A new 1500V relay for energy storage and electric vehicle fast-charging applications has been introduced by OMRON Electronic Components Europe, targeting high-voltage pre-charge circuits in next-generation power systems.
The G9KJ PCB-mount relay is designed for use in pre-charging stages within energy storage systems and EV fast chargers, supporting DC-link voltages up to 1500V. Pre-charge circuits are critical in high-voltage systems, diverting capacitive inrush currents through resistance paths to reduce stress on main contactors, DC-link capacitors and protection components.
1500V Relay for Energy Storage and High-Voltage DC Systems
As renewable energy penetration increases, grid-scale and commercial energy storage systems are operating at progressively higher DC voltages, commonly between 600V and 1000V, with some applications reaching 1500V. Similarly, EV battery architectures are moving towards higher voltages to enable faster charging and improved efficiency.
The 1500V relay for energy storage is rated for 25A make current and 5A carry current, with specifications tailored to pre-charge control rather than full load switching. The device measures 37.2mm × 25.5mm × 17mm and is intended as a board-mount alternative to bulkier contactors traditionally used in these circuits.
Reducing component size in high-voltage assemblies can contribute to more compact system layouts and potentially lower material use in power electronics assemblies. With a maximum contact resistance of 100mΩ and coil power consumption of 530mW, the relay is positioned for applications requiring energy-conscious design and thermal management.
High-Voltage Switching in the Energy Transition
The shift towards higher-voltage DC architectures is linked to broader energy transition trends, including the expansion of renewable generation, battery storage integration and ultra-fast EV charging infrastructure. Managing pre-charge currents effectively is essential to prevent component degradation, nuisance trips and long-term reliability issues in high-power systems.
OMRON states that the G9KJ relay is now in production. Further technical specifications are available on the company’s official product page.
Additional coverage on energy storage and electrification technologies can be found in our Energy section.
