Toshiba Electronic Devices & Storage Corporation has introduced the TLX9165T, an automotive-grade photorelay designed for high-voltage battery systems, offering an output withstand voltage of 1800V (min). The new photorelay, launched in a compact 10-pin SO16L-T package, enters volume production starting today.
As the electric vehicle (EV) industry accelerates its shift toward 800V battery architectures to enable faster charging and extended driving ranges, the demand for more robust and efficient battery management systems (BMS) has intensified. Toshiba’s new photorelay is tailored for such high-voltage environments, leveraging a newly developed high-voltage MOSFET to ensure operational safety and system insulation.
Photorelays play a critical role in BMS and energy storage systems (ESS) by electrically isolating control and power circuits. With 400V battery systems currently prevalent in EVs, the industry’s transition to 800V platforms requires components that can handle withstand voltages of 1600V or higher. The TLX9165T addresses this demand with 1800V withstand capability, offering a reliable solution for next-gen EV and renewable energy applications.
The relay’s packaging further enhances its suitability for automotive use. It employs a resin with a Comparative Tracking Index (CTI) of 600, meeting IEC 60664-1 standards for material group I. Its pin configuration ensures a creepage distance of 7.5mm or more on the light receiver side, providing high insulation performance.
Moreover, the TLX9165T maintains compatibility with existing PCB designs due to its shared pin pitch and configuration with Toshiba’s earlier SO16L-T package, enabling easier integration for automotive and industrial manufacturers.
