Ultra-compact power relay provides high-voltage battery safety

OMRON Electronic Components Europe has released the G9EJH-1-E ultra-compact DC power relay, supplying a space-saving solution for inrush protection in battery-charging systems up to 800V. With class-leading dimensions of 31mm x 27mm and 30mm high, the relay also meets the IEC 60664 insulation distance specification to fulfil stringent reliability and safety standards.

With its high maximum voltage and industry-standard insulation distance, the device is ideal for use in battery ESS. The compact dimensions and 12V coil-operating voltage simplify integration in EV and PHEV's pre-charging, auxiliary power, and main charging systems. Also, its 800V capability fulfils the requirements of the automotive market as typical vehicle battery voltages continue to rise, targeting greater efficiency and faster charging.

With SPST normally open contacts, the relay operates in series with a current-limiting resistor for inrush protection. Able to carry a sustained current of 15A, and handling inrush current up to 30A, the device operates and releases within 30ms to provide fast-acting protection.

When turned on, the contact resistance is less than 100mΩ, providing minimal power loss. On the other hand, the insulation resistance of 1000MΩ and dielectric strength of 2500V between the coil and contacts assures robust performance in harsh conditions. Housed in a six-pin PCB-mount package, the G9EJH-1-E is ideal for automated or hand soldering and ensures flexibility for assemblers while simplifying field repairs. With a mechanical lifetime rated for over 200,000 operations, and specified for operating temperature from -40C to 85C, the G9EJH-1-E ensures exceptional reliability in automotive and industrial environments. The relays are ready now for use in OBC, EVSE, and grid-connected BESS applications.