DATA SHEETAUTOMOTIVE AC RELAYSAX1 SERIESDESCRIPTIONThe NEXEM AX1 series is AC relay for On Board Charger (OBC) applications of Electric Vehicle for automobiles which require highquality and high performance.
The AX1 series have higher carrying current performance for AC load.

FEATURE・ Large current capacity for AC load (16A and 32A rated current)
・ Small size
・ High heat resistance・ Flux tight and Plastic sealed housing
・ Pb free

APPLICATION
・ On Board Charger (OBC) of Electric Vehicles (PHEV and BEV)

●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 "AUTOMOTIVE POWER RELAY USER’S MANUAL" in web site.
●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-

https://www.em-devices.com/en/April, 2024 ERCP23-027-4E

AX1 SERIES[1a Type]
SCHEMATICS (BOTTOM VIEW)DIMENSIONS (in mm)

RECOMMENDED PCB PAD LAYOUT (BOTTOM VIEW) (in mm)●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 "AUTOMOTIVE POWER RELAY USER’S MANUAL" in web site.
●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-

https://em-devices.com/en/April, 2024 ERCP23-027-4E

AX1 SERIES[1c Type]
SCHEMATICS (BOTTOM VIEW)DIMENSIONS (in mm)

RECOMMENDED PCB PAD LAYOUT (BOTTOM VIEW) (in mm)●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 "AUTOMOTIVE POWER RELAY USER’S MANUAL" in web site.
●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-

https://em-devices.com/en/April, 2024 ERCP23-027-4E

AX1 SERIESSPECIFICATIONS (Rated current: 32A)
(Ambient temperature: 20°C)
Items

Specifications

Contact form

Contactrating

1 form A

1 form C

Max. switching voltage

277VacMax. switching current

32A

Max. continuous current (1)40A (at 105°C)

Contact resistance

10mΩ (20A 6Vdc)

Rated load

277Vac 32A, Resistive load

Contact material

Ag alloyOperate time (2)15ms max.

Release time (2)10ms max.
Insulation resistance

Insulation

1000MΩ min. at 500Vdc

Dielectric

Between open contacts

1000Vac, 50/60Hz 1minutestrength

Between coil and contact

4000Vac, 50/60Hz 1minute

Shock

Misoperation

98m/s2

resistance

Destructive failure

980m/s2

Vibration

Misoperation

resistance

Destructive failure

10 to 55Hz, 1.5mm DA

Ambient temperature-40 to +105°C (no freezing and condensation)

Mechanical

300,000 cycles
Making 25A, Carrying 32A, Breaking 25A, 250Vac at 105°C

Electrical (N/O) (3)10,000cycles

LifeMaking 5A,expectancy
Electrical (N/C) (3)-Carrying 32A, Breaking 5A,250Vac at 105°C
10,000cycles

WeightApprox. 16g(1) After the rated voltage is applied to the coil for 200ms, the coil excitation voltage is reduced to the holding voltage.
(2) Excluding contact bounce without flywheel coil diode.
(3) This performance is Flux tight type. Regarding performance of plastic sealed type, please contact EM Devices Corporation.
(4) EM Devices recommends that the usage of the coating agent close to the relay is to be avoided.
(5) Please take care of the relay orientation installed in a car to avoid the malfunction by the vibration, impact and so on. If you haveany questions, please contact 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 "AUTOMOTIVE POWER RELAY USER’S MANUAL" in web site.
●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-

https://em-devices.com/en/April, 2024 ERCP23-027-4E

AX1 SERIESSPECIFICATIONS (Rated current: 16A)
(Ambient temperature: 20°C)
Items

Specifications

Contact form

Contact
rating1 form A

1 form C

Max. switching voltage

277VacMax. switching current

16A

Max. continuous current (6)20A (at 105°C)

Contact resistance

10mΩ (20A 6Vdc)

Rated load

277Vac 16A, Resistive load

Contact material

Ag alloyOperate time (7)15ms max.

Release time (7)10ms max.
Insulation resistance

Insulation

1000MΩ min. at 500Vdc

Dielectric

Between open contacts

1000Vac, 50/60Hz 1minutestrength

Between coil and contact

4000Vac, 50/60Hz 1minute

Shock

Misoperation

98m/s2

resistance

Destructive failure

980m/s2

Vibration

Misoperation

resistance

Destructive failure

10 to 55Hz, 1.5mm DA

Ambient temperature-40 to +105°C (no freezing and condensation)

Mechanical

300,000 cycles

Electrical (N/O) (8)16A- 250Vac at 105°C, 10,000cycles

Life
expectancy

Making 5A,Electrical (N/C) (8)-Carrying 16A, Breaking 5A,
250Vac at 105°C
10,000cycles

WeightApprox. 16g(6) After the rated voltage is applied to the coil for 200ms, the coil excitation voltage is reduced to the holding voltage.
(7) Excluding contact bounce without flywheel coil diode.
(8) This performance is Flux tight type. Regarding performance of plastic sealed type, please contact EM Devices Corporation.
(9) EM Devices recommends that the usage of the coating agent close to the relay is to be avoided.
(10) Please take care of the relay orientation installed in a car to avoid the malfunction by the vibration, impact and so on. If you haveany questions, please contact 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 "AUTOMOTIVE POWER RELAY USER’S MANUAL" in web site.
●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-

https://em-devices.com/en/April, 2024 ERCP23-027-4E

AX1 SERIESCOIL RATING(Ambient temperature: 20°C)
NominalCoilMust

MustVoltage

ResistanceOperate Voltage (11)Release Voltage (11)(VDC)(Ω)±10%

(VDC)

(VDC)

12120

9.6

0.6

Holding voltage(VDC)

NominalOperating Power(W)30~80% of rated voltage (at 23°C)

1.2W

40~45% rated voltage (at 105°C)(11) 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 "AUTOMOTIVE POWER RELAY USER’S MANUAL" in web site.
●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.

-6-

https://em-devices.com/en/April, 2024 ERCP23-027-4E

AX1 SERIESPART NUMBER SYSTEM
AX1S-12H

2 U 1 A S
Enclosure

Nil:

Unsealed (Flux tight)

S:Sealed (Plastic sealed)A:

1 form A

C:

1 form C

Pickup Voltage

1:

9.6V

Contact MaterialU:

Ag alloy

Coil Resistance

2:

120Ω

Contact Gap

H:Standard

Coil Rated Voltage

12:

12V

Rated Current

Nil:

32A

S:

16A

Type
Contact Form

●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 "AUTOMOTIVE POWER RELAY USER’S MANUAL" in web site.
●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.

-7-

https://em-devices.com/en/April, 2024 ERCP23-027-4E