Omron high-current DC relays for utility storage and charging infrastructure

Omron Electronic Components Europe has launched convenient PCB-mount relays for safety isolation in high-voltage energy-storage systems (ESS) and EV fast chargers

The G9KD series are 1500V DC high-power relays with 100A make current and 150A carry/break current used in ESS power-conditioning circuitry and EV-charger control units. They are also utilised in configuration-switching networks of EV chargers that allow vehicles and service equipment to dynamically adjust charging power to maximise access and reduce wait times.

The Omron G9KD relays can replace traditional contactors, enabling equipment makers to extend PCB integration and automated assembly, reduce manual processes, and enhance reliability in the field. By handling high-carrying and breaking currents at bus voltages of 1000V and higher, the new relays power the evolution of grid-connected energy storage and EV battery systems, delivering higher capacity and output. This strengthens the momentum behind electrification and the energy transition, bringing improvements such as faster EV charging for added convenience and shorter wait times, greater energy efficiency, and more affordable services.

Measuring 60.5mm x 43.5mm x 56.5mm high, the SPST normally open G9KD relays permit more compact equipment designs. The 6mm main-contact gap provides a significant isolation distance, while the initial contact resistance below 4mΩ reduces energy loss and self-heating. A set of 1.0A auxiliary contacts is available as an option, rated 1.0A for contact failure monitoring and diagnostic indication, normally closed, and conforming with IEC/EN60947-4-1.