Sot 23 general purpose pnp transistors diotec bc858b general purpose transistor pnp polarity 30v collector emitter breakdown voltage 30v collector base breakdown voltage 100ma collector current 031w power 330 dc current gain 200mhz transition frequency sot 23 case 742mg weight low current low voltage suitable for low noise input stages of audio frequency equipment diotec bc858b sot23 pnp transistor