POWER RELAY
1 POLE – 25A Latching Relay

FTR-K3L Series
 FEATURES
 1 pole, 25A, 1 form A 2 coils latching type
 High insulation (between coil and contacts)
Insulation distance:clearance min. 6.4mm
creepage min. 9.5mm
Dielectric strength: 5,000VAC
Surge strength: 8,500V
 Cadmium free contact for eco-program Plastic materials- UL 94 flame class V-0
 Flux proof, RT II
 RoHS compliant

 PARTNUMBER INFORMATION[Example]

FTR-K3L

AB012W

(a)

(b)

(c)

(d)

(e)

(a)

Relay type

FTR-K3L: FTR-K3L Series(b)Contact configuration

AJ: 1 form A / PCB type
: 1 form A / Tab type(c)Coil power

B: Standard sensitive (0.9W)(d)Coil rated voltage012: 5....24VDC
See coil data chart(e)Contact materialW: Silver alloy

Actual marking does not carry the type name : "FTR"
E.g.: Ordering code: FTR-K3LAB012W Actual marking: K3LAB012W

1

FTR-K3L Series
 SPECIFICATIONS
ItemContactdata

Coil data

FTR-K3L
Configuration

1 form AConstruction

SingleMaterial

Silver alloy

Resistance (initial)

Max. 100mΩ at 1A, 6VDC

Contact rating (resistive)

25A, 250AC

Max. carrying current

30A

Max. switching voltage

250VAC

Max. switching power

6,250VA

Max. switching current

25A

Min. switching load *100 mA, 5VDC

Rated power (20℃)

900 mW

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

Timing data Set (at nominal voltage)

LifeInsulation

Reset (at nominal voltage)

Max. 20ms (without bounce, without diode)

Coil excitation time (at nominal voltage)Min. 30ms, max. 1,000ms

MechanicalMin. 1 x 106 operations

Electrical (resistive)

25A, 250VAC, Min. 100 x 103 operations

ResistanceMin. 1,000MΩ at 500VDC

Dielectric strength

Surge strength

OthersMax. 20ms (without bounce, without diode)Open contacts

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

Coil to contacts

5,000VAC (50/60Hz) 1min

Coil to contacts

8,500V / 1.2 x 50μs standard wave

Clearance

6.4mm

Creepage

9.5mm

Vibration
resistance

Misoperation

10 to 55 to 10Hz single amplitude 0.825mm

Endurance

10 to 55 to 10Hz single amplitude 1.0mm

Shock

Misoperation

Min. 200m/s2 (11 ± 1ms)

Endurance

Min. 1,000m/s2 (6 ± 1ms)

WeightApproximately 25g

SealingFlux proof, RTII

* Minimum switching loads mentioned above are reference values. Please perform the confirmation test with actual load
before production since reference values may vary according to switching frequencies, environmental conditions andexpected reliability levels.
Care shall be taken on the heat generated on PC board when maximum carrying current exceeds 10A. Please performthe confirmation test with actual conditions.

2FTR-K3L Series
 COIL DATA
CoilCodeRated CoilVoltage
(VDC)

005

5006

6012

1202424

Coil Resistance±10% (Ω）

Set Voltage*(VDC)

Reset Voltage*(VDC)

P 28+4.0-

S 28-+4.0

P 40+4.8-

S 40-+4.8

P 160+9.6-

S 160-+9.6

P 640+19.2-

S 640-+19.2

Max. Applicable
Voltage (VDC)

Rated Power(mW)

9.0

10.8
900
21.6

43.2
P: Set coil, S: Reset coil

Note: All values in the tables are valid for 20℃ and zero contact current.
* Specified operate values are valid for pulse wave voltage.
Please use at rated coil voltage. Continuous energization on coil at the voltage exceeding max. applicable voltage isprohibited. Insulation deterioration may occur.
Do not apply any voltage exceeding max. applicable voltage on reset coil. Operation failure or mis-operation may occur.

 SAFETY STANDARDS
TypeComplianceContact ratingcULus

UL 508
CSA 22.2 No. 14
E63614

Flammability: UL 94-V0 (plastics)

IEC/EN61810-1

25A, 250VAC (cos=φ1), 100K operations at 60℃,60K operations at 85℃

VDE

25A, 277VAC (resistive at 85℃)

3

FTR-K3L Series DIMENSIONS

Notes:• Dimensions of the terminals do not include thickness of pre-solder.
• Dimensions do not include tolerance.
• Tolerance of PC board mounting hole layout : ±0.1 unless otherwise specified.

Unit:mm( ): Reference

4FTR-K3L Series
 CHARACTERISTIC DATA(Characteristic data is not guaranteed value but measured values of samples from production line.)5FTR-K3L Series
CAUTIONS
・All values mentioned in this datasheet are provided under ideal conditions. Please perform the confirmation test
before actual use.
・Reflow soldering is prohibited.
・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 set, but state may change due to shock during transportation or mounting.
Before uing 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 commissiondelegated directive 2015/863.

2. Recommended lead free solder condition•

Lead free solder plating on relay terminals is Sn-3.0Ag-0.5Cu, unless otherwise specified. This material has beenverified to be compatible with PbSn assembly process.

•Recommended solder for assembly: Sn-3.0Ag-0.5Cu.

Flow Solder Condition:
Pre-Heating:Soldering:

Maximum 120˚C
within 90 sec.
Dip within 5 sec. at 255°C±5°C solder bath

Relay must be cooled by air immediately after soldering

Solder by Soldering Iron:
Soldering Iron:
Temperature:
Duration:

30-60W
Maximum 350-360˚C
Maximum 3 sec.

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.

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 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
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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.