TOSHIBA Photocoupler Photorelay TLX9175J Battery Control in Automotive Equipment Fuel Battery Control in Automotive Equipment Application for Electrical Vehicle Unit: mm The Toshiba TLX9175J consists of an infrared LED optically coupled to a photo-MOSFET in a SO6 package. This coupler use high voltage MOSFET between output terminals. It adequate for the applications of Battery Control Systems. Normally open (1-Form-A) device Peak off-state voltage: 600 V (min) Tri.