View pzta42 datasheet:

NPN Silicon High-Voltage Transistors PZTA 42 PZTA 43 High breakdown voltage Low collector-emitter saturation voltage Complementary types: PZTA 92, PZTA 93 (PNP) Type Marking Ordering Code Pin Configuration Package1) (tape and reel) 1 2 3 4 PZTA 42 PZTA 42 Q62702-Z2035 B C E C SOT-223 PZTA 43 PZTA 43 Q62702-Z2036 Maximum Ratings Parameter Symbol Values Unit PZTA 42 PZTA 43 Collector-emitter voltage VCE0 300 200 V Collector-base voltage VCB0 300 200 Emitter-base voltage VEB0 6 Collector current IC 500 mA Base current IB 100 Total power dissipation, TS = 124 ?C Ptot 1.5 W Junction temperature Tj 150 ?C Storage temperature range Tstg � 65 � + 150 Thermal Resistance Junction - ambient2) Rth JA ? 72 K/W Junction - soldering point Rth JS ? 17 1) For detailed information