Darlington npn transistors st tip122 epitaxial darlington transistor npn polarity 100v collector emitter voltage vceo 100v collector base voltage vcbo 5v emitter base voltage veb 5a collector current 1000 dc current gain hfe 02ma collector cut off current 4v collector emitter saturation voltage to 220 case bulk complementary to tip125126127 suitable for medium power linear switching applications st tip122 darlington npn 100v 5a to220