Launch of Sample Provision for High Voltage AC Relay “AX1-*U*” with 2,000VAC Dielectric Strength Between Open Contacts
EM Devices Corporation (President: Chihiro Yamamoto; Headquarters: Shiroishi City, Miyagi Prefecture) has developed the high voltage AC relay ‘AX1-*U*’, targeting NACS-compatible vehicle chargers and other related applications. The company began offering samples in March 2025.
Product Overview
High Voltage AC Relay
“AX1-*U*”
Product Name
AX1-*W*
*depends on the specifications
Dimensions / Weight
15.8×21.0×20.5mm/ 16g
Contact Type
1a
Contact Rating
16A、32A 277VAC
Coil Rated Voltage
/Power Consumption Power
12VDC/2.8W
Ambient Temperature:
-40℃～+105℃
Dielectric Strength(Between Open Contacts)
2,000VAC, 50/60Hz 1min
Dielectric Strength(Between Coil and Contacts)
4,000VAC, 50/60Hz 1min
Sample Availability
Starting March 2025
Regarding the NACS fast charging standard introduced by Tesla, major automakers such as Ford, General Motors, Toyota, and Nissan have announced their plans to adopt this standard. Other automakers are also expected to follow this trend.
In response to this trend, EM Devices has developed the “AX1-*U*”, which has an even higher withstand voltage of 2,000V, in addition to the standard type with withstand voltage of 1,000V and the high-voltage AC relay “AX1-*W*” with a withstand voltage of 1,500V, and began providing samples in March 2025. Mass production will begin in August 2025. The “AX1-*U*” is the world’s smallest product in its class(*1), and will contribute to the miniaturization of OBC.
Additionally, EM Devices is developing the “BX1-***”, which is also NACS-compliant, has a withstand voltage of 3,000V, and a high capacity of 60A, and we plan to add it to our lineup the near future.
In the rapidly evolving EV market, EM Devices will continue to quickly capture the latest trends and develop products that meet customer needs.
(*1) Based on our research as of March 2025.
Product Datashe
et and Contact Information
Please note that the product specifications and service details mentioned in this news release are current as of the announcement date and are subject to change without notice.
EM Devices Corporation (President: Chihiro Yamamoto; Headquarters: Shiroishi City, Miyagi Prefecture) has developed the high voltage AC relay ‘AX1-*U*’, targeting NACS-compatible vehicle chargers and other related applications. The company began offering samples in March 2025.
Product Overview
High Voltage AC Relay “AX1-*U*”
| Product Name | AX1-*W* *depends on the specifications |
|---|---|
| Dimensions / Weight | 15.8×21.0×20.5mm/ 16g |
| Contact Type | 1a |
| Contact Rating | 16A、32A 277VAC |
| Coil Rated Voltage /Power Consumption Power |
12VDC/2.8W |
| Ambient Temperature: | -40℃～+105℃ |
| Dielectric Strength |
2,000VAC, 50/60Hz 1min |
| Dielectric Strength |
4,000VAC, 50/60Hz 1min |
| Sample Availability | Starting March 2025 |
Regarding the NACS fast charging standard introduced by Tesla, major automakers such as Ford, General Motors, Toyota, and Nissan have announced their plans to adopt this standard. Other automakers are also expected to follow this trend.
In response to this trend, EM Devices has developed the “AX1-*U*”, which has an even higher withstand voltage of 2,000V, in addition to the standard type with withstand voltage of 1,000V and the high-voltage AC relay “AX1-*W*” with a withstand voltage of 1,500V, and began providing samples in March 2025. Mass production will begin in August 2025. The “AX1-*U*” is the world’s smallest product in its class(*1), and will contribute to the miniaturization of OBC.
Additionally, EM Devices is developing the “BX1-***”, which is also NACS-compliant, has a withstand voltage of 3,000V, and a high capacity of 60A, and we plan to add it to our lineup the near future.
In the rapidly evolving EV market, EM Devices will continue to quickly capture the latest trends and develop products that meet customer needs.
(*1) Based on our research as of March 2025.
Product Datashe et and Contact Information
Please note that the product specifications and service details mentioned in this news release are current as of the announcement date and are subject to change without notice.