June 29, 2023

DATA SHEETAUTOMOTIVE RELAYS

EM1K SERIESDESCRIPTIONThe NEXEM EM1K series is PC-board mount type and suitable for power supply, fan, pumps, heater, CR circuits controls and otherapplications for automobiles which require high quality and high performance.
The EM1K series have higher carrying current performance than the current relay like EM1 series.

FEATURE・ Large current capacity (81A 1hour at 20℃)
・ High heat resistance・ Flux tight housing
・ Pb free・ Through-hole reflow soldering available

APPLICATION・ Power supply
・ Motor control such as fan and pumps
・ Heater control
・ CR circuit control
・ Lamp control

For Proper Use of Miniature Relays
DO NOT EXCEED MAXIMUM RATING
Do not use relay under excessive conditions such as over ambient temperature, over voltage and over current. Incorrect
use could result in abnormal heating and damage to the relay or other parts.

READ CAUTIONS IN THE SELECTION GUIDE
Read the cautions described in EM Devices' “Miniature Power Relay Automotive Function and Notes on Correct Use” and“Notes on Correct Use” in Miniature Relays selection guide” before does designing your relay applications.
●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 “Miniature Power Relay Automotive Function and Noted on Correct Use”, "NOTE ON CORRECT USE" in "Miniature Relays selection guide" catalog.
●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.

-1-EM1K SERIESSCHEMATICS (BOTTOM VIEW)
34216

DIMENSIONS (in mm)

5Country of Origin

Logo

VENT HOLE(Sealed/Unsealed)

PHILIPPINES

Part Number

EM1K-2U1S
3J1 999

Lot code

1.3* 2.8 -0.5

+1.0

16.3 ±0.5

14.4 ±0.5* 2-0.9x0.4

6.0

5.0

12.4 ±0.5* 2-1.7x0.6

9.6

7.0

10.0

* 2-1.7x0.4

2.6

RECOMMENDED PCB PAD LAYOUT (BOTTOM VIEW) (in mm)* AFTER SOLDER DIP+0.14-φ2.1-0+0.12-φ1.3 -0●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 “Miniature Power Relay Automotive Function and Noted on Correct Use”, "NOTE ON CORRECT USE" in "Miniature Relays selection guide" catalog.
●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.

-2-June 29, 2023 ERCP23-034-1E

EM1K SERIESSPECIFICATIONS(Ambient temperature: 20°C)
Items

Specifications

Contact form

Contact rating

1u
Max. switching voltage (1)16Vdc

Max. switching current (1)100A ON / 60A OFF at 14Vdc

Min. switching current

1A at 5Vdc

Max. carrying current (2)81A at 14Vdc for 1hour at 20°C
2.5mΩ typical, 25mΩ max.

Contact resistance(6Vdc–7A voltage drop method, initial)

Rated load

40A-14Vdc, Resistive load

Contact material

Silver oxide complex alloy

Operate time (3)10ms max.

Release time (3)10ms max.

Insulation resistance

100MΩ min. at 500Vdc

Breakdown

Between open contacts

500Vac min. for 1minutevoltage

Between coil and contact

500Vac min. for 1minuteShock resistance

Misoperation

98m/s2

Destructive failure

980m/s2

Vibration

Misoperation

10 to 300Hz, 43m/s2

resistance

Destructive failure

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

Ambient temperature
Life expectancy-40 to +125°C (no freezing)

Mechanical

1,000,000 cycles

Electrical

100,000 cycles (Rated load)

Weight8g typical(1) Resistive, 10cycles(2) Copper thickness: 105µm, width: 15mm.
(3) Excluding contact bounce, nominal voltage applied, without flywheel coil diode(4) EM Devices recommends that the usage of the coating agent close to the relay is to be avoided.

COIL RATING(Ambient temperature: 20°C)
NominalCoilMust

Must

NominalVoltage

ResistanceOperate Voltage (4)Release Voltage (5)Operating Power(VDC)(Ω)±10%

(VDC)

(VDC)

(W)

12225

6.5

0.9

0.64

(5) Test by pulse voltage●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 “Miniature Power Relay Automotive Function and Noted on Correct Use”, "NOTE ON CORRECT USE" in "Miniature Relays selection guide" catalog.
●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.

-3-June 29, 2023 ERCP23-034-1E

EM1K SERIESPART NUMBER SYSTEM
EM1K- 2U1SType

Enclosure

Nil:

Unsealed

S:

SealedMust operate voltage

1:

6.5V

Contact Material

U:

Silver oxide complex alloy (Standard)

Coil Resistance

2:

225Ω

Contact form

Coil Nominal voltage

Coil Resistance

Sealed type

Unsealed type

1u

12VDC

225Ω

EM1K-2U1S

EM1K-2U1●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 “Miniature Power Relay Automotive Function and Noted on Correct Use”, "NOTE ON CORRECT USE" in "Miniature Relays selection guide" catalog.
●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.

-4-

June 29, 2023 ERCP23-034-1E

EM1K SERIESCOIL DRIVE CIRCUIT
Recommended Circuit

Relay coil

Relay coil

Relay coil

Zener
diode(a)

(b)

Diode
Zener
diode(c)Non-recommended Circuit

Relay coil

Diode(d)(Note)EM Devices recommends coil drive circuit (b) and (c) for coil fly back suppression, but does not recommend thecircuit (d) because the performance of the EM1K relay does not appear enough.

●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 “Miniature Power Relay Automotive Function and Noted on Correct Use”, "NOTE ON CORRECT USE" in "Miniature Relays selection guide" catalog.
●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.

-5-June 29, 2023 ERCP23-034-1E