ULTRA MINIATURE RELAY
2 POLES - 2 A Low Profile Signal Relay

FTR-B3 Series


FEATURES

PARTNUMBER INFORMATION

・DPDT 2C・Ultra miniature low profile relay with high heat resistant material
・Height: 5.25mm, Weight: 0.85g, Mounting space: 87mm 2・Adopted superior contact spring for high frequency characteristic
・Comply with Telcordia / FCC part 68- Isolation distance: min. 1.6mm- Dielectric strength between coil and contact: 1500VAC- Surge strength: 2500V
・Low power: Non-latching: 140mW (230mW at 24V)
Latching: 100mW (120mW at 24V)
・High reliable bifurcated gold overlay silver contact
・UL, CSA recognized. Conforms to BSI, IEC60950-1
・RoHS compliant. Please see page 9 for more information
・Plastic sealed[Example]

FTR-B3(a)

G(b)

B
(c)

012
(d)

Z (e)

B10(f)(a)

Relay type

FTR-B3: FTR-B3-Series(b)

Terminal typeC
GS

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

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

Coil rated voltage012: 1.5.....24 VDC
Coil rating table at page 3(e)Contact material

ZP: Gold overlay silver nickel: Gold overlay silver palladium(f)Packaging

NilB10: Tube packaging: Tape&Peel packaging (only for surface mount type)

Remarks: Actual marking on relay would not carry code FTR and be as below: Ordering
code: FTR-B3GB012Z-B10 Actual marking: B3GB012Z
1

FTR-K1
FTR-B3SERIESSERIESn SPECIFICATION
ItemContact Data Configuration

Life

Coil Data

Standard type

Latching type

FTR-B3 ( ) A

FTR-B3 ( ) B

2 form CConstruction

Bifurcated contacts

Material

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

Resistance (initial)

Max. 75 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

Electrical (rated load)

Min. 100 x 103 operations at 1A 30VDC
Min. 100 x 103 operations at 0.3A 125VAC

Rated power (at 20 °C)

140mW - 230mW

Applied pulse width

Timing DataInsulation-Min. 10ms

Operate power (at 20 °C)

80mW - 130mW

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
Open contacts

Dielectric strength
Surge strength
Clearance

Creepage
Other

100mW - 120mW

Vibration resistance
Shock57mW - 68mW

1,000VAC (50/60Hz) 1minAdjacent contacts 1,000VAC (50/60Hz) 1min.
Contacts to coil

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

Contacts to coil

2,500V, 2 x 10µs standard wave

Open contacts

0.28 mm

Adjacent contacts 1.0 mm
Contacts to coil

1.0 mmOpen contacts

0.28 mm

Adjacent contacts 1.0 mm
Contacts to coil

1.60 mm

Misoperation

10 to 55 to 10Hz single amplitude 1.65mm

Endurance

10 to 55 to 10Hz single amplitude 2.5mm

Misoperation

750m/s² (11 ±1ms)

Endurance

1,000m/s² (6 ±1ms)

WeightApproximately 0.85 g

Sealing

RT III (plastic sealed)* Minimum switching loads mentioned above are reference values. Please perform the confirmation test withactual load before production since reference values may vary according to switching frequencies,
environmental conditions and expected reliability levels.
2

FTR-B3
SERIESFTR-K1SERIESn COIL RATING
Standard type
Must Operate
Voltage(VDC) *

Must Release
Voltage(VDC) *

1.5

Coil Resistance+/-10%(Ohm)
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)

Coil
CodeRated CoilVoltage
(VDC)

1.5

Rated Power(mW)

140230Latching type (1 coil)
Coil
Code

Rated Coil Coil Resistance+/-10%
Voltage
(Ohm)
(VDC)

1.5

1.5

22.5

+1.13

-1.13

50003

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

+18.0-18.04Rated Power(mW)

100

120

Note: 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

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

CSA

C22.2 No. 14
LR 40304-58

Comply with Telcordia specifications and FCC part 68 and meet BSI, IEC60950-1: Marking only for UL, CSA

3

FTR-K1
SERIES
FTR-B3
SERIESn CHARACTERISTIC DATA (Reference)l Standard type4

FTR-K1
SERIES
FTR-B3
SERIESl Latching type5

FTR-K1
FTR-B3SERIESSERIES6

FTR-B3 SERIES DIMENSIONSFTR-B3C - Through hole type

 Schematics *(BOTTOM VIEW)

 Dimensions
7.5 max.
7.2 typ.
5.4 max.
5.2 typ.

10.9 max.
10.6 typ.

8- Pre-solder

+(-)
21348
-(+)

657

 PC board mounting
hole layout

φOrientation markFTR-B3G - Surface mount type

 Dimensions

7.5 max.
7.2 typ.

-(+)

5.45 max.
5.25 typ.

10.9 max.
10.6 typ.

 Schematics *(TOP VIEW)

8- Pre-solder

 PC board mounting
pad layout

87651234+(-)

Orientation markFTR-B3S - Space saving type-(+)

7.5 max.
7.2 typ.

87651234

8- Pre-solder

6.14

5.45 max.
5.25 typ.

10.9 max.
10.6 typ.

 PC board mounting
pad layout(TOP VIEW) Schematics *(TOP VIEW)

 Dimensions+(-)

Orientation mark* Contacts indicates reset state for latching relays (FTR-B3CB, FTR-B3GB and FTR-B3SB versions) andnon-operate state for standard relays (FTR-B3CA, FTR-B3GA and FTR-B3SA versions).
* +/- : Apply set voltage for latching relays, operate voltage for standard relays.
(+)/(-): Apply reset voltage for latching 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-K1
FTR-B3SERIESSERIESn 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 ofPC 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 value but measured values of samples from production line.

n PACKAGINGSPECIFICATIONSl Packaging methodl Packaging orientation code: B- Packaging standard: JIS C 0806
- Taping type: TB 1612
- Reel type: R16D
- Quantity of 1 reel: 1000 pieces

l Reel dimensions

l Tape dimensions

Unit: mm
Note:
Relays are sold in 1000 pieces per box. Minimum order quantity is 1000pieces for tube and tape & reel packing.
8FTR-B3 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 bath

Relay 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:

250
230
180

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ContactJapanFCL 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 252132 WV Hoofddorp, Netherlands
Tel: +31-23-556-0910
Email: info.fceu@cs.fcl-components.com

Web: www.fcl-components.com/en/© 2024 FCL Components Limited. All rights reserved. All trademarks or registered trademarks are the property of their respective
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 anyapplication involving a direct serious risk of physical injury or death.
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and workmanship for twelve months from delivery.
The implied warranties of merchantability and fitness for a particular purpose and all other warranties, representations and conditions,express or implied by statute, trade usage or otherwise, expect as set forth in this warranty, are excluded and shall not apply to theProducts delivered.
The contents, data and information in this datasheet are provided by FCL Components Limited as a service only to its user and only for
general information purposes. The use of the contents, data and information provided in this datasheet is at the users’ own risk.
FCL has assembled this datasheet with care and will endeavor to keep the contents, data and information correct, accurate, comprehensive, complete and up to date.
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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.