Toshiba Releases Its First 200v Transistor Output Automotive Photocoupler
November 22, 2021

Toshiba Electronic Devices & Storage Corporation ("Toshiba") has launched a high voltage transistor output automotive photocoupler, “TLX9188,” for isolated signal communication in automotive equipment, including electric mobility vehicles. Volume shipments start today.

Toshiba: a 200V transistor output photocoupler TLX9188 for automotive applications. (Graphic: Business Wire)

TLX9188’s high voltage photo transistor delivers a collector-emitter voltage rating of 200V, 2.5 times higher than Toshiba’s current TLX9185A, a first for the company[1]. By specifying maximum values for switching characteristics (turn-on time, turn-off time), the new photocoupler can be used as a unidirectional switch. It can also be used in feedback circuits of analog signals in 100V to 200V equipment, helping to reduce the cost of application circuits.

[1] For an automotive photocoupler

Automotive equipment

  • Battery Management Systems:voltage monitoring, mechanical relay sticking detection, ground fault detection, etc.
  • Feedback of analog signals, etc.


  • High collector-emitter breakdown voltage: V(BR)CEO=200V (min)
  • High current transfer ratio: IC/IF=100% (min), rank GB
  • High isolation voltage: BVS=3750Vrms (min)
  • Wide operating temperature rating range: Topr= -40 to 125°C
  • AEC-Q101 qualified
  • IATF 16949 certified

Main Specifications

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