For extending the driving range and improving safety of EVs! This is a high-voltage DC relay for EVs that is compact, low-cost, and excels in short-circuit resistance and impact performance.
As the recognition of EVs spreads and their adoption progresses, the challenges are also becoming apparent. Compared to internal combustion vehicles, issues such as the cost of batteries and the need to lighten the vehicle body to extend driving range are becoming more evident. Additionally, safety concerns, such as the risk of fires during collisions, are attracting attention. As a relay manufacturer, we have developed the "ER250" as our solution to these challenges faced by automotive manufacturers regarding EVs. The "ER250" adopts a structure that does not use ceramics, which are commonly used in general relays, making it a more compact and cost-effective product. Furthermore, through our unique contact structure, we have achieved the world's best short-circuit withstand performance of 20kA. Additionally, by employing a hinge structure, which is our specialty, we have also achieved the world's best shock resistance performance for automotive high-voltage DC relays of 1000m/s². 【Features】 ■ High short-circuit withstand (20kA) ■ High current conduction (250A rated current) ■ Compact size ■ High heat resistance ■ Plastic seal structure ■ Lead-free compliant *For more details, please download the PDF or feel free to contact us.
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basic information
【Specifications (Partial)】 ■Contact Configuration: 1 form A (1 form X) * with polarity ■Contact Material: Silver alloy ■Operating Time: Maximum 50ms ■Release Time: Maximum 30ms ■Insulation Resistance: 100Ω (1000Vdc) *For more details, please download the PDF or feel free to contact us.
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【Applications】 ■ Battery disconnection units and junction boxes for electric vehicles (PHEV, BEV, or FCV) ■ Fast charging ■ High voltage applications for hybrid construction machinery, etc. *For more details, please download the PDF or feel free to contact us.
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Company information
EM Devices started with relay development in the NEC Communications Division in 1955. Since then, we have been involved in relays for telecommunications, industrial, and automotive applications, and our products are used by customers around the world, including in Europe, North America, China, South Korea, and India. EM Devices' relays are adopted in various fields, including electronic devices and automobiles. In 2022, we established the "NEXEM Advanced Technology Center (NATC)" within Tohoku University. Collaborating with Tohoku University, which has world-class research capabilities, we are advancing the development of high-performance relays for electric vehicles, with plans to start providing them to customers in 2025. By merging our long-standing achievements with cutting-edge technology, we will continue to deliver high-quality and reliable products.