specifications
Weight2 Form C
Silver alloy with gold alloy overlay
60 W, 125 VA
220 VDC, 250 VAC
2A
2A

Load

75 mΩ max. (Initial)
140 mW (3 to 12 V), 200mW (24 V)(ND type: 200 to 230 mW) (NKX type: 230 mW)
100 mW (ND type: 100 to 170 mW)
140 mW
Approx. 2 ms
Approx. 1 ms (without diode)1000 MΩ at 500 VDC1000 VAC (for one minute) 1500 V surge (10 × 160μs*2)[NKX type]
Make contact: 1500 VAC (for one minute) 2500 V surge (2 × 10μs*3)
Break contact: 1000 VAC (for one minute) 1500 V surge (10 × 160μs*2)1000 VAC (for one minute), 1500 V surge (10 × 160μs*2)
1500 VAC (for one minute), 2500 V surge (2 × 10μs*3)[Double coil latch type]1000 VAC (for one minute), 1500 V surge (10 × 160μs*2)
735 m/s2 (misoperation)
980 m/s2 (destructive failure)
10 to 55 Hz, double amplitude 3 mm (misoperation)
10 to 55 Hz, double amplitude 5 mm (destructive failure)− 40 to ＋ 85℃
18 degrees at nominal coil voltage (140 mW)
1 × 108 *4 operations (Non-latch type) 1 × 107 operations (latch type)
50 VDC, 0.1 A (resistive) 1 × 106 operations at 85℃ , 5 Hz
10 VDC, 10 mA (resistive) 1 × 106 operations at 85℃ , 2 Hz
Approx. 1.9 g*1 This value is a reference value in the resistive load.
Minimum capacity changes depending on switching frequency and environment temperature and the load.
*2 Rise time : 10μs, decay time to half crest : 160μs*3 Rise time : 2μs, decay time to half crest : 10μs
*4 This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of operation by which a
steady characteristic is maintained is 1 × 107 operations.
35●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EE2 Series■ PART NUMBER SYSTEM■ SAFETY STANDARD AND RATING

EE2-3SNU-LUL Recognized(UL508)File No. E73266

Packing
Nil: Tube
L: Embossed carrying tape (L type)

CSA Certificated(CSA C22.2 No14)
File No. LR46266

30 VDC, 2 A(Resistive)
110 VDC, 0.3 A (Resistive)
125 VAC, 0.5 A (Resistive)

NU: Standard type
NUH: Minimum footprint type
NUX: High solder joint reliability type
ND: High-insulation type (TUV certified)
NKX: High breakdown voltage between open
contacts and high solder joint reliability typeTÜV Certificate

Latch type
Nil: Non-latch type (standard)
S: Single coil latch type
T: Double coil latch type
Nominal coil voltage (See part numbers)(IEC61810/EN61810)(EN61810)

No. R 9750561

No. R 9751153

ND Type(Non-latch and Single coil latch)

NU, NUH, NUX Type
(Non-latch and Single coil latch)

Creepage and clearance of coil to contact is more than 2 mm.
(According to EN60950)
Supplementary insulation class

Basic insulation class■ COIL SPECIFICATIONS・Non-latch Typeat 20℃

Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

3

64.3

2.25

0.3

140

4.5

145

3.38

0.45

140

5

178

3.75

0.5

140

9

579

6.75

0.9

140

12

1028

9.0

1.2

140

24

2880

18.0

2.4

200

Coil Resistance(Ω) ± 10%Set Voltage*(VDC)

Reset Voltage*(VDC)

Nominal Operating Power(mW)・Single Coil Latch Type
Nominal Coil Voltage(VDC)

at 20℃

3

90

2.25

2.25

100

4.5

202.5

3.38

3.38

100

5

250

3.75

3.75

100

9

810

6.75

6.75

100

12

1440

9.0

9.0

100

24

5760

18.0

18.0

100

Reset Voltage**(VDC)

Nominal Operating Power(mW)

・Double Coil Latch Type (Can not be driven by reverse polarity for reverse operation)
Nominal Coil Voltage
(VDC)
3
4.5
5
9
12
24

Coil Resistance(Ω) ± 10%Set Voltage**(VDC)

at 20℃

S

64.3

2.25

-

R

64.3

-

2.25

S

145

3.38

-

R

145

-

3.38

S

178

3.75

-

R

178

-

3.75

S

579

6.75

-

R

579

-

6.75

S

1028

9.0

-

R

1028

-

9.0

S

4114

18.0

-

R

4114

-

18.0

140
140
140
140
140
140

* Test by pulse voltage** S : Set coil (pin No.1...(+) , pin No.12...(-) ) R : Reset coil (pin No.6...(+) , pin No.7...(-) )The latch type relays should be initialized at appointed position before using, and should be energized to specific polarity by above polarity to avoid wrong operation.
Any special coil requirement, please contact EM Devices for availability.
36●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EE2 Series
・Non-latch High Insulation (ND) Type
Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%at 20℃
Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

3

45

2.25

0.3

200

4.5

101

3.38

0.45

200

5

125

3.75

0.5

200

9

405

6.75

0.9

200

12

720

9.0

1.2

200

24

2504

18.0

2.4

230

Set Voltage*(VDC)

Reset Voltage*(VDC)

Nominal Operating Power(mW)・Single Coil Latch High Insulation (ND) Type
Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%at 20℃

3

90

2.25

2.25

100

4.5

203

3.38

3.38

100

5

250

3.75

3.75

100

9

810

6.75

6.75

100

12

960

9.0

9.0

150

24

3388

18.0

18.0

170

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power(mW)

・Non-latch High Breakdown Voltage (NKX) Type
Nominal Coil Voltage(VDC)

Coil Resistance(Ω) ± 10%at 20℃

3

39.1

2.25

0.3

230

4.5

88.0

3.38

0.45

230

12

626

9.0

1.2

230

* Test by pulse voltage** S : Set coil (pin No.1...(+) , pin No.12...(-) ) R : Reset coil (pin No.6...(+) , pin No.7...(-) )The latch type relays should be initialized at appointed position before using, and should be energized to specific polarity by above polarity to avoid wrong operation.
Any special coil requirement, please contact EM Devices for availability.

37●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EC2/EE2 Series■ DIMENSIONS mm(inch)
EE2
EE2-..NU, ND

1.35(0.05)

1.0(0.04)

10.0(0.39)max.

5.08
(0.2)

note
2-2.54

5.08
(0.2)

5.08
(0.2)

9.5(0.37)

EE2-..NUH
15(0.59)max.
1.0(0.04)

note
2-2.54(0.1)

5.08
(0.2)

9.0(0.35)

7.5(0.3)max.

5.08(0.20)

General tolerance : +– 0.2 ( +– 0.008)
Dimensions inshow basic size.
NJ type : Leads-2.8 mm (0.11)

Note.

7.5(0.3)max.

10.0(0.39)max.

9.4(0.37) max.
5.08 2.54 2.54 2.54
(0.20)(0.10)(0.10)(0.10)

15(0.59)max.

7.5(0.3)max.

note
2- 2.54(0.1)

5.08
(0.2)

0.25
(0.01)

3.2(0.13)

0.5(0.02)

EE2-..NUX

15(0.59)max.

7.5 (0.30) max.

15.0 (0.59) max.

10.35(0.41)max.

EC2

5.08
(0.2)

Tolerance ±0.2 mm (0.008) unlessotherwise specified.

7.5(0.3)
Note: This pair of pins at the right end
applies to double coil latch type only.

■ RECOMMENDED PAD LAYOUT(bottom view) mm (inch)

2. 54(0.10)

1.0 (0.04)

B

B

A

A

2.54 (0.1)
10.16 (0.4)

2.54 (0.1)
12.7 (0.5)

Non-latch typeand Single coil latch typeDouble coil latch type

TYPE
A
B
EE2-..NU,ND
7.3 (0.287)
3.0 (0.118)
EE2-..NUX,NKX 7.02 (0.276)
2.73 (0.107)
EE2-..NUH
6.29 (0.248)
2.0 (0.079)
Tolerance ±0.1 mm (0.004) unless otherwise
specified.

5×2.54(5×0.1)

Non-latch type and Single coil latch type

1.0 (0.04)

2×2.54(2×0.1)

10– φ 0.8 (0.03)

2. 54(0.10)

4×2.54(4×0.1)

2. 54 (0.1)

8 – φ 0.8 (0.03)

2×2.54(2×0.1)EE2

2. 54 (0.1)

EC2

Double coil latch type

Note: Tolerance ±0.2 mm unless otherwise specified■ SCHEMATICS (bottom view)
EC2

EE2
1

1

3

4

5

1

3

4

5

1

3

4

5

3

4

5

1

3

4

5

Index mark ofrelay direction

12

10

9

8

Non-latch type(not energized position)

S
12

10

9

8

Single coil latch type(reset position)
S : Coil polarity of set (operate)
R : Coil polarity of reset (release)

1

3

4

5

6

12

10

9

8

7

6

R S
R S

S

R

R
12

10

9

8

7

Double coil latch type(reset position)
Can not be driven by reverse
polarity for reverse operation.

Index mark ofrelay direction

12

10

9

8

Non-latch type(not energized position)

12

10

9

Single coil latch type(reset position)

8

Double coil latch type(reset position)
Can not be driven by reverse
polarity for reverse operation.
S : Coil polarity of set (operate)
R : Coil polarity of reset (release)38●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EC2/EE2 Series■ SOLDERING CONDITION (EE2 Series)
IRS Method
Temperature (degree C)
max. 240
220
200
180

Time (sec.)

45 (max. 70)
70 (max. 120)
190 (max. 300)

Note
1. Temperature profile shows printed circuit board surface temperature on the relay terminal portion.
2. Please check the actual soldering condition to use other method except above mentioned temperature profiles.

■ Recommended relay drive conditions
Drive under conditions. If it is impossible, please inquire to EM Devices.
Non-latch type
Single coil latch typeDouble coil latch type

Voltage: within ± 5% of nominal voltage
Square pulse (rise and fall time is rapidly)
Pulse height: within ± 5% of nominal voltage
Pulse width: more than 10 ms

Ambient temperature− 40 〜＋ 85˚C

■ Technical document
Please confirm technical document before use.
It is able to receive a document at EM Devicesʼ World-wide-web site.
(http://www.em-devices.com)
ITEM

TITLE

Data sheet

EC2/EE2 series

Information

EC2/EE2 series technical data

Userʼs manual

Function and note on correct use

Application note

Application circuit of miniature signal relay

39●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EC2/EE2 Series■ ORDERING PART NUMBERS
・EC2 series

OptionTerminal

PackingStandard

Tube

Trimmed lead

Coil Type

Nominal Coil
Voltage (VDC)

Non-latchSingle Coil Latch

3

EC2-3NU

EC2-3SNU

EC2-3TNU

4.5

EC2-4.5NU

EC2-4.5SNU

EC2-4.5TNU

5

EC2-5NU

EC2-5SNU

EC2-5TNU9

EC2-9NU

EC2-9SNU

EC2-9TNU

12

EC2-12NU

EC2-12SNU

EC2-12TNU

24

EC2-24NU

EC2-24SNU

EC2-24TNU

3

EC2-3NJ

EC2-3SNJ

EC2-3TNJ

4.5

EC2-4.5NJ

EC2-4.5SNJ

EC2-4.5TNJ

5

EC2-5NJ

EC2-5SNJ

EC2-5TNJ9

EC2-9NJ

EC2-9SNJ

EC2-9TNJ

12

EC2-12NJ

EC2-12SNJ

EC2-12TNJ

24

EC2-24NJ

EC2-24SNJ

EC2-24TNJ

Nominal Coil
Voltage (VDC)

Non-latch3

EC2-3ND

EC2-3SND

4.5

EC2-4.5ND

EC2-4.5SND

5

EC2-5ND

EC2-5SND9

EC2-9ND

EC2-9SND

12

EC2-12ND

EC2-12SND

24

EC2-24ND

EC2-24SND

Double Coil Latch

・EC2 series High Insulation Type (ND Type)
OptionTerminal

Standard

Packing

Tube

Coil Type
Single Coil Latch

40●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EC2/EE2 Series
・EE2 series
OptionTerminal

Packing

Tube

Standard

TapingTube

Minimum
footprint

TapingTube

High solder joint
reliability

TapingCoil Type

Nominal Coil
Voltage (VDC)

Non-latchSingle Coil Latch

3

EE2-3NU

EE2-3SNU

EE2-3TNU

4.5

EE2-4.5NU

EE2-4.5SNU

EE2-4.5TNU

5

EE2-5NU

EE2-5SNU

EE2-5TNU9

EE2-9NU

EE2-9SNU

EE2-9TNU

12

EE2-12NU

EE2-12SNU

EE2-12TNU

Double Coil Latch

24

EE2-24NU

EE2-24SNU

EE2-24TNU

3

EE2-3NU-L

EE2-3SNU-L

EE2-3TNU-L

4.5

EE2-4.5NU-L

EE2-4.5SNU-L

EE2-4.5TNU-L

5

EE2-5NU-L

EE2-5SNU-L

EE2-5TNU-L

9

EE2-9NU-L

EE2-9SNU-L

EE2-9TNU-L

12

EE2-12NU-L

EE2-12SNU-L

EE2-12TNU-L

24

EE2-24NU-L

EE2-24SNU-L

EE2-24TNU-L

3

EE2-3NUH

EE2-3SNUH

EE2-3TNUH

4.5

EE2-4.5NUH

EE2-4.5SNUH

EE2-4.5TNUH

5

EE2-5NUH

EE2-5SNUH

EE2-5TNUH9

EE2-9NUH

EE2-9SNUH

EE2-9TNUH

12

EE2-12NUH

EE2-12SNUH

EE2-12TNUH

24

EE2-24NUH

EE2-24SNUH

EE2-24TNUH

3

EE2-3NUH-L

EE2-3SNUH-L

EE2-3TNUH-L

4.5

EE2-4.5NUH-L

EE2-4.5SNUH-L

EE2-4.5TNUH-L

5

EE2-5NUH-L

EE2-5SNUH-L

EE2-5TNUH-L

9

EE2-9NUH-L

EE2-9SNUH-L

EE2-9TNUH-L

12

EE2-12NUH-L

EE2-12SNUH-L

EE2-12TNUH-L

24

EE2-24NUH-L

EE2-24SNUH-L

EE2-24TNUH-L

3

EE2-3NUX

EE2-3SNUX

EE2-3TNUX

4.5

EE2-4.5NUX

EE2-4.5SNUX

EE2-4.5TNUX

5

EE2-5NUX

EE2-5SNUX

EE2-5TNUX9

EE2-9NUX

EE2-9SNUX

EE2-9TNUX

12

EE2-12NUX

EE2-12SNUX

EE2-12TNUX

24

EE2-24NUX

EE2-24SNUX

EE2-24TNUX

3

EE2-3NUX-L

EE2-3SNUX-L

EE2-3TNUX-L

4.5

EE2-4.5NUX-L

EE2-4.5SNUX-L

EE2-4.5TNUX-L

5

EE2-5NUX-L

EE2-5SNUX-L

EE2-5TNUX-L

9

EE2-9NUX-L

EE2-9SNUX-L

EE2-9TNUX-L

12

EE2-12NUX-L

EE2-12SNUX-L

EE2-12TNUX-L

24

EE2-24NUX-L

EE2-24SNUX-L

EE2-24TNUX-L

Nominal Coil
Voltage (VDC)

Non-latch3

EE2-3ND

EE2-3SND

4.5

EE2-4.5ND

EE2-4.5SND

5

EE2-5ND

EE2-5SND9

EE2-9ND

EE2-9SND

12

EE2-12ND

EE2-12SND

・EE2 series High Insulation Type (ND Type)
OptionTerminal

Packing

Tube

Standard

TapingCoil Type
Single Coil Latch

24

EE2-24ND

EE2-24SND

3

EE2-3ND-L

EE2-3SND-L

4.5

EE2-4.5ND-L

EE2-4.5SND-L

5

EE2-5ND-L

EE2-5SND-L

9

EE2-9ND-L

EE2-9SND-L

12

EE2-12ND-L

EE2-12SND-L

24

EE2-24ND-L

EE2-24SND-L

41●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

ED2 Series

The ED2 series has reduced coil power consumption but sustained high-performance of NEXEM SIGNAL RELAYS. Furthermore, it complies
with 2500 V surge-voltage requirement of Telcordia specifications.

■ FEATURES

・Low power consumption (50 to 70 mW)
・Compact and light weight・2 Form C contact arrangement
・Reduced mounting space: 15 mm × 7.5 mm
・High-breakdown voltage of coil to contacts:
1500 VAC, 2500 V (2 × 10μs*3)
・UL recognized (E73266), CSA certified (LR46266), TÜV certified (R9950557)■ SPECIFICATIONSContact Form

2 Form C

Contact Material

Contact Ratings

Silver alloy with gold alloy overlay
Maximum Switching Power

30 W, 62.5VA

Maximum Switching Voltage

220 VDC, 250 VAC

Maximum Switching Current

1A

Maximum Carrying Current

2A
10 mVDC, 10μA*1

Minimum Contact Ratings
Initial Contact ResistanceNominal Operating Power75 mΩ max. (Initial)
Non-latch type50 mW (1.5 to 5 V), 55 mW (9 V), 60 mW (12 V), 70 mW (24 V)

Operate Time (Excluding bounce)

Approx. 3 ms

Release Time (Excluding bounce)

Approx. 2 ms (without diode)

Insulation Resistance1000 MΩ at 500 VDC
Between open contacts

Withstand Voltage

Between adjacent contacts
Between coil to contacts

1000 VAC (for one minute)1500 V surge (10 × 160μs*2)
1500 VAC (for one minute)2500 V surge (2 × 10μs*3)

Shock Resistance

735 m/s2 (misoperation), 980 m/s2 (destructive failure)

Vibration Resistance

10 to 55 Hz, double amplitude 3 mm (misoperation)
10 to 55 Hz, double amplitude 5 mm (destructive failure)

Ambient Temperature− 40 to ＋ 85˚C

Coil Temperature Rise
Running Specifications
Weight7 degrees at nominal coil voltage (50 mW)
Non-load

1 × 108 *4 operations (Non-latch type) 1 × 107 operations (latch type)

Load

50 VDC, 0.1 A (resistive) 1 × 106 operations at 85˚C, 5 Hz
10 VDC, 10 mA (resistive) 1 × 106 operations at 85˚C, 2 Hz
Approx. 2.2 g*1 This value is a reference value in the resistive load.
Minimum capacity changes depending on switching frequency and environment temperature and the load.
*2 Rise time : 10μs, decay time to half crest : 160μs*3 Rise time : 2μs, decay time to half crest : 10μs
*4 This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of operation by which a
steady characteristic is maintained is 1 × 107 operations.

42●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

ED2 Series■ PART NUMBER SYSTEM■ SAFETY STANDARD AND RATING

ED2-3NUUL Recognized(UL508)File No. E73266

NU: Standard type
NJ: Trimmed leads type

CSA Certificated(CSA C22.2 No14)
File No. LR46266

30 VDC, 1 A(Resistive)
110 VDC, 0.3 A (Resistive)
125 VAC, 0.5 A (Resistive)

Nominal coil voltage (See part numbers)

TÜV Certified(EN61810)
No. R9950557
Non-latch and Single-coil-latch
Creepage and clearance of coil to contact is over than 2 mm.
(According to EN60950)
Basic insulation class■ COIL SPECIFICATIONS・Non-latch Type

Nominal Coil Voltage(VDC)

at 20℃
Coil Resistance(Ω) ± 10%

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

1.5

45

1.13

0.15

50

3

180

2.25

0.3

50

4.5

405

3.38

0.45

50

5

500

3.75

0.5

50

9

1473

6.75

0.9

55

12

2400

9.0

1.2

60

24

8229

18.0

2.4

70

* Test by pulse voltage

43●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EF2 Series

The EF2 series is surface-mounting type sustaining high-performance of NEXEM ED2 series.

■ FEATURES

・Low power consumption(50 to 70 mW)
・Compact and light weight・2 Form C contact arrangement
・Reduced mounting space: 15 mm × 9.5 mm
・High-breakdown voltage of coil to contacts: 1500 VAC, 2500 V, (2 × 10μs*3)
・UL recognized (E73266), CSA certified (LR46266), TÜV certified (R9950557)■ SPECIFICATIONSContact FormContact Material
Maximum Switching Power
Contact Ratings

Maximum Switching Voltage
Maximum Switching Current
Maximum Carrying Current

Minimum Contact Ratings
Initial Contact ResistanceNominal Operating Power

Non-latch typeOperate Time (Excluding bounce)
Release Time (Excluding bounce)
Insulation Resistance
Between open contacts
Withstand Voltage

Between adjacent contacts
Between coil to contacts

Shock ResistanceVibration ResistanceAmbient Temperature
Coil Temperature Rise
Non-load
Running Specifications
WeightLoad

2 Form C
Silver alloy with gold alloy overlay
30 W, 62.5 VA
220 VDC, 250 VAC
1A
2A
10 mVDC, 10μA*1
75 mΩ max. (Initial)
50 mW (1.5 to 5 V), 55 mW (9 V), 60 mW (12 V), 70 mW (24 V)
Approx. 2 ms
Approx. 1 ms (without diode)1000 MΩ at 500 VDC1000 VAC (for one minute)1500 V surge (10 × 160μs*2)
1500 VAC (for one minute)2500 V surge (2 × 10μs*3)
735 m/s2 (misoperation), 980 m/s2 (destructive failure)
10 to 55 Hz, double amplitude 3 mm (misoperation)
10 to 55 Hz, double amplitude 5 mm (destructive failure)− 40 to ＋ 85℃
7 degrees at nominal coil voltage (50 mW)
1 × 108 *4 operations (Non-latch type) 1 × 107 operations (latch type)
50 VDC, 0.1 A (resistive) 1 × 106 operations at 85℃ , 5 Hz
10 VDC, 10 mA (resistive) 1 × 106 operations at 85℃ , 2 Hz
Approx. 2.2 g*1 This value is a reference value in the resistive load.
Minimum capacity changes depending on switching frequency and environment temperature and the load.
*2 Rise time : 10μs, decay time to half crest : 160μs*3 Rise time : 2μs, decay time to half crest : 10μs
*4 This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of operation by which a
steady characteristic is maintained is 1 × 107 operations.

44●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EF2 Series■ PART NUMBER SYSTEM
EF 2-3NU-L■ SAFETY STANDARD AND RATINGUL Recognized(UL508)File No. E73266

Packing
Nil: Tube
L: Embossed carrying tape (L type)

CSA Certificated(CSA C22.2 No14)
File No. LR46266

30 VDC, 1 A(Resistive)
110 VDC, 0.3 A (Resistive)
125 VAC, 0.5 A (Resistive)

NU: Standard type
NUH: Minimum footprint type
NUX: High solder joint reliability type
Nominal coil voltage (See part numbers)

TÜV Certified(EN61810)
No. R9950557
Non-latch and Single-coil-latch
Creepage and clearance of coil to contact is over than 2 mm.
(According to EN60950)
Basic insulation class■ COIL SPECIFICATIONS・Non-latch Type

Nominal Coil Voltage(VDC)

at 20℃
Coil Resistance(Ω) ± 10%

Must Operate Voltage*(VDC)

Must Release Voltage*(VDC)

Nominal Operating Power
(mW)

1.5

45

1.13

0.15

50

3

180

2.25

0.3

50

4.5

405

3.38

0.45

50

5

500

3.75

0.5

50

9

1473

6.75

0.9

55

12

2400

9.0

1.2

60

24

8229

18.0

2.4

70

* Test by pulse voltage

45●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

ED2/EF2 Series■ DIMENSIONS mm(inch)
EF2

EF2-..NU

EF2-..NUX

0.25(0.01)

7.5(0.3)max.
1.35(0.05)

5.08
(0.2)

2- 2.54(0.1)

5.08
(0.2)

2-2.549.5(0.37)

5.08
(0.2)
9.0(0.35)

EF2-..NUH
15(0.59)max.

7.5(0.3)max.
1.0(0.04)

5.08(0.20)

General tolerance : +– 0.2 ( +– 0.008)
Dimensions inshow basic size.
NJ type : Leads-2.8 mm (0.11)

15(0.59)max.

5.08
(0.2)

10.0(0.39)max.

9.4(0.37) max.
5.08 2.54 2.54
(0.20)(0.10)(0.10)
Note.

5.08
(0.2)

3.2
(0.13)

0.5(0.02)

1.0(0.04)

7.5 (0.30) max.

15.0 (0.59) max.

7.5(0.3)max.
10.0(0.39)max.

15(0.59)max.

10.35(0.41)max.

ED2

5.08
(0.2)

2-2.54(0.1)

7.5(0.3)
Tolerance ±0.2 mm (0.008) unlessotherwise specified.

■ RECOMMENDED PAD LAYOUT(bottom view) mm (inch)

ED2

EF2

1.0 (0.04)

2×2.54(2×0.1)

8 – φ 0.8 (0.03)

2. 54 (0.1)

BA

2.54 (0.1)
10.16 (0.4)
Non-latch typeand Single coil latch type

2. 54
(0.10)

4×2.54(4×0.1)
Note: Tolerance ±0.2 mm unless otherwise specified

TYPE
A
B
EF2-..NU
7.3 (0.287)
3.0 (0.118)
EF2-..NUX
7.02 (0.276)
2.73 (0.107)
EF2-..NUH
6.29 (0.248)
2.0 (0.079)
Tolerance ±0.1 mm (0.004) unless otherwise
specified.

■ SCHEMATICS (bottom view)
ED2

EF2

Index mark ofrelay direction

1

3

4

5

12

10

9

8

(not energized position)

Index mark ofrelay direction

1

3

4

5

12

10

9

8

(not energized position)

46●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

ED2/EF2 Series■ SOLDERING CONDITION (EF2 Series)
IRS Method
Temperature (degree C)
max. 240
220
200
180

Time (sec.)

45 (max. 70)
70 (max. 120)
190 (max. 300)

Note
1. Temperature profile shows printed circuit board surface temperature on the relay terminal portion.
2. Please check the actual soldering condition to use other method except above mentioned temperature profiles.

■ Recommended relay drive conditions
Drive under conditions. If it is impossible, please inquire to EM Devices.
Non-latch type

Voltage: within ± 5% of nominal voltage

Ambient temperature− 40 〜＋ 85˚C

■ Technical document
Please confirm technical document before use.
It is able to receive a document at EM Devicesʼ World-wide-web site.
(http://www.em-devices.com)
ITEM

TITLE

Data sheet

ED2/EF2 series

Information

ED2/EF2 series technical data

Userʼs manual

Function and note on correct use

Application note

Application circuit of miniature signal relay

47●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

ED2/EF2 Series■ ORDERING PART NUMBERS
・ED2 series

OptionTerminal

PackingStandard

Tube

Trimmed lead

Nominal Coil
Voltage (VDC)
1.5
3
4.5
5
9
12
24
1.5
3
4.5
5
9
12
24

Coil Type
Non-latch
ED2-1.5NU
ED2-3NU
ED2-4.5NU
ED2-5NU
ED2-9NU
ED2-12NU
ED2-24NU
ED2-1.5NJ
ED2-3NJ
ED2-4.5NJ
ED2-5NJ
ED2-9NJ
ED2-12NJ
ED2-24NJ

Nominal Coil
Voltage (VDC)
1.5
3
4.5
5
9
12
24
1.5
3
4.5
5
9
12
24
1.5
3
4.5
5
9
12
24
1.5
3
4.5
5
9
12
24
1.5
3
4.5
5
9
12
24
1.5
3
4.5
5
9
12
24

Coil Type
Non-latchEF2-1.5NU
EF2-3NU
EF2-4.5NU
EF2-5NU
EF2-9NU
EF2-12NU
EF2-24NU
EF2-1.5NU-L
EF2-3NU-L
EF2-4.5NU-L
EF2-5NU-L
EF2-9NU-L
EF2-12NU-L
EF2-24NU-L
EF2-1.5NUH
EF2-3NUH
EF2-4.5NUH
EF2-5NUH
EF2-9NUH
EF2-12NUH
EF2-24NUH
EF2-1.5NUH-L
EF2-3NUH-L
EF2-4.5NUH-L
EF2-5NUH-L
EF2-9NUH-L
EF2-12NUH-L
EF2-24NUH-L
EF2-1.5NUX
EF2-3NUX
EF2-4.5NUX
EF2-5NUX
EF2-9NUX
EF2-12NUX
EF2-24NUX
EF2-1.5NUX-L
EF2-3NUX-L
EF2-4.5NUX-L
EF2-5NUX-L
EF2-9NUX-L
EF2-12NUX-L
EF2-24NUX-L・EF2 series
OptionTerminal

Packing

Tube

Standard

TapingTube

Minimum
footprint

TapingTube

High solder joint
reliability

Taping48●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EU2 Series
The new NEXEM EU2 series is PC-board mount automotive relay suitablefor various motor and solenoid control application. The EU2 series isultra low profile SMD relays. The EU2 series is succeeding in about 77%
of low profiling in comparison with the ET2 series.

■ FEATURES■ DIMENSIONS mm

8.5 max.

・Ultra miniature twin relay
・Low profile SMD relay
・Approx. 77% relay height of ET2・Approx. 60% relay height of EX2

3.21

4.505

5.27
2.6

4.505
2.6

2.6

8-0.8

12.2

2.6

0.2
14.0 max. (before soldering)
14.5 max. (after soldering)

0.4

21.0 max.

4-1.0
3.0
1.375

3.0

4-0.452.975 3.525 3.275 2.975 3.525■ RECOMMENDED PCB PAD LAYOUT and SCHEMATICS(top view) mm
0.95

0.95 0.95

3.1

0.95

15.0

4.0

16 15 14 13 12 11 10

4.0

2.975 3.525 3.275 2.975 3.525

1.835
4.505

5.27

Side ASide B

4.505

3.0

1 2
3.6

3.6

9

3.6

3 4

5 6

7 8

3.6

49

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EU2 Series■ SPECIFICATIONS
Items

Specifications
1 Form C × 2 (separate)

Contact FormContact Rating Power
Contact Ratings

14 VDC, 25A

Maximum Switching Current

30 A

Minimum Switching Current

1 A (5 VDC)

Contact Resistance4 mΩ typical (measured at 7 A) initial

Contact Material

Silver oxide complex alloy

Operate Time (Excluding bounce)

2.5 ms typical (at Nominal Voltage)

Release Time (Excluding bounce)

3 ms typical (at Nominal Voltage, with diode)

Nominal Operating Power

960 mW

Insulation ResistanceWithstand Voltage
Shock ResistanceVibration Resistance

100 MΩ at 500 VDC
Between open contacts

500 VAC min. (for 1 minute)

Between coil and contacts

500 VAC min. (for 1 minute)Misoperation

98 m/s2

Destructive Failure

980 m/s2
10 to 300 Hz, 43 m/s2

Misoperation

10 to 500 Hz, 43 m/s2, 200 hours

Destructive Failure–40 to ＋ 85˚C

Ambient Temperature

1 × 106 operations

Non-load
Running Specifications

100 × 103 operations (at 14 VDC, Motor Load 25 A)
100 × 103 operations (at 14 VDC, Motor Load 25 A/5 A)

Load

WeightApprox. 6 g■ COIL RATING

at 20℃

Part Numbers

NominalVoltage(VDC)

CoilResistance(Ω) ± 10 %Must
Operate Voltage
(VDC)

Must
Release Voltage(VDC)

EU2-2U1SN

12

150

6.5

0.6

* Test by pulse voltage■ PART NUMBER SYSTEM
EU2- 2 U 1 SN - T
TypePacking

T: Embossed carrying tape

EnclosureSN : Sealed

Must Operate Voltage

1

Contact Material

U : Silver oxide complex alloy

Coil Resistance2: 6.5VDC: 150 Ω50

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EX2 Series
The NEXEM EX2 series is PC-board mount automotive relay suitablefor various motor control applications that require a high quality
and performance. The EX2 series is succeeding in about 75% of
miniaturization in comparison with the ET2 series.

■ DIMENSIONS mm
13.6 ± 0.5

12.1 ± 0.5

3.4*4－0.4×0.7*2－0.4×1.1

3.95 3.4
3.4

0.75

6.05

5.25

5.35

6.05

0.75

4.55

5.25

3.4 3.35

5.35 3.95

*3.2

0.9

・Ultra miniature twin relay
・Flux tight housing・Approx. 75% relay volume of ET2・Approx. 60% relay space of ET2・Approx. 88% relay weight of ET2

13.7±0.5■ FEATURES*After solder dipping*4－0.6×1.1■ RECOMMENDED PCB PAD LAYOUT and SCHEMATICS(bottom view) mm

2-ø1.1 +0.1
-0
No. 3, 84-ø1.5
No. 1, 5, 6, 10+0.1-02-ø0.9 +0.1
-0
No. 2, 74
3

2-ø1.4
No. 4, 9

+0.1
-0

6

7

10

8
9

5

1
2
(Unit A)

(Unit B)

These hole dimensions are recommended value for prevention from reverse insertion
at manual mounting.

51●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EX2 Series■ SPECIFICATIONS
Items

Specifications
1 Form C × 2 (separate)

Contact FormContact Rating Power

14 VDC, 25A

Maximum Switching Current

Contact Ratings

30 A (at 16 VDC, Resistive load)

Minimum Switching Current

1A (5 VDC)

Contact Resistance4 mΩ typical (measured at 7 A) initial

Contact Material

Silver oxide complex alloy

Operate Time (Excluding bounce)

2.5 ms typical (at Nominal Voltage)

Release Time (Excluding bounce)

3 ms typical (at Nominal Voltage, with diode)

Nominal Operating Power

900 mW

Insulation Resistance

100 MΩ at 500 VDCWithstand Voltage
Shock Resistance

Between open contacts

500 VAC min. (for 1 minute)

Between coil and contacts

500 VAC min. (for 1 minute)Misoperation

98 m/s2

Destructive Failure

980 m/s2
10 to 300 Hz, 43 m/s2

Misoperation

Vibration Resistance

10 to 500 Hz, 43 m/s2, 200 hour

Destructive Failure− 40 to ＋ 125℃

Ambient Temperature

1 × 106 operations

Non-load
Running Specifications

100 × 103 operations (at 14 VDC, Motor Load 25 A)
100 × 103 operations (at 14 VDC, Motor Load 25 A/5 A)

Load

WeightApprox. 6.5 g■ COIL RATING・Sealed Typeat 20℃

Part Numbers

NominalVoltage(VDC)

CoilResistance(Ω) ± 10 %Must
Operate Voltage
(VDC)

Must
Release Voltage(VDC)

EX2-2U1S

12

160

6.5

0.9

Part Numbers

NominalVoltage(VDC)

CoilResistance(Ω) ± 10 %Must
Operate Voltage
(VDC)

Must
Release Voltage(VDC)

EX2-2U1

12

160

6.5

0.9

* Test by pulse voltage

・Unsealed Typeat 20℃* Test by pulse voltage■ PART NUMBER SYSTEM
EX2- 2 U 1 S
Enclosure

Nil : Unsealed
S : Sealed

Must Operate Voltage

1 : 6.5 V

Contact Material

U : Silver oxide complex alloy

Coil Resistance2 : 160 Ω

Type

52

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EX1 Series
The NEXEM EX1 series is PC-board mount automotive relay suitable for various motor
control applications that require a high quality and performance. The EX1 series is
succeeding in about 65% of miniaturization in comparison with the ET1 series.

■ DIMENSIONS mm
12.1±0.5

7.5±0.5∗3.2

0.9

・Ultra miniature single relay
・Flux tight housing・Approx. 65% relay volume of ET1・Approx. 50% relay space of ET1・Approx. 78% relay weight of ET1

13.7±0.5■ FEATURES∗After soldering

0.35
3.0

2.2

2.3

∗2-0.6×1.1∗0.4×1.1

3.95 3.4
4.55

5.35

∗2-0.4×0.7■ RECOMMENDED PCB PAD LAYOUT and SCHEMATICS(bottom view) mm

5

+0.1

3-ø1.5 –0+0.1

2-ø1.1–0

4

1
3

2

53

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EX1 Series■ SPECIFICATIONS
Items

Specifications

Contact Form

1 Form C
Contact Rating Power

14 VDC, 25A

Maximum Switching Current

Contact Ratings

30 A (at 16 VDC, Resistive load)

Minimum Switching Current

1A (5 VDC)

Contact Resistance4 mΩ typical (measured at 7 A) initial

Contact Material

Silver oxide complex alloy

Operate Time (Excluding bounce)

2.5 ms typical (at Nominal Voltage)

Release Time (Excluding bounce)

3 ms typical (at Nominal Voltage, with diode)

Nominal Operating Power

900 mW

Insulation Resistance

100 MΩ at 500 VDCWithstand Voltage
Shock Resistance

Between open contacts

500 VAC min. (for 1 minute)

Between coil and contacts

500 VAC min. (for 1 minute)Misoperation

98 m/s2

Destructive Failure

980 m/s2
10 to 300 Hz, 43 m/s2

Misoperation

Vibration Resistance

10 to 500 Hz, 43 m/s2, 200 hour

Destructive Failure− 40 to ＋ 125℃

Ambient Temperature

1 × 106 operations

Non-load
Running Specifications

100 × 103 operations (at 14 VDC, Motor Load 25 A)
100 × 103 operations (at 14 VDC, Motor Load 25 A / 5 A)

Load

WeightApprox. 3.5 g■ COIL RATING・Sealed Typeat 20℃

Part Numbers

NominalVoltage(VDC)

CoilResistance(Ω) ± 10 %Must
Operate Voltage
(VDC)

Must
Release Voltage(VDC)

EX1-2U1S

12

160

6.5

0.9

Part Numbers

NominalVoltage(VDC)

CoilResistance(Ω) ± 10 %Must
Operate Voltage
(VDC)

Must
Release Voltage(VDC)

EX1-2U1

12

160

6.5

0.9

* Test by pulse voltage

・Unsealed Typeat 20℃* Test by pulse voltage■ PART NUMBER SYSTEM
EX1- 2 U 1 S
Enclosure

Nil : Unsealed
S : Sealed

Must Operate Voltage

1 : 6.5 V

Contact Material

U : Silver oxide complex alloy

Coil Resistance2 : 160 Ω

Type

54

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

ET2 Series

The NEXEM ET2 series is PC-board mount automotive relay suitable for various motor control applications that require ahigh quality and performance. The ET2 series is succeeding in about 50% of miniaturization in comparison with the EP2
series. This is H bridge type which is designed for forward and reverse control of the motor.
*ET2F:High heat resistivity■ FEATURES■ DIMENSIONS mm (inch)

・Miniature twin relay
・Flux tight housing・Approx. 50% relay volume of EP2
・Approx. 74% relay space of EP2
・Approx. 67% relay height of EP2
・Approx. 50% relay weight of EP2

12.8±0.5(0.50)

9.87(0.39)
7.3(0.29)(0.41)∗

5.25 4.35(0.21) (0.17)

4.35 2.95(0.17) (0.12)
6.4
6.4(0.25) (0.25)

3.6 (0.14)
1.0 (0.04)

0.4 (0.016)
3.6 (0.14)
2-0.6×1.1(0.023×0.043)

10.5±0.5

3.8 +1.0-0.5(0.15)

0.5 (0.02)

22.0±0.5(0.87)∗After soldering2-0.4×1.3(0.016×0.051)

7.3 (0.29)
9.87 (0.39)

11.0(0.43)

11.0(0.43)

4-ø0.6(0.063)■ RECOMMENDED PCB PAD LAYOUT and SCHEMATICS(bottom view) mm (inch)

36(0.14)

4.35 2.95(0.17) (0.12)

5.25 4.35(0.21) (0.17)

10 (0.04)

2-ø1.5 +0.1
-0(ø0.059)

6.4(0.25)

4-ø1.1 +0.1
-0(ø0.043)

0.4 (0.016)

3.6 (0.14)

3

4

5［Unit A］

7.3 (0.29)
9.87 (0.39)

11.0(0.43)

2
1

6.4(0.25)

9.87(0.39)
7.3 (0.29)

6

7

8

［Unit B］

2-ø1.6 +0.1
-0(ø0.063)

11.0(0.43)

55●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

ET2 Series■ SPECIFICATIONSSpecifications

Items

ET2
1 Form C × 2 (H Bridge)

Contact FormContact Rating Power
Maximum Switching Current
Contact Ratings

Max. Carrying Current
Min. Switching Current
Contact ResistanceContact Material
Operate Time (Excluding bounce)
Release Time (Excluding bounce)
Nominal Operating Power
Insulation Resistance
Between open contacts
Withstand Voltage
Between coil and contacts
Misoperation
Shock Resistance
Destructive Failure
Misoperation
Vibration Resistance
Destructive Failure
Ambient Temperature
Coil Temperature Rise
Non-load
Running Specifications
Load
WeightET2F
1 Form C × 2 (H Bridge)

14 VDC, 20A
25 A (at 16 VDC, Resistive load)
25 A (2 minutes 12 VDC at 125℃ )25 A (2 minutes 12 VDC at 85℃ )30 A (2 minutes 12 VDC at 85℃ )30 A (2 minutes 12 VDC at 20℃ )35 A (2 minutes 12 VDC at 20℃ )1A (at 5 VDC)
4 mΩ typical (measured at 7 A) initial
Silver oxide complex alloy
2.5 ms typical (at Nominal Voltage)
3 ms typical (at Nominal Voltage, without diode)
640 mW
100 MΩ at 500 VDC
500 VAC min. (for 1 minute)
500 VAC min. (for 1 minute)98 m/s2
980 m/s2
10 to 300 Hz, 43 m/s2
10 to 500 Hz, 43 m/s2, 200 hour
− 40 to ＋ 85℃− 40 to ＋ 125℃
70℃ / W
1 × 106 operations
100 × 103 operations (at 14 VDC, Motor Load 20 A)
100 × 103 operations (at 14 VDC, Motor Load 20 A / 3 A)
Approx. 7.5 g (0.26 oz)■ COIL RATING・Sealed Typeat 20℃

Part Numbers
ET2-B3M1S

ET2F-B3M1S

NominalVoltage
(VDC)
12

Coil
Resistance(Ω) ± 10 %
225

Must
Operate Voltage*
(VDC)
6.5

Must
Release Voltage*
(VDC)
0.9

NominalVoltage
(VDC)
12

Coil
Resistance(Ω) ± 10 %
225

Must
Operate Voltage*
(VDC)
6.5

Must
Release Voltage*
(VDC)
0.9

* Test by pulse voltage

・Unsealed Typeat 20℃

Part Numbers
ET2-B3M1

ET2F-B3M1* Test by pulse voltage■ PART NUMBER SYSTEMET2 F- B 3 M 1 S
Enclosure

Nil : Unsealed
S : Sealed

Must Operate Voltage

1 : 6.5 V

Contact Material

M : Silver oxide complex alloy

Coil Resistance3 : 225 Ω

Carrying Current capacity

B : Standard type

Ambient temperature

Nil : Standard (-40 to +85ºC)
F : High heat resistivity (-40 to +125ºC)

Type

56

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

ET1 Series

The NEXEM ET1 series is PC-board mount automotive relay suitable for various motor and heater control applications that
require a high quality and performance. The ET1 series is succeeding in about 50% of miniaturization in comparison with
the EP1 series.
*ET1F:High heat resistivity■ FEATURES■ DIMENSIONS mm (inch)

・Miniature single relay
・Flux tight housing・Approx. 50% relay volume of EP1・Approx. 76% relay space of EP1・Approx. 67% relay height of EP1・Approx. 56% relay weight of EP1

12.8±0.5(0.50)

1.15(0.045)(0.41)

10.5±0.5∗

0.4×1.3(0.016×0.051)

9.35(0.37)

6.4(0.25)

2.05(0.081)+1.0

3.8 –0.5(0.15)

0.5 (0.02)

14.0±0.5(0.57)

2-ø0.6(0.023)2-0.6×1.1(0.023×0.043)

1.13 (0.044)∗After soldering

3.7 (0.145)
7.4 (0.29)
10.6 (0.42)
12.0 (0.472)■ RECOMMENDED PCB PAD LAYOUT and SCHEMATICS

1.15(0.045)

ø1.6 +0.1-0(ø0.063)

6.4(0.25)

9.35(0.37)

2.05(0.081)(bottom view) mm

2-ø1.1 +0.1
-0(ø0.043)2-ø1.5 +0.1
-0(ø0.059)2
1

1.13(0.044)
3.7(0.145)

4

3

5

7.4(0.29)
10.6(0.42)
12.0(0.472)

57●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

ET1 Series■ SPECIFICATIONSSpecifications

Items

ET1

ET1F

Contact Form

1 Form C

Contact Rating Power
Maximum Switching Current
Contact Ratings

Max. Carrying Current
Min. Switching Current
Contact Resistance

14 VDC, 20A
25 A (at 16 VDC, Resistive load)
30 A (2 minutes 12 VDC at 125℃ )30 A (2 minutes 12 VDC at 85℃ )35 A (2 minutes 12 VDC at 85℃ )35 A (2 minutes 12 VDC at 20℃ )40 A (2 minutes 12 VDC at 20℃ )1A (at 5 VDC)
4 mΩ typical (measured at 7 A) initial

Contact Material
Operate Time (Excluding bounce)
Release Time (Excluding bounce)
Nominal Operating Power
Insulation Resistance
Between open contacts
Withstand Voltage
Between coil and contacts
Misoperation
Shock Resistance
Destructive Failure
Misoperation
Vibration Resistance
Destructive Failure
Ambient Temperature
Coil Temperature Rise
Non-load
Running Specifications
Load

Silver oxide complex alloy
2.5 ms typical (at Nominal Voltage)
3 ms typical (at Nominal Voltage, without diode)
640 mW
100 MΩ at 500 VDC
500 VAC min. (for 1 minute)
500 VAC min. (for 1 minute)98 m/s2 (10 G)
980 m/s2 (100 G)
10 to 300 Hz, 43 m/s2
10 to 500 Hz, 43 m/s2, 200 hour
− 40 to ＋ 85℃− 40 to ＋ 125℃
70℃ / W

1 × 106 operations
100 × 103 operations (at 14 VDC, Motor Load 20 A)
100 × 103 operations (at 14 VDC, Motor Load 20 A / 3 A)
Approx. 4.5 g (0.16 oz)

Weight■ COIL RATING・Sealed Typeat 20℃

Part Numbers
ET1-B3M1S

ET1F-B3M1S

NominalVoltage
(VDC)
12

Coil
Resistance(Ω) ± 10 %
225

Must
Operate Voltage*
(VDC)
6.5

Must
Release Voltage*
(VDC)
0.9

NominalVoltage
(VDC)
12

Coil
Resistance(Ω) ± 10 %
225

Must
Operate Voltage*
(VDC)
6.5

Must
Release Voltage*
(VDC)
0.9

* Test by pulse voltage

・Unsealed Typeat 20℃

Part Numbers
ET1-B3M1

ET1F-B3M1* Test by pulse voltage■ PART NUMBER SYSTEMET1 F- B 3 M 1 S
Enclosure

Nil : Unsealed
S : Sealed

Must Operate Voltage

1 : 6.5 V

Contact Material

M : Silver oxide complex alloy

Coil Resistance3 : 225 Ω

Carrying Current capacity

B : Standard type

Ambient temperature

Nil : Standard (-40 to +85ºC)
F : High heat resistivity (-40 to +125ºC)

Type

58

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EP2 Series

Now, these products are corresponding
only to specific customers.

Non-promotion

EP2 series is printed circuit board mount type and the most suitable for various motor controls in the automotive which
require high-quality and high-performance.
EP2 series has two types for different applications. One is H bridge type which is designed for forward and reverse control of the motor.
The other is separate type which contains two separated relays in one package.
*EP2F:High heat resistivity■ FEATURES

・Twin relay for motor reversible control
・High performance & productivity byunique symmetrical structure
・PC board mounting
・Flux tight housing■ DIMENSIONS mm (inch)[Separate (T) Type]

(0.4)

10.1

11.9∗
(0.47)

11.9∗[H Bridge Type]

2– φ 1.5 +0.1
–0
( φ 0.059)

4 – φ 1.1 +0.1
–0
( φ 0.043)

2– φ 1.9 +0.1
–0
( φ 0.075)(0.4)

11.9 ∗(0.47)

5(Side A)7

10.1
11.9 ∗(0.47)

Not energized position

8.1∗(0.32)∗ For reference∗∗ After soldering(bottom view) mm (inch)[Separate (T) Type]4 – φ 1.5 +0.1
–0
( φ 0.059)
2 3

9
4
10

8

(side B)

(0.32)

6.4

4 – φ 0.6
( φ 0.02)

1

6(0.25)

3.1 (0.12)

5.45 (0.21)

2 –1.3×1.3 (0.05×0.05)

8.0

3
4

1

(0.15)

0.5 (0.02)(0.31)

Tolerance ±0.2 mm(0.008) unlessotherwise specified∗ For reference∗∗ After soldering2

4 – 0.5×1.1 (0.02×0.04)
2.2 (0.09)(0.12)

3.1(0.14) 3.5■ RECOMMENDED PCB PAD LAYOUT and SCHEMATICS

4– φ 1.1 +0.1
–0
( φ 0.043)(0.31)

2.2

4– φ 0.6( φ 0.02)(0.47)(0.4)

3.5(0.14)(0.09)

6.4 (0.25)
5.45 (0.21)(0.32)

8.1∗(0.32)

8.1∗

8.0

2–1.3×1.3 (0.05×0.05)

8.0

16.0±0.5(0.63)
3.8(0.15)

5.45 (0.21)

2.2(0.09)

5.45(0.25)

3.1 (0.12)
2.2 (0.09)(0.21)

Tolerance ±0.2 mm(0.008) unlessotherwise specified

10.1

2–0.5×1.1(0.02×0.04)(0.31)

3.5(0.14)(0.14) 3.5(0.31)

∗∗

6.4

8.0

(0.4)

16.2±0.5(0.64)

16.0±0.5(0.63)
3.8

∗∗
10.1

23.8±0.5(0.94)

16.2±0.5(0.64)

0.5 (0.02)

23.8±0.5(0.94)

8.1∗[H Bridge Type]5 6

2 – φ 1.9 +0.1
–0
( φ 0.075)(Unit A)

8
7

(Unit B)Not energized position

59●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EP2 Series■ SPECIFICATIONS

at 20℃
Types (Contact Rating)

EP2(Standard)

Items

EP2-B
(High Current)

Contact Form

1 Form C × 2 (H Bridge Type or Separate Type)Contact Material

Silver oxide complex alloy (Special type available)
H Bridge (route A) : 10.7 mΩ typ.
H Bridge (route B) : 10.4 mΩ typ.
Separate (N/C) : 5.2 mΩ typ.
Separate (N/O) : 5.2 mΩ typ.
(measured by voltage drop at 6 VDC, 7 A)

Initial Contact Resistance★
figure 1.
Contact Rating PowerH Bridge (route A) : 6.7 mΩ typ.
H Bridge (route B) : 6.4 mΩ typ.
Separate (N/C) : 3.2 mΩ typ.
Separate (N/O) : 3.2 mΩ typ.
(measured by voltage drop at 6 VDC, 7 A)

14 VDC, 25A

Contact Switching Current

30 A max. (at 16 VDC)
20 A max. (1 hour max.)
25 A Max. (2 minutes Max.) at 12 VDCContact Carrying Current

25 A max. (1 hour max.)
30 A Max. (2 minutes Max.) at 12 VDC

Operate Time (Excluding bounce)

Approx. 5 ms (at Nominal Voltage)

Release Time (Excluding bounce)

Approx. 2 ms (at Nominal Voltage, without diode)

Nominal Operate Power

0.48 W/ 0.64 W (at 12 VDC)

Insulation Resistance

100 MΩ at 500 VDCWithstand Voltage

500 VAC (for 1 minute)Shock Resistance

98 m/s2 (misoperation), 980 m/s2 (destructive failure)

Vibration Resistance

10 to 300 Hz, 43 m/s2 (misoperation),
10 to 500 Hz, 43 m/s2 , 200 hours (destructive failure)

Ambient Temperature− 40 to ＋ 85℃ ( − 40 to ＋ 185℉ )Coil Temperature Rise

50℃ / W (90 ℉ /W) (Contact Carrying Current : 0 A)
1 × 106 operations

Non-load

Running Specifications

100 × 103 operations (at 14 VDC, Motor Load 25 A / 5 A)

Load

WeightApprox. 15 g (0.53 oz)■ COIL RATING

at 20℃

H Bridge Type

Separate Type

NominalVoltage(VDC)

EP2-3N1

EP2-3N1T

12

Part Numbers

Coil
Resistance(Ω) ± 10 %Must
Operate Voltage*
(VDC)

Must
Release Voltage*(VDC)

NominalOperate Power
(W)

225

6.5

0.9

0.64

* Test by pulse voltage■ PART NUMBER SYSTEMEP2 F-B3L1 ST★

Contact Resistance (figure 1)

WiringNil : H bridge type
T : Separate type

Enclosure

Nil : Unsealed
S : Sealed

Must Operate Voltage

1 : 6.5 V

Contact Material

L : Silver oxide complex alloy type I
N : Silver oxide complex alloy type II
G : Silver oxide complex alloy type III

Coil Resistance3 : 225 Ω

Carrying Current Capacity

Nil : Standard type
B : High current type

Ambient temperature

Nil : Standard (-40 to +85ºC)
F : High heat resistivity (-40 to +125ºC)

・H Bridge (route A)

A

Type

・Separate (N/C)

・H Bridge (route B)

B

A

B

・Separate (N/O)

60●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EP2 Series*EP2F:High heat resistivity■ SPECIFICATIONS

at 20℃

Items

EP2F

Contact Form

1 Form C × 2 (H bridge type and separate type)Contact Material

Silver oxide complex alloy (Special type available)
50 m Ω max. (measured by voltage drop at 6 VDC, 7A)

Initial Contact ResistanceContact Rating Power

14 VDC, 25A

Contact Switching Current

30 A max. (at 16 VDC)

Contact Carrying Current

25 A (2 minutes max. 12 VDC at 125˚C)
30 A (2 minutes max. 12 VDC at 85˚C)
35 A (2 minutes max. 12 VDC at 25˚C)

Operate Time (Excluding bounce)

Approx. 5 ms (at Nominal Voltage)

Release Time (Excluding bounce)

Approx. 2 ms (at Nominal Voltage, without diode)

Normal Operate Power0.64 W (at 12 VDC)

Insulation Resistance

100 M Ω at 500 VDCWithstand Voltage

500 VAC (for 1 minute)Shock Resistance

98 m / s2 (misoperation), 980 m / s2 (destructive failure)
10 to 300 Hz, 43 m / s2 (misoperation), 10 to 500 Hz, 43 m / s2 , 200 hours (destructive failure)

Vibration ResistanceAmbient Temperature− 40˚C to ＋ 125˚C ( − 40℉ to ＋ 257℉ )Coil Temperature Rise

50˚C / W (90℉ / W) (Contact Carrying Current: 0 A)
1 × 106 operations

Non-load
RunningSpecifications

Load

Contact
G

1 × 10 operations (at 14 VDC, Motor Load 25 A / 5 A) at 25˚C
1 × 105 operations (at 14 VDC, Motor Load 18 A / 3 A) at 125˚C

Contact
L or N1 × 105 operations (at 14 VDC, Motor Load 20 A / 4 A) at 25˚C
1 × 105 operations (at 14 VDC, Motor Load 12 A / 2 A) at 125˚C

5WeightApprox. 15 g (0.53 oz)■ COIL RATING
・EP2F

at 20℃

H Bridge Type

Separate Type

NominalVoltage(VDC)

Contact
G

EP2F-B3G1

EP2F-B3G1T

12

225

6.5

0.9

0.64

Contact
L

EP2F-B3L1

EP2F-B3L1T

12

225

6.5

0.9

0.64

Contact
N

EP2F-B3N1

EP2F-B3N1T

12

225

6.5

0.9

0.64

Part Numbers

Coil
Resistance(Ω) ± 10 %Must
Operate Voltage(VDC max.)Must
Release Voltage(VDC min.)NominalOperate Power(W)* Test by pulse voltage

61●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EP1 Series

Non-promotion

Now, these products are corresponding
only to specific customers.

EP1 series is printed-circuit-board-mount-type and the most suitable for various motor controls in automotive applications
pursuing quality and performance.

■ FEATURES

・For motor reversible control
・Two types of contact according to switching current(Standard type: 25 A max, High current type: 30 A max.)
・PC board mounting
・Flux tight housing■ DIMENSIONS mm (inch)
14.6±0.5(0.57)

3.8(0.15)

0.5 (0.02)

16.0±0.5(0.63)

16.2±0.5(0.64)∗

2-ø0.6 (0.02)

2.65(0.10)
3.5(0.14)∗After soldering

2.2(0.09)

6.4 3.1(0.25) (0.12)

5.45(0.21)

2-1.3×1.3(0.05×0.05)

10.1
(0.4)
4.5
(0.18)

Tolerance ±0.2 mm(0.008) unlessotherwise specified

2-0.5×1.1(0.02×0.04)■ RECOMMENDED PCB PAD LAYOUT and SCHEMATICS(bottom view) mm (inch)

2-ø1.1 +0.1
-0(ø0.043)2-ø1.5 +0.1
-0(ø0.059)1

ø1.9 +0.1-0(ø0.075)2345Not energized position

62●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EP1 Series■ SPECIFICATIONS

at 20℃
Types (Contact Rating)

EP1(Standard)

Items

EP1-B
(High Current)

Contact Form

1 Form C

Contact Material

Silver oxide complex alloy (Special type available)

Initial Contact Resistance

5.2 mΩ typ. (measured by voltage drop at 6 VDC, 7A)

Contact Rating Power

14 VDC, 25A

Contact Switching Current

30 A max. (at 16 VDC)
25 A max. (1 hour max.)
30 A max. (2 minutes max.) at 12 VDCContact Carrying Current

30 A max. (1 hour max.)
35 A max. (2 minutes max.) at 12 VDC

Operate Time (Excluding bounce)

Approx. 5 ms (at Nominal Voltage)

Release Time (Excluding bounce)

Approx. 2 ms (at Nominal Voltage, without diode)

Nominal Operate Power

0.48 W/ 0.64 W (at 12 VDC)

Insulation Resistance

100 MΩ at 500 VDCWithstand Voltage

500 VAC (for 1 minute)Shock Resistance

98 m/s2 (misoperation), 980 m/s2 (destructive failure)

Vibration Resistance

10 to 300 Hz, 43 m/s2 (misoperation),
10 to 500 Hz, 43 m/s2 , 200 hours (destructive failure)

Ambient Temperature− 40 to ＋ 85℃ ( − 40 to ＋ 185℉ )Coil Temperature Rise

50℃ / W (90 ℉ /W)(Contact Carrying Current: 0A)

Running Specifications

1 × 106 operations

Non-load

100 × 10 operations (at 14 VDC, Motor Load 25 A / 5 A)
3Load

WeightApprox. 8 g (0.28 oz)■ COIL RATINGPart Numbers
Standard Type High Current TypeEP1-3L1

EP1-B3G1

at 20℃
NominalVoltage(VDC)

CoilResistance(Ω) ± 10 %Must
Operate Voltage*
(VDC)

Must
Release Voltage*(VDC)

NominalOperate Power
(W)

12

225

6.5

0.9

0.64

* Test by pulse voltage

63●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EP1 Series*EP1F:High heat resistivity■ SPECIFICATIONS

at 20℃

Items

EP1F

Contact Form

1 Form C

Contact Material

Silver oxide complex alloy (Special type available)
50 m Ω max. (measured by voltage drop at 6 VDC, 7A)

Initial Contact ResistanceContact Rating Power

14 VDC, 25A

Contact Switching Current

30 A max. (at 16 VDC)

Contact Carrying Current

30 A (2 minutes max. 12 VDC at 125˚C)
35 A (2 minutes max. 12 VDC at 85˚C)
40 A (2 minutes max. 12 VDC at 25˚C)

Operate Time (Excluding bounce)

Approx. 5 ms (at Nominal Voltage)

Release Time (Excluding bounce)

Approx. 2 ms (at Nominal Voltage, without diode)

Normal Operate Power0.64 W (at 12 VDC)

Insulation Resistance

100 M Ω at 500 VDCWithstand Voltage

500 VAC (for 1 minute)Shock Resistance

98 m / s2 (misoperation), 980 m / s2 (destructive failure)
10 to 300 Hz, 43 m / s2 (misoperation), 10 to 500 Hz, 43 m / s2 , 200 hours (destructive failure)

Vibration ResistanceAmbient Temperature− 40˚C to ＋ 125˚C ( − 40℉ to ＋ 257℉ )Coil Temperature Rise

50˚C / W (90℉ / W) (Contact Carrying Current: 0 A)
1 × 106 operations

Non-load
RunningSpecifications

Load

Contact
G

1 × 10 operations (at 14 VDC, Motor Load 25 A / 5 A) at 25˚C
1 × 105 operations (at 14 VDC, Motor Load 18 A / 3 A) at 125˚C

Contact
L or N1 × 105 operations (at 14 VDC, Motor Load 20 A / 4 A) at 25˚C
1 × 105 operations (at 14 VDC, Motor Load 12 A / 2 A) at 125˚C

5WeightApprox. 8 g (0.28 oz)■ COIL RATING
・EP1F

at 20℃
Part Numbers

NominalVoltage(VDC)

CoilResistance(Ω) ± 10 %Must
Operate Voltage(VDC max.)Must
Release Voltage(VDC min.)NominalOperate Power(W)

Contact
G

EP1F-B3G1

12

225

6.5

0.9

0.64

Contact
L

EP1F-B3L1

12

225

6.5

0.9

0.64

Contact
N

EP1F-B3N1

12

225

6.5

0.9

0.64

* Test by pulse voltage

64●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EP1K Series

Non-promotion

Now, these products are corresponding
only to specific customers.

The NEXEM EP1K series is PC-board mount automotive relay suitable for control of heaters, fans and pumps, etc. The EP1K relay
was developed based on the EP1 relay, and the performance of carrying current is about 10A larger than the EP1 relay.

■ FEATURES

・The performance of carrying current is about 10A larger than the EP1 series
・High heat resistance・Flux tight housing
・Through-hole reflow soldering available■ DIMENSIONS mm＊

2.8

17.0±0.516.2±0.51.5

14.6±0.5

10.1
8.0
3.5

3.1 3.1

2－1.3×1.3

6.4

4.1
＊

6.4

(2.65)

2.2

2‒φ0.65.45＊＊After solder dipping

4－0.5× 1.1＊■ RECOMMENDED PCB PAD LAYOUT and SCHEMATICS (bottom view) mm
2– φ 1.1 +0.1
–03

4– φ 1.5 +0.1
–0
2

4

5
6

2– φ 1.9 +0.1
–0
7
1

8

65

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EP1K Series■ SPECIFICATIONS
Items

Specifications

Contact Form

1 Form C

Contact Material

Silver oxide complex alloy

Contact Resistance4 m Ω typical (measured at 7 A), initial

Contact Rating Power

14 VDC, 25A

Maximum Switching Current

30 A

Minimum Switching Current

1A (5 VDC)
54 A (1hour 14 VDC at 20˚C)*1

Contact Carrying Current
Operate Time (Excluding bounce)

Approx. 5 ms typical (at Nominal Voltage)

Release Time (Excluding bounce)

Approx. 2 ms typical (at Nominal Voltage without diode)

Nominal Operating Power0.64 W
100 M Ω at 500 VDC

Insulation ResistanceWithstand Voltage
Shock Resistance

Between open contacts

500 VAC min. (for 1 minute)

Between coil and contacts

500 VAC min. (for 1 minute)Misoperation

98 m/s2

Destructive Failure

980 m/s2
10 to 300 Hz, 43 m/s2

Misoperation

Vibration Resistance

10 to 500 Hz, 43 m/s2, 200 hours

Destructive Failure

Ambient Temperature− 40 to ＋ 125˚C

Coil Temperature Rise

50˚C/W (Contact Carrying Current: 0 A)
1 × 106 operations

Non-load
Running Specifications

1 × 10 operations (at 14 VDC, Motor Load 25 A / 5 A) at 25˚C
1 × 105 operations (at 14 VDC, Motor Load 18 A / 3 A) at 125˚C
5

Load

WeightApprox. 8 g*1 Mounted on PC-board: FR-4 (Thickness: 1.6mm), Copper (Thickness: 105 μ m, Width: 15mm, Length: 50mm）
This value is allowable value at abnormal case such as fuse blow. And cyclical current is not guaranteed.

■ COIL RATING

at 20℃

Part Numbers

NominalVoltage(VDC)

CoilResistance(Ω) ± 10 %Must
Operate Voltage
(VDC)

Must
Release Voltage(VDC)

EP1K-B3G1

12

225

6.5

0.9

* Test by pulse voltage■ PART NUMBER SYSTEM
EP1K- B 3 G 1 S
Type

Enclosure

Nil : Unsealed
S : Sealed

Must Operate Voltage

1 : 6.5VDC

Contact Material

G : Silver oxide complex alloy

Coil Resistance3 : 225 Ω

Carrying Current Capacity

B : High current type

66

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EM1 Series

The NEXEM EM1 series is PC-board mount automotive relay suitable for control of lamps, C-R circuits, heaters, fans andpumps, etc. The EM1 series has higher switching performance than current relays; EP1, ET1, EX1 series.

■ FEATURES

・Suitable for large inrush current load, such as lamps and CR-circuits, etc.
・Large current capacity (54A 1hour at 20˚C)・High heat resistance・Flux tight housing
・Through-hole reflow soldering available■ DIMENSIONS mm

1.3

* 2.8

16.3±0.5

14.4±0.5

9.6* 2－1.7× 0.6

6.0

5.0

12.4±0.5* 2－0.9× 0.4

7.0

10.0

* 2－1.7× 0.4

2.6*After soldering■ RECOMMENDED PCB PAD LAYOUT and SCHEMATICS (bottom view) mm
4-φ 2.1 +0.1
–0
3

4

2
1
6

2- φ 1.3 +0.1
–05

1 form U

67●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EM1 Series■ SPECIFICATIONS
Items

Specifications

Contact Form

1 From U
Contact Rating Power

Contact Ratings

14 VDC, 40A

Maximum Switching Current

100 A ON / 60 A OFF at 14 VDC(Resistive, 10 operations)

Maximum Carrying Current

54A at 14VDC for 1hour at 20℃ *1

Minimum Switching Current

1 A (5 VDC)

Contact Resistance

2.5 mΩ typical (measured at 7 A) initial

Contact Material

Silver oxide complex alloy

Operate Time (Excluding bounce)

4 ms typical (at Nominal Voltage)

Release Time (Excluding bounce)

1 ms typical (at Nominal Voltage, without diode)

Nominal Operating Power

640 mW

Insulation ResistanceWithstand Voltage
Shock ResistanceVibration Resistance

100 MΩ at 500 VDC
Between open contacts

500 VAC min. (for 1 minute)

Between coil and contacts

500 VAC min. (for 1 minute)Misoperation

98 m/s2

Destructive Failure

980 m/s2
10 to 300 Hz, 43 m/s2

Misoperation

10 to 500 Hz, 43 m/s2, 200 hours

Destructive Failure–40 to ＋ 125℃

Ambient Temperature

1 × 106 operations

Non-load
RunningSpecifications

Load

Resistive

100 × 103 operations (at 14VDC, 40A) at 20℃

Lamp

100 × 103 operations(at 14VDC, Inrush 120A/ Steady 14A) at 20℃

WeightApprox. 7 g*1 Mounted on PC-board: FR-4 (Thickness: 1.6mm), Copper (Thickness: 105μm, Width: 15mm）
This value is allowable value at abnormal case such as fuse blow. And cyclical current is not guaranteed.

■ COIL RATING

at 20℃

Part Numbers

NominalVoltage(VDC)

CoilResistance(Ω) ± 10 %Must
Operate Voltage
(VDC)

Must
Release Voltage(VDC)

EM1-2U1

12

225

6.5

0.9

* Test by pulse voltage■ PART NUMBER SYSTEM
EM1- 2 U 1 S
TypeEnclosure

Nil : Unsealed
S : Sealed

Must Operate Voltage

1: 6.5VDC

Contact MaterialU: Silver oxide complex alloy

Coil Resistance2: 225 Ω68

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EL1 Series

The NEXEM EL1 series is PC-board mount automotive relay suitable for control of various motor, solenoidal coil and power
supply etc. The EL1 series has higher switching and carrying current performance than existing relays, EP1,ET1 and EX1
series.

■ FEATURES

・Suitable for inductive load and large current interruption
・Changing-over circuit available by Form C contacts
・Large current capacity (54A 1hour at 20℃ )・High heat resistance・Flux tight housing
・Through-hole reflow soldering available■ DIMENSIONS mm

1.3

* 2.8

17.3±0.5

14.4±0.5* 2－0.9×0.4

9.6

7.0

10.0

12.4±0.5* 2－1.7×0.6* 2－1.7×0.4*After soldering
6.0

5.0

2.6

■ RECOMMENDED PCB PAD LAYOUT and SCHEMATICS (bottom view) mm
4－φ2.1 ＋0.1
－0

3
2

NC

1
6

2－φ1.3 ＋0.1
－0

4
NO

5

1 form C

69●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

EL1 Series■ SPECIFICATIONS
Items

Specifications

Contact Form

1 Form C
Contact Rating Power

Contact Ratings

NO：40A 14VDC, NC：20A 14VDC (Resistive load)

Maximum Switching Current

100A ON/60A OFF, 14VDC (Resistive load, 10 operations)

Maximum Carrying Current

54A at 14VDC for 1hour at 20℃ *1

Minimum Switching Current
Contact Resistance

5VDC, 1A
NO：3mΩ typical, NC：5mΩ typical (measured at 7A) initial

Contact Material

Silver oxide complex alloy

Operate Time (Excluding bounce)

4ms typical at Nominal voltage

Release Time (Excluding bounce)

1ms typical (at Nominal voltage, without diode)

Nominal Operating Power

640mW

Insulation Resistance

100MΩ at 500VDC

Withstand Voltage
Shock Resistance

Between open contacts

500VAC min. (for 1 minute)

Between coil and contacts

500VAC min. (for 1 minute)Misoperation

98m/s2 (10G)

Destructive Failure

980m/s2 (100G)
10 to 300Hz, 43m/s2 (4.4G)

Misoperation

Vibration Resistance

10 to 500Hz, 43m/s2 (4.4G), for 200 hours

Destructive Failure− 40 to ＋ 125℃

Ambient Temperature

1 × 106 operations

Non-load

RunningSpecifications

100 × 103 operations (NO: 14VDC, Resistive load, 40A)
100 × 103 operations (NO: 14VDC, Inductive load (0.5mH), 30A)

Load

WeightApprox. 7.5g

*1 Mounted on PC-board: FR-4 (Thickness: 1.6mm), Copper (Thickness: 105μm, Width: 15mm）
This value is allowable value at abnormal case such as fuse blow. And cyclical current is not guaranteed.

■ COIL RATING

at 20℃

Part Numbers

NominalVoltage(VDC)

CoilResistance
(Ω)

Must
Operate Voltage*2
(VDC)

Must
Release Voltage*2(VDC)

EL1-2U1C

12225 ± 10%

6.5

0.9

*2 Test by pulse voltage■ PART NUMBER SYSTEM
EL1- 2 U 1 C S
TypeEnclosure

Nil : Unsealed
S : Sealed

Contact FormC

: 1 Form C

Operate Voltage

1: 6.5V

Contact MaterialU: Silver oxide complex alloy

Coil Resistance2: 225 Ω70

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

NOTES ON CORRECT USEThis section provides notes on correctly using the miniature relay. Be sure to read this before using the relay.

Proper functioning of the miniature relay requires appropriate circuit design, mounting and evaluation according
to the purpose of use.
Note that the responsibility for accidents caused by improper circuit design, mounting or evaluation falls on you
and we cannot be responsible for them.

1. GENERAL(1)Never allow the contact load to exceed the maximum ratings; otherwise, the lifetime of the relay will be dramaticallyshortened.
The lifetime specified in the catalog is for certain load conditions, and other factors must be taken into consideration in
actual circuits. Therefore, an accurate lifetime must be measured in the actual circuit.
The two tables below show load current range guidelines.

[Signal relay]
Current range[Power relay]
10μA to 1 mA
GOOD

Application(2)

1 mA to 0.5 A

0.5 A to 2 A

VERY GOOD

NOT SO GOOD
for some cases

・Contacts
・Contactsare stable
may beand highly
unstable.
reliable.
・Thermalelectromotive
force andcontact noise
should betaken into
consideration.

・Infrequent
operationposes noproblem,but frequent
operation
deteriorates
contactstability.
・Use of apower relay
is preferredfor 1 A or
higher.

Current range

Application

to 1 A

1 A to 40 A

NOT SO GOOD
for some cases

VERY GOOD

・Since different・Contacts may beunstable.
contact phenomena
・Since a highoccur depending on
capacitance typethe contact load, it iscontact is not suitable,
necessary to selectit is necessary to selectthe correct contacts.
the correct contacts.

When using the relay with a high current or high capacitance load, an inrush current may cause contact dislocation or
deposition; therefore check the feasibility of use in the actual circuit.

(3)

Be sure to use the relay at an ambient temperature within the maximum ratings; otherwise, the life of the relay will beradically shortened. If use outside the specified temperature range in unavoidable, consult EM Devices.

(4)

With a relay whose coil polarity is specified in its internal circuit diagram, apply the polarity of the rated voltage as
specified. Note that when a rippled DC power source is used, abnormalities such as beat in the coil may occur.

(5)

Exercise care when handling the relay so as not to apply shock to it or drop it.

(6)

The flow soldering conditions are for 5 to 10 seconds at 260℃ .

(7)When cleaning, use alcohol, or a water-based solvent. Avoid using ultrasonic cleaning.

71●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

2. NOTES ON CONTACT LOAD
(1)Minimum load
Use the relay at a voltage and current higher than the minimum load; otherwise, the contact resistance will increase
and the signal cannot be correctly transmitted. This is because stabilization of the contact surface (electrically andmechanically eliminating minute substances generated on the contact surface) by opening/closing the contacts withthe minimum load probably will not occur.
In addition, even if the load is within the maximum ratings, care is required to ensure that the current does not drop
below the minimum load after opening/closing the contacts.

(2)

Contact protection circuit
By providing a protection circuit that suppresses transient current and voltage applied to the contacts when thecontacts are opened or closed, the switching life of a relay can be improved.
It is important to select a correct protection circuit suited to the load.
① General notes(a) It is necessary to place the protection circuit close to the contacts. In principle, place it on the same printed
circuit board as that for the contacts (within a distance of several tens of centimeters).
(b) It is important to confirm the effectiveness of the protection circuit in the actual circuit. In some cases, it is also
necessary to conduct lifetime tests using an appropriate equivalent circuit.
② Examples of contact protection circuits(a) Inductive load
With an inductive load, when the contacts are opened to break the circuit, a counter electromotive force asshown in Fig. 1 is generated, causing an electric discharge between the contacts. This discharge energy
accelerates metal dislocation and wear on the contact surface. A protection circuit is therefore necessary toabsorb this counter electromotive force. Table 1 shows guideline circuit examples and circuit constants. Neveruse a connection with a capacitor only as shown in Table 2.

V

V
Contacts open
E

Inductive load

E

Time

Fig.1 Inductive Load Circuit

72●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

Table 1 Inductive Load Contact Protection Circuits
Protection element

Circuit examplercRemarks

Inductive loadr (Ω) =

Capacitor＋
resistor(CR circuit)contact voltage (V)
0.5 to 1

C (μF) = (0.5 to 1)
× contact current(A)r

The withstand voltage of anon-polar capacitor shouldbe 300 V or higher.

Inductive loadcVaristor

Diode

Diode
＋
Zener diode

Inductive load

High voltage is suppressedby using the voltage
characteristics of thevaristor.

Inductive load

Pay attention to thereverse withstand voltageof the diode.

Inductive load

Pay attention to thereverse withstand voltageof the diode.

Table 2 Examples of Wrong Circuits Using Capacitors
WRONG

c

Load

This circuit is effective forarc suppression when thecontacts are opened, butwhen the contacts are closed
a capacitor short-circuitcurrent flows, making thecontacts more susceptible tometal deposition.

WRONG

c

Load

This circuit is effective forarc suppression when thecontacts are opened, butwhen the contacts are closed
a capacitor charging current
flows, making the contacts
more susceptible to metal
deposition.

73●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

(b) Lamp loads (inrush current), etc.
Some loads, such as halogen lamps, have a low initial resistance so that an inrush current 10 times as high as
the steady-state current may flow through the relay on power application. A high inrush current may also flow
when the relay is used to switch loads such as motors and capacitors. In these cases, a current-limiting resistor
is connected to the contacts in series in order to keep the inrush current to within the maximum rated value(refer to Fig. 2).

Current limiting resistor
Without current-limiting resistor
Current
With current-limiting resistor
Lamp
0
Time

Fig.2 Example of Current-Limiting Resistor in Lamp Load Circuit(c) Stray line capacitance
When the stray line capacitance is large, the inrush current that is generated due to the stray line capacitanceposes a problem. As shown in Fig.3, the electric charge on the line capacitance is discharged directly throughthe contacts when the contacts are closed. The smaller the wiring cable characteristic impedance and thelonger the cable, the greater wear on the contacts.
It is necessary to connect a current-limiting resistor or surge suppresser in series with the contacts as aprotection circuit to suppress the inrush current.

Surge suppressor
Wiring cable

Load

Contacts

Fig.3 Example of Surge Suppression Circuit with Surge Suppressor

74●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

3. NOTES ON DRIVING RELAYS(1)

Temperature characteristics
If the relay is used at an ambient temperature exceeding the operating temperature range, the performance of the relay
may be degraded and the life may be dramatically shortened.
① It is possible to use the relay at the rated coil voltage within the operating temperature range. Note, however,that at the upper limit of the operating temperature range the permissible voltage on the coil may be restricted,
and must be confirmed before the relay is used.
② The must operate voltage, must release voltage, operate time and release time change with the ambient
temperature. Refer to Technical Documents to confirm that the relay operates normally at a particular operating
temperature.Fig.4 shows an example of the temperature characteristics of the relay.

160

120
100
80
60
－60 －40 －20

Ooperate time
Release time（without a diode）
Release time（with a diode）

4
Time
（ms）

deviation
（％）

140

5
Operate & voltage

3
2
1

0

20

40

60

0
－60 －40 －20

80 100 120 140

Ambient temperature
（℃）

0

20

40

60

80 100 120 140

Ambient temperature（℃）

Fig.4 Temperature Characteristics of Relay (Example)(2)

Maximum applied voltage
The maximum applied voltage of the relay coil depends on the ambient temperature and the carrying load current,
and the upper limit is decided on the heat resistance of the relay. It mainly depends on the permissible temperatureof the coil wire and the plastic material. When the voltage applies the coil continuously, the coil generates the heatcorresponding to applied voltage. Then the coil temperature rises up. The higher the ambient temperature is, the lessthe margin of the heat resistance temperature of the coil wire material is. Therefore, it is necessary to restrict the coilvoltage at high ambient temperature. Figure 5 shows the example of permissible applied voltage. And then, the coiltemperature is also affected by the load current. Please consider

the permissible maximum applied voltage in use

condition like ambient temperature, carrying load current and carrying duration.
18

Continuous applled voltage
（V）

16
14
12
10
8
6
4
2
0
－60

－40

－20

0

20

40

60

80

100

120

140

Ambient temperature（℃）

Fig.5 Coil Voltage vs. Ambient Temperature Derating Characteristics (Example of miniature power relay)
75●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1

(3)Hot start
When the temperature of the relay has risen due to heat generated by the voltage applied to the coil, the relay may not
operate even if the coil is energized again immediately after it has been once deenergized. This is because an increasein the coil resistance due to heat in the relay causes the current to fall even though the applied voltage remains constant.
This reenergizing state is called a hot start. This problem occurs especially when the operating temperature is highand a voltage lower than the relay rated voltage is applied. It is necessary to refer to Technical Documents to know inadvance the must operate voltage at the time of a hot start in order to prevent this malfunction.

(4)

Non-must operate and holding voltages
In some circuits, the relay must not operate at a certain voltage or release at a certain voltage. In such cases, contact EM

Relative number of cases

Devices because a special specification product with non-must operate and holding voltages specified can be provided.

Must release voltage

Must operate voltage

Rated voltage

Must operate voltage (rated)

Non-must operate voltage

Holding voltage

Must release voltage (rated)

0

Fig.6 Example of Distribution of Relay Must Operate Voltage and Must Release Voltage(5)

Drive waveformIf the waveform of the relay coil drive voltage gradually increases and decreases, the relay may not be able to deliver
its inherent performance. The voltage must instantaneously rise and fall as a pulse.

GOOD

WRONG

Fig.7 Relay Drive Waveform

76●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

9690RSGVOL02E1709H1(6)Latching relay drive circuit① Since the relay coil has an inductive impedance, a counter electromotive force is generated when the circuit is opened.
This voltage may damage the relay driver transistor, and therefore a diode is connected in parallel with each coil. Witha single coil latching type relay, however, a diode cannot be used because the current direction of the coil is inverted.
Therefore, when a single coil latching type relay is used, select a transistor with sufficient reverse breakdown voltage.
② A latching relay is driven by a pulsating coil voltage. The pulse width of this drive voltage must be 10 ms or wider.
If the pulse is too short, the relay may not operate.
③ Apply a voltage to the coil in the polarity specified by the internal connection diagram of the relay. With a double coillatching type relay, do not apply voltage in a manner that both the set and reset coils are energized at the same time.
(Refer to Fig. 8.)
Set coilSet pulse

Reset coil
+

+

–

–

Reset pulse

Fig.8 Drive Circuit of Latching Relay (Example of Double Coil Latching Type)④ A latching relay is factory-set to the reset state for shipment. However, it may be set while being transported due tovibration or shock. Make sure that the relay is reset when its application system starts operating. When the relay is
employed in a portable system, the circuit must be designed so that the relay is reset at the beginning of operationof the system because the relay may be set by unexpected vibration or shock.
⑤ When configuring a self-holding circuit that uses the self-break contacts of the relay, note that the coil drive circuit is
disconnected by the self-contacts, causing troubles such as self-oscillation.
(7)

Connection of coil diodeIn the case of loads, such as solenoid and electromagnetic clutches, that produce large discharge energy when thecontacts are opened, connect a Zener diode with the drive transistor.
Particularly when the diode is connected in parallel with the coil, the current in the coil diminishes gradually when therelay is released, and thus may slow down opening of the contacts, intensifying wear on the contacts. For this reason,certain products are not recommended diode connection.

(8)

Opening/closing frequency
If the contacts are opened/closed frequently with a high current load, repeated electric discharges may cause contact
metal deposition or damage to the contact spring. When using the relay with a high current load with frequent
opening/closing of the contacts, consult EM Devices.

(9)Long continuous energizing of coil
If the coil is energized continuously for a long time, the coil temperature may rise, promoting generation of organic
gas inside the relay, which is likely to cause trouble in the contacts. When using a circuit requiring constant operation,
consider the possibility of using a latching relay that does not need continuous energizing of the coil.
77●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
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(10) Instantaneous voltage drop of circuit
When the same power source is used for the relay drive circuit and the load circuit in a circuit such as a lamp load
circuit where an inrush current flows, the moment the contacts are closed the source voltage may drop if the powersource capacitance is small. In this case, the relay may be released or an oscillation phenomenon where the relay
repeatedly releases and operates may occur.
Add power source capacitance or a smoothing circuit to prevent this phenomenon.

4. NOTES ON OPERATING ENVIRONMENTS(1)

Ambient temperature
Ensure that the ambient temperature of the relay mounted on the device is within the “operating temperature
range” in the catalog. Use of the relay at a temperature outside this range may adversely affect insulation or contact
performance. For the relationship between the ambient temperature and relay drive conditions, refer to 3. Notes on
Driving Relays.

(2)

Humidity
Use of a sealed type relay in a high humidity (RH85 % or higher) environment for a long time may introduce moistureinside the relay. This moisture may combine with NOx or SOx generated by glow discharges to produce nitric acid or
sulfuric acid. In this case, the acid produced may corrode the metal that forms the relay, causing operation troubles in
the relay. If use of the relay in such a high humidity environment is unavoidable, consult EM Devices in advance.

(3)

Atmosphere
Use of a relay in an atmosphere with a high concentration of sulfur gases (H2S, SO2), nitric acid gas (HNO3), ammonia(NH3), silicon vaporization gas, etc., may cause imperfect contacts and other functional trouble. Avoid use of the relay
in such an atmosphere.

(4)

Atmospheric pressure
A sealed type relay maintains constant sealability under normal pressures (810 to 1200 hPa). However, if it is used
under other pressure conditions, its sealability may be destroyed or the relay may be deformed, causing functional
trouble. Be sure to use the relay under normal pressure conditions.

(5)

Vibration and shock
The vibration resistance and shock resistance of a relay are as shown in the catalog and use of the relay underconditions other than those specified may cause malfunctions or damage.
Be sure to use the relay within those vibration and shock conditions.
Even before the relay is used, repeated excessive vibration or shock load may cause malfunctioning of the relay, by
causing metal deposition on the contacts and other functional trouble. Malfunctions due to vibration or shock during
operation may cause considerable damage or wear of the contacts.
Note that operation of a snap switch mounted close to the relay or shock by operation of an electromagnet may cause
malfunctioning.

(6)

Influence of magnetic fields
The magnetic circuit of a NEXEM miniature relay is constructed so that the relay does not easily malfunction due
to influence of external magnetic fields. However, under the influence of magnetic flux leaking from a transformer,
speaker, or magnet placed in the vicinity of the relay, the must operate voltage, must release voltage, operate time,
release time and other dynamic characteristics may change.
In applications where these characteristics changes pose problems, it is necessary to take measures such as magnetic
shielding. Also, when many make them miniature signal relays are closely located, the magnetic flux leaking fromthose relays may make them interfere with each other, causing changes in the must operate voltage, must releasevoltage, operate time, release time and other dynamic characteristics. Fig. 9 shows examples of the mounting,magnetization, and change in the must operate voltage of signal relays in the EA2 series. In applications where thesecharacteristics changes pose a problem, it is necessary to reduce the mounting density.

78●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

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Sample measured

Change in must operate voltage (%)

Change in must operate voltage
50
40
30
20
10
0
– 10
– 20
– 30
– 40
– 50

Number of samples: 10 each

ON

ON

OFF

OFF

Max. value
Min. value

Case

I

II

III

IV

V

VI

Mounting method

I

ON

OFF

ON

OFF

II

III

ON

OFF

ON

OFF

ON

OFF
V

IV

VI

Fig.9 Change in Must Operate Voltage in Dense Mounting

5. INFLUENCE OF RELAY OPERATION ON SURROUNDINGS(1)Electromagnetic noise
Switching the relay coil generates a high electromotive force due to induction. In general, a surge suppression circuit isconnected in parallel with the relay coil to suppress generation of this electromotive force. However, if this suppression
circuit is not appropriate, electronic circuits such as microcontrollers may malfunction due to the surge generated. Add
an appropriate absorption circuit to prevent electronic circuits from malfunctioning due to the surge generated.

(2)

Arc discharge
Connecting/disconnecting a high current at the relay contacts generates an arc discharge.

This discharge may cause

electronic circuits such as microcontrollers to malfunction and therefore it is necessary to take appropriate measures.
(3)

Generation of leakage magnetic flux
Leakage magnetic flux exists in the vicinity of the relay in the magnetized state. Mounting a magnetic sensor, etc. close
to the relay may cause malfunctioning.

6. NOTES ON MOUNTING(1)Design of printed circuit boards① If an electronic circuit such as a microcontroller is placed close to a relay, noise generated by the relay may cause
malfunctioning.
② When designing patterns keep to the shortest possible distance in wiring.
③ For the printed circuit board on which a relay is mounted, use a board of 1 mm or more in thickness. If the printed
circuit board is not thick enough, it may be subject to warpage which will add tension to the relay, causing variationsin the relay characteristics. Because a flexible printed circuit board is particularly thin, it is necessary to solder near
the root of the relay pins. Since preliminary soldering of the pin root part is often insufficient, its solder is likely to
become loose.
④ If a thermal cycle is applied to the soldered part, cracks may be generated in it. Special care is required for the relay
location, base material and through hole shape.

79●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
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(2)Relay mounting position
The vibration resistance and shock resistance of a relay are greatly affected by its mounting position. It is particularly
important to select the mounting position to prevent the break contacts from being instantaneously interruption due tovibration and shock. The vibration resistance and shock resistance are at a minimum when the direction of vibrationand shock applied to the relay matches the operation direction of the armature (mobile iron piece) and contacts.
Therefore, if it is possible to anticipate the direction of vibration or shocks, mount the relay so that the direction inwhich vibration or shocks are applied is perpendicular to the direction of the relay armature operation. Fig. 10 shows
the direction of relay armature operation.
Signal relay

EA2
EB2
UC2
UD2

Power relay

EC2
EE2
ED2
EF2
UA2
UB2

EP2
ET2

EP1
ET1

EL1
EM1
EX2
EX1

EU2

Fig.10 Direction of Armature Operation(3)

Notes on mounting① Chucking
When a relay is mounted using an automatic machine, note that application of an excessive external force to thecover at the time of chucking or insertion of the relay may damage or change the characteristics of the cover.
② Temporary securing to printed circuit board
Avoid bending the pins to temporarily secure the relay to the printed circuit board. Bending the pins may degrade
sealability or adversely influence the internal mechanism.
③ Application of soldering flux
For an unsealed type relay, do not directly apply soldering flux to the relay.
④ Soldering work
The following conditions are recommended for soldering a relay onto a printed circuit board.
(a) Automatic soldering: Flow solder is recommended.
<Recommended conditions> *Preheating: 100℃ max. 1 min. max.
*Solder temperature: 260℃ max.
*Solder time: 5 to 10 seconds(b) Manual soldering (by soldering iron):<Recommended conditions>*Solder temperature: 350℃ max.
*Solder time: 2 to 3 seconds
Ventilation immediately after soldering is completed is recommended.
Avoid immersing the board in cleaning solvent immediately after soldering; otherwise thermal shock may be
applied to it.

80●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
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⑤ Pin cutting after soldering
Do not cut the pins of the relay with a revolving blade or an ultrasonic cutter, because vibration that is applied to
the relay during the cutting may change the relay characteristics.

7. NOTES ON CLEANING(1)

Cleaning solvent
Use of alcohol or water-based cleaning solvents is recommended. Never use thinner or benzene because thesesolvents may damage the relay housing. A sealed type relay can be immerse-cleaned because solvent does not
penetrate inside the relay.

(2)

Avoid ultrasonic cleaning.
Ultrasonic cleaning may cause a break in the coil wire or sticking of the contacts due to the energy of vibration.

8.

NOTES ON COATING(1)

Coating method
If coating the printed circuit board due to ensure electric insulation and anticorrosion of the board, EM Devices
recommends to coat the board while avoiding the relay by suitable protector so that the coating agent should notadhere to the relay. If the relay is coated with the board by necessity, lower the relay and board up to room temperature
after soldering and cleaning process. And then coat them. Moreover, heat them until perfectly curing in case of heatcuring type agent. If the agent is not stiffened and relay sealability is broken in some causes, the agent may penetrate
into the relay and the relay operation may be blocked.

(2)

Avoidance of silicone
Avoid the coating agent of silicone because contact failure might be caused.

9. NOTES ON HANDLING RELAYS(1)

Use of magazine case stoppers
Relays are packaged in magazine cases for shipment.
When some relays are taken out from the case and space is freed inside the case, be sure to secure the relays in thecase with a stopper. If the relays are not well secured, vibration during transportation may cause contact problems.
Stopper

Stopper

Push in to secure the relays.

Fig.11 Storage in Magazine Case(2)

Do not use relays that have been dropped.
If an individual relay product falls from the work table, etc. a shock of 9800m/s2 (1000G) or more is applied to the relay
and its functions may be destroyed. Even if the shock is apparently weak, confirm that there is no abnormality before
using the relay.

81●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

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10. NOTES ON USING SMT RELAYS(1)

Mounting pads
Determine the dimensions of the mounting pads on the printed circuit board taking into consideration such factors
as solderability and insulation in order to accommodate the mounting accuracy of the automatic mounter. Use thedimensions of the mounting pads in the catalog.

(2)

Solder reflow
The SMT relay is highly resistant to heat. However, solder the relay under the correct temperature conditions sothat the full performance of the relay can be realized. The IRS (infrared ray reflow soldering) and VPS (vapor phasesoldering: reflow by using latent heat of organic solvent) methods are recommended.
In addition, air reflow soldering may also be used. Whichever soldering method is used, be sure to confirm thetemperature conditions for soldering and the influence of soldering on the relay in advance before setting work
standards.

(3)

Storage
The sealability of a surface-mount relay may be lost if the relay absorbs moisture and is then heated during soldering .
Please use relays within 12 months from the data of delivery. (Storage conditions : 30 degree C/60% RH)(4)BakingIf there is a possibility that the relay absorbed moisture, please consider baking the relay before reflow soldering.

82●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

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The information in this document is based on documents issued in May, 2017 at the latest.
The description in this catalog is representative characteristics and is not a guaranteed value. And the description
in this catalog is subject to change without notice. When an order is placed, please request shipping speciﬁcation
which can conﬁrm still more detailed speciﬁcation. In case there is a discrepancy between this catalog and shipping
speciﬁcation, the later shall prevail.
The product described in this catalog is subject to change without notice. When adaption is considered or an order isplaced, please conﬁrm the newest information.
No part of this document may be copied or reproduced in any form or by any means without the prior written consent
of EM Devices Corporation. EM Devices Corporation assumes no responsibility for any errors which may appear inthis document.
EM Devices Corporation does not assume any liability for infringement of patents, copyrights or other intellectual
property rights of third parties by or arising from use of a device described herein or any other liability arising fromuse of such device. No license, either express, implied or otherwise, is granted under any patents, copyrights orother intellectual property rights of EM Devices Corporation or others.
While EM Devices Corporation has been making continuous effort to enhance the reliability of its electronic
components, the possibility of defects cannot be eliminated entirely. To minimize risks of damage or injury to personsof property arising from a defect in an EM Devices electronic component, customer must incorporate sufﬁcient safetymeasures in its design, such as redundancy, ﬁre-containment, and anti-failure features.
EM Devices' products are classiﬁed into the following three quality grades:"Standard", "Special", and "Specific". The Specific quality grade applies only to devices developed based on acustomer designated "Quality assurance program" for a speciﬁc application. The recommended applications of adevice depend on its quality grade, as indicated below. Customers must check the quality grade for each device
before using it in a particular application.
Standard: Computers, ofﬁce equipment, communications equipment, test and measurement equipment, audio
and visual equipment, home electronic appliances, machine tools, personal electronic equipment
and industrial robots
Special: Transportation equipment (automobiles, trains, ships, etc.), traffic control system, anti-disastersystems, anti-crime systems, safety equipment and medical equipment (not speciﬁcally designed
for life support)
Specific: Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life
support systems or medical equipment for life support, etc.
The quality grade of EM Devices' products are "Standard" unless otherwise speciﬁed in EM Devices' Data Sheets or
Data Books. If customers intend to use EM Devices' products for applications other than those speciﬁed for Standard
quality grade, they should contact an EM Devices sales representative in advance.

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact EM Devices for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2017.09.30

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