ULTRA MINIATURE RELAY

2 POLES - 2 A (Slim Profile Signal Relay)

FTR-B4 Series
FEATURES

・DPDT 2C
・Ultra miniature slim type relay for surface mounting
Height: 9.3 mm maximum (THT)
10 mm maximum (SMT)
Weight: Approximately 1.0 g
・UL, CSA recognized・Conforms to Telcordia/FCC Part 68
spacing and high breakdown voltage
Creepage: 1.6mm
Dielectric strength 1.5kV (coil-contact)
Surge strength 2.5kV・High reliable bifurcated gold overlay silver contact
・Low power consumption 140 mW (standard), 100 mW (latching)・RoHS compliant. Please see page 9 for more information
・Plastic sealed



PARTNUMBER INFORMATION[Example]

FTR-B4(a)

C(b)

A(c)

4.5(d)

Z - B05(e)
(f)

(a)

Relay type

FTR-B4: FTR-B4-Series(b)

Terminal typeCGS

: Through hole
: Surface mount: Surface mount, space saving(c)

Coil typeA
B: Standard type
: Latching type (1 coil)(d)

Coil rated voltage

4.5: 1.5.....24 VDC
Coil rating table at page 3(e)Contact materialZP: Gold overlay silver nickel (standard): Gold overlay silver palladium(f)Packaging

Nil:
B05

: Tube packaging: Tape & Reel packaging (only for surface mount type)

Remarks: Actual marking on relay would not carry code FTR and be as below:
Ordering code: FTR-B4CA4.5Z
Actual marking: B4CA4.5Z
1

FTR-B4 SERIESn SPECIFICATION
Item
Contact Data

LifeTiming Data
Insulation

FTR-B4 ( ) A

FTR-B4 ( ) B

2 form CConstruction

Bifurcated contacts

Material

Z: Gold overlay silver nickel /P: Gold overlay silver palladium

Resistance (Initial)

Max. 100 mΩ at 1 A, 6 VDC

Contact rating (resistive)30VDC, 1A / 125VAC, 0.3A

Max. carrying current

2A

Max. switching voltage

250 VAC / 220VDC

Max. switching power

62.5VA / 30W

Min. switching load *0.01mA, 10mVDC

MechanicalMin. 50 x 106 operations

Min. 20 x 106 operations

DC loadMin. 100 x 103 operations at 1A, 30VDC

AC loadMin. 100 x 103 operations at 0.3A, 125VAC

Rated power

140mW - 230mW

100mW - 130mW

Applied pulse width-Min. 10ms

Operate power

80mW - 130mW

57mW - 68mW

Operating temperature range-40 °C to +85 °C (no frost)

Storage temperature / humidity-40 °C to +85 °C / 5% to 85% RH (no frost)

Operate (at nominal voltage, no bounce)Max. 3 ms

Max. 3 ms (set)Release (at nominal voltage, no bounce)Max. 3 ms

Max. 3 ms (reset)

Resistance (initial)

Min. 1,000MΩ at 500VDC

Dielectric strength
Surge strength
Clearance

Creepage
Other

Latching type

Configuration

Electrical
Coil Data

Standard typeVibration resistance
Shock

Open contacts

1,000VAC (50/60Hz) 1min

Contacts to coil

1,500VAC (50/60Hz) 1min

Adjacent contacts

1,000VAC (50/60Hz) 1min.

Coil to contacts

2,500V, 2 x 10µs standard wave

Adjacent contacts

1.0 mmOpen contacts

0.28 mm

Coil and contacts

1.0 mmAdjacent contacts

1.0 mmOpen contacts

0.28 mm

Coil and contacts

1.60 mm

Misoperation

10 to 55 to 10Hz at single amplitude 1.65 mm

Endurance

10 to 55 to 10Hz at single amplitude 2.5 mm

Misoperation

750m/s² (11 ±1ms)

Endurance

1,000m/s² (6 ±1ms)

WeightApproximately 1 g

Sealing

RT III (plastic sealed)* Minimum switching loads mentioned above are reference values. Please perform the confirmation test with actual load beforeproduction since reference values may vary according to switching frequencies, environmental conditions and expected reliability levels.

2

FTR-B4 SERIESn COIL RATING
Standard type
Coil
Code

Rated CoilVoltage
(VDC)

Coil
Resistance+/- 10% (Ohm)Must Operate
Voltage(VDC) *

Must Release
Voltage(VDC) *

1.5

1.5

16.1

1.13

0.15003

3

64.3

2.25

0.3

4.5

4.5

145

3.38

0.450066257

4.5

0.60099579

6.75

0.9012

121,0289.0

1.2024

24

2,504

18.0

2.4

Set Voltage(VDC) *Reset Voltage(VDC) *Set/Reset current(mA)+1.13-1.1350

Rated Power(mW)

140230Latching type (1 coil)
Coil
CodeRated CoilVoltage(VDC)

1.5

1.5

Coil
Resistance +/10% (Ohm)22.5003

390

+2.25

-2.25

25

4.5

4.5

203

+3.38

-3.38

17006

6360

+4.5

-4.5

13009

9810

+6.75

-6.75

8012

12

1,440

+9.0

-9.0

6024

24

4,800

+18.0

-18.0

4

Rated Power(mW)

100120Note: All values in the table are valid for 20°C and zero contact current.
* Specified operate values are valid for pulse wave voltage..

n SAFETY STANDARDS
TypeComplianceContact rating

UL

UL 508Flammability: UL 94-V0 (plastics)

E 63615
CSA

C22.2 No. 14
LR 40304

0.5A, 125VAC (resistive)
1A, 30VDC
0.3A, 110VDC
2A, 30VDC

Comply with Telcordia specifications and FCC part 68 and meet BSI EN60950-1: Marking only for UL, CSA

3

FTR-B4 SERIESn CHARACTERISTIC DATA (Reference)l Standard type4

FTR-B4 SERIESl Latching type (1coil)5

FTR-B4 SERIES

6

FTR-B4 SERIES■FTR-B4C - Through hole type●●●

(BOTTOM VIEW)
10.9 max.
10.6 typ.

6.0 max.
5.7 typ.

32(BOTTOM VIEW)

4φ

3.2

9.3 max.
9.0 typ.

+(-)

3.5

8
8- Pre-solder

3.2

Orientation mark

2.2

2.2

0.2

0.4
3.2

-(+)

3.2

2.2 2.2

FTR-B4G - Surface mount type●●●(TOP VIEW)(TOP VIEW)
0.8

6.0 max.
5.7 typ.

3°

2.2 2.2

0.2

3.2

2

0.4

34

0.8

0.8

Orientation mark

3.2

0.8

5-(+)

+(-)
8- Pre-solder

0.8

5.38
10.0 max.
9.7 typ.

10.9 max.
10.6 typ.

3.2

2.2

2.2

FTR-B4S- Space saving type(TOP VIEW)

-(+)

3.2

2.2 2.2

0.2

8- Pre-solder

3°

3.2

0.8

0.8

3.2

2.2

4.45+(-)

0.4

5

0.8

2.25

10.0 max.
9.7 typ.

8(TOP VIEW)
0.8

2.25

6.0 max.
5.7 typ.

10.9 max.
10.6 typ.

234

2.2

Orientation mark* Contacts indicates reset state for latching relays (FTR-B4CB, FTR-B4GB and FTR-B4SB versions) andnon-operate state for standard relays (FTR-B4CA, FTR-B4GA and FTR-B4SA versions).
* +/-: Apply set voltage for latching relays, operate voltage for standard relays.
(+)/(-): Indicates set state for latching relays, operate state for standard relays.
Note: Tolerance for PC board mounting hole/pad layout: +/-0.1.
Note: Dimensions of the terminals do not include thickness of pre-solder.

Unit: mm( ): Reference

7FTR-B4 SERIESn COIL POLARITY LATCHING TYPE
Coil terminal

18Set+-Reset-+n RECOMMENDED SOLDERING CONDITIONS FOR SMT (SEE PAGE 9)(TEMPERATURE PROFILE)
Notes:
1. Temperature profiles on page 9 show the temperature of PC board surface.
2. Please perform soldering test with your actual PC board before mass production, since the temperatures of PC board surfaces vary
according to the size of PC board, status of parts mounting and heating method.

n PRECAUTIONS- For details on general precautions, refer to the section on technical descriptions.
- Since this is a polarized relay, follow the instructions of the internal wiring diagram for the ± connections of the coil.
- Note that the terminal layout and internal wiring of the surface mount relay are a top view.
- Characteristic data is not guaranteed values but measured values of samples from production line.

n PACKAGING SPECIFICATIONSl Packaging methodl Packaging orientation code: B- Packaging standard: JIS C 0806
- Taping type: TB 2412
- Reel type: R24D
- Quantity of 1 reel: 500 pieces

l Reel dimensions

l Tape dimensions

Note:
Relays are sold in 500 pieces per box. Minimum order quantity is 1000 pieces
for tube packing and 500 pieces for tape & reel packing.
8FTR-B4 SERIESCAUTIONS
・All values mentioned in this datasheet are provided under ideal conditions. Please perform the confirmation test before actual use.
・Reflow soldering is not available with standard type.
・Do not use relays in the atmosphere with sulfide gas, chloride gas or nitric oxide. Contact resistance may increase.
・Do not use silicon or silicon-containing product or materials near relays. It may cause contact failure.

Notes for latching relays
・Latching relays are shipped in the state reset, but state may change due to shock during transportation or mounting.
Before using the relays, it is advisable to bring the relays in necessary state (set or reset) and program a circuit sequence.
Otherwise, it will or will not operate simultaneously with power activation.
・Please connect relay coils according to specified polarity.
・ Do not apply voltage to both set coil and reset coil at a time.

GENERAL INFORMATION
1. RoHS Compliance•All relays produced by FCL Components are compliant with RoHS directive 2011/65/EU, including
commission delegated directive 2015/863.

2. Recommended lead free solder condition
Maximum 120˚C within 90 sec.

Soldering:Dip within 5 sec. at 255°C±5°C
solder bathRelay must be cooled by air immediately aftersoldering

Solder by Soldering Iron:
Soldering Iron: 30-60W
Temperature: Maximum 350-360˚CDuration:
Maximum 3 sec.

Reflow Solder Condition:(Applicable only for reflow capable type)
Recommended reflow soldering profile: IRS (infrated reflow soldering)
Peak temperature: Max.250°C
Temperature (°C)

Flow Solder Condition:

Pre-Heating:250230180

Air cooling

Pre-heating

150
90 to 120 sec.

Max. 30 sec.

Max.120 sec.

(Time)

Important notes for reflow soldering・Temperature shall be measured at PC board upper surface.
・Temperature at PC board upper surface may be changed depending on size of PC board, components mounted on the PC board
and/or heating method. Please perform the confirmation test wtih actual PC board.
・This reflow condition is applicable only for reflow-capable relays. Do not reflow reflow-incapable relays.
・Recommended solder for assembley: Sn-3.0 Ag -0.5 Cu.

We highly recommend that you confirm your actual solder conditions

3. Moisture Sensitivity•

Moisture Sensitivity Level standard is not applicable to electromechanical relays, unless otherwise indicated.

4. Tin Whiskers•Dipped SnAgCu solder is known as presenting a low risk to tin whisker development. No considerable
length whisker was found by our in house test.
9ContactJapan
FCL COMPONENTS LIMITED
Shinagawa Seaside Park Tower
12-4, Higashi-shinagawa 4-chome,
Tokyo 140 0002, Japan
Tel: +81-3-3450-1682
Email: fcl-contact@cs.fcl-components.com

North and South America
FCL COMPONENTS AMERICA, INC.
2055 Gateway Place Suite 480,
San Jose, CA 95110 USA
Tel: +1-408-745-4900
Email: fcai.components@fcl-components.com

Asia Pacific
FCL COMPONENTS ASIA PTE LTD.
No. 20 Harbour Drive, #07-01B
Singapore 117612
Tel: +65-6375-8560
Email: fcal@fcl-components.com

China
FCL COMPONENTS (SHANGHAI) CO., LTD.
Unit 1105, Central Park - Jing An,
No.329 Heng Feng Road, Shanghai 200070,
China
Tel: +86-21-3253 0998
Email: fcsh@fcl-components.com

EuropeFCL COMPONENTS EUROPE B.V.
Diamantlaan 25
2132 WV Hoofddorp, Netherlands
Tel: +31-23-556-0910
Email: info.fceu@cs.fcl-components.com

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owners.
FCL Products are intended for general use, including without limitation, in personal, household and office environments, in buildings
and for ordinary use in the industry. FCL Products are not intended to be used in applications where extremely high safety is required(”High Safety Required Applications”), such as, but not limited to, applications in nuclear facilities, in aircraft automatic flight control, in air
traffic control, in mass transit system control, in missile launch system, in weapon systems, in medical equipment for life support or any
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Please do not use FCL Products without securing the sufficient safety and reliability required for the High Safety Required Applications.
In addition, FCL shall not be liable against the customer and/or any third party for any claims or damages arising in connection with theuse of FCL Products in the High Safety Required Applications.
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general information purposes. The use of the contents, data and information provided in this datasheet is at the users’ own risk.
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its employees, for any loss or damage, direct, indirect or consequential, with respect to this datasheet, its contents, data, and information
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Nor do FCL Components Limited and affiliated companies accept on their behalf, nor on behalf of its employees, any responsibility orliability with respect to these datasheets, its contents, data, information and related graphics and the correctness, reliability, accuracy,comprehensiveness, usefulness, availability and completeness thereof. Rev. February 1, 2024.