High power npn transistors trusemi tip31 power transistor npn polarity 40v collector emitter breakdown voltage 40v collector base breakdown voltage 2a collector current 2w power 25 dc current gain 3mhz transition frequency to 220 case 198g weight suitable for a wide variety of switching and amplifier applications series and shunt regulators driver and output stages of hi fi amplifiers trusemi tip31a to220 transistor npn 60v