The VS-40TPS12APBF is a 1200 Volt 35 Amp silicon controlled rectifier (SCR) manufactured by Vishay. It is a three-terminal device with a variable gate sensitivity for firing control. It has a planar passivated structure for superior reliability and ruggedness. It offers low thermal resistance and improved surge power capability. It is an ideal choice for motor controls, appliances, lighting controls, and other power applications.