Darlington npn transistors st tip142 darlington power transistor npn polarity 100v collector emitter voltage vceo 100v collector base voltage vcbo 5v emitter base voltage veb 10a collector current 125w power 500 dc current gain hfe 1ma collector cut off current 3v collector emitter saturation voltage to 247 case tube monolithic darlington configuration integrated anti parallel collector emitter diode typical applications includes linear and switching industrial equipment