New 1800V Photorelay Powers Safer and More Efficient High-Voltage EV Batteries
Device Supports the BMS for 800V Batteries for Extending Life and Optimising the Performance of EVs and ESS
Visual Description: The document includes an image depicting a high-voltage battery system for electric vehicles. It features a Toshiba TLX9165T component integrated into the Battery Management System (BMS). The visual also shows temperature indicators, displaying a range from -40°C to +125°C, and a simplified electrical schematic relevant to the high-voltage application.
Düsseldorf, Germany, July 31, 2025 – Toshiba Electronics Europe GmbH (Toshiba) has launched the TLX9165T, an automotive photorelay. This component is housed in a 10-pin SO16L-T package and achieves an output withstand voltage of 1800V (minimum). It is specifically designed to support Battery Management Systems (BMS) for high-voltage, 800V electric vehicle (EV) batteries and battery energy storage systems (ESS).
The increasing adoption of EVs is closely linked to improvements in charging times and extended cruising range. Both factors require more efficient operation of battery systems. BMS are crucial for this efficiency, as they monitor battery charge status and the insulation between the battery and the vehicle body, which is vital for the safe use of high-voltage batteries. In BMS handling high voltages, electrically isolated photorelays are essential. Similarly, energy storage systems (ESS), important for efficient renewable energy operation, utilize comparable BMS configurations.
Photorelays used in these battery systems typically need to withstand a voltage approximately twice the system voltage. For an 800V system, this means an output withstand voltage of over 1600V is required. Toshiba's new TLX9165T photorelay meets and exceeds this requirement. Equipped with a newly developed high-voltage MOSFET, it achieves an output withstand voltage of 1800V (minimum), making it highly suitable for 800V systems.
The 10-pin SO16L-T package of the TLX9165T incorporates a resin with a Comparative Tracking Index (CTI) of 600 or higher, classifying it under Material Group I of the international standard IEC 60664-1. Furthermore, its pin configuration ensures a creepage distance of 7.5mm or more on the light receiver side, which supports an operating voltage of 1500V. The pin pitch and configuration are identical to Toshiba's existing SO16L-T packages (such as TLX9160T and TLX9152M), enabling the common use of PCB pattern designs.
The TLX9165T is a normally open (1-Form-A) device. It features an avalanche current rating of IAV=0.6mA and a high isolation voltage of 5000Vrms (minimum). It is AEC-Q101 qualified and fully compliant with the IEC 60664-1 international standard. Key applications for the TLX9165T include automotive equipment, particularly BMS for monitoring battery voltage, detecting mechanical relay sticking, and ground fault detection, as well as serving as a replacement for mechanical relays.
For more information on the TLX9165T photorelay and Toshiba's range of isolators, solid-state relays, and automotive devices, please visit the Toshiba websites:
About Toshiba Electronics Europe
Toshiba Electronics Europe GmbH (TEE) offers European consumers and businesses a wide variety of hard disk drive (HDD) products and semiconductor solutions for automotive, industrial, IoT, motion control, telecoms, networking, consumer, and white goods applications. Beyond HDDs, the company's portfolio includes power semiconductors, discrete devices like diodes and logic ICs, optical semiconductors, and microcontrollers, as well as application-specific standard products (ASSPs).
TEE also provides SCiB™ battery cells and modules utilizing lithium titanium oxide (LTO) for heavy-duty applications, and Silicon Nitride (SiN) ceramic substrates for power semiconductor modules, inverters, and converters, valued for their heat dissipation characteristics and strength.
TEE is headquartered in Düsseldorf, Germany, with branch offices in France, Italy, Spain, Sweden, and the United Kingdom, offering marketing, sales, and logistics services.
Contact Information
Contact Details for Publication
Toshiba Electronics Europe GmbH, Hansaallee 181, D-40549 Düsseldorf, Germany
Tel: +49 (0) 211 5296 0
Web: www.toshiba.semicon-storage.com/eu/company/news.html
Contact Details for Editorial Enquiries
Michelle Shrimpton, Toshiba Electronics Europe GmbH
Tel: +44 (0)7464 493526
E-mail: MShrimpton@teu.toshiba.de
Issued by
Birgit Schöniger, Publitek
Tel: +49 (0)172 617 8431
Web: www.publitek.com
E-mail: birgit.schoeniger@publitek.com
July 2025
