ST BTW67 BTW69 Series 50A SCRS handbook
Datasheet
The BTW67 / BTW69 Series is suitable for applications where power handling and power dissipation are critical, such as solid state relays, welding equipment, high power motor control. They offer a superior performance in surge current handling capabilities due to their clip assembly technology. With their internal ceramic pad, they provide high voltage insulation (2500VRMS), complying with UL standards (file ref: E81734).