Sot 23 500mw medium power pnp transistors zetex fmmt593 high voltage transistor pnp polarity 100v collector emitter breakdown voltage 120v collector base breakdown voltage 1a collector current 0 5w power 300 dc current gain 50mhz transition frequency sot 23 case 8mg weight zetex fmmt series silicon planar construction zetex fmmt593 sot23 pnp transistor