TLX9165T photorelay delivers 1500V protection

The TLX9165T photorelay is a high-reliability automotive device developed by Toshiba. It is engineered specifically for high-voltage battery management systems (BMS) in electric vehicles and energy storage systems. Toshiba releases a new 1800V automotive photorelay for high-voltage EV batteries. Here EV is Electrical Vehicle.

TLX9161T photorelay Features & Specifications

Key features of the TLX9165T photorelay are given below.

Package: Surface-mount, 10-pin SO16L-T (approx. 10.3 × 10 × 2.45 mm)
Output Withstand Voltage (Off-State Voltage): ≥ 1800 V, making it suitable for 800 V battery systems.
On-State Current: Maximum 30 mA
Isolation Voltage: 5000 Vrms, ensuring robust electrical isolation between control and load sides.
On-State Resistance: Up to 340 Ω (for short durations, t < 1 s)
Trigger LED Current: Maximum 3 mA
Operating Temperature Range: –40 °C to +125 °C, fitting harsh automotive environments
Creepage/Clearance Distance: ≥ 8 mm; outer resin CTI > 600, compliant with IEC 60664-1 safety standards

TLX9161T photorelay Applications

Battery Management Systems (BMS) in electric vehicles, for monitoring battery voltage, detecting relay sticking, and fault detection.
Fuel battery control systems in vehicles.
Energy Storage Systems (ESS), which require high-voltage isolation similar to EV battery setups.
Replacement for mechanical relays, offering faster switching and longer reliability

The company said about TLX9161T photorelay

“Intended to block 1 kVAC as well as 1.5 kVDC, the device is packaged in a 7.76 x 10 x 2.45 mm SO12L-T, whose resin has a CTI exceeding 600 and achieves creepage and clearance distances of 8 mm, ‘confirming isolation operating from -40 to +125°C, making it fully compliant with AEC-Q101 Grade 1.
“By reducing the size of the built-in MOSFET chip, Toshiba has enabled the new photorelay to be housed in an SO12L-T package, which is approximately 25% smaller than the SO16L-T package used for its predecessor, the TLX9160T. Despite the smaller package, the TLX9161T maintains the same pin pitch and pin layout as the SO16L-T, allowing for common use of circuit board pattern designs.”