Darlington npn transistors fairchild semiconductor ztx605 darlington transistor npn polarity 120v collector emitter voltage vceo 140v collector base voltage vcbo 10v emitter base voltage veb 1a collector current 1w power 100000 dc current gain hfe 10ua collector cut off current 15v collector emitter saturation voltage 150mhz transition frequency to 92 case 159mg weight tape amp reel 4000 silicon planar construction medium power diodes inc ztx605 darlington npn 12