High power npn transistors on semiconductor 2n3055g high power transistor npn polarity 60v collector emitter breakdown voltage 100v collector base breakdown voltage 15a collector current 115w power 5 dc current gain 25mhz transition frequency to 3 case epitaxial planar construction designed for driver stages in hi fi amplifiers and television circuits on semiconductor 2n3055g npn bipolat transistor 15a 60v to204aa