View smbta42 datasheet:

NPN Silicon Transistors for High Voltages SMBTA 42 SMBTA 43 High breakdown voltage Low collector-emitter saturation voltage Complementary types: SMBTA 92, SMBTA 93 (PNP) Type Marking Ordering Code Pin Configuration Package1) (tape and reel) 1 2 3 SMBTA 42 s1D Q68000-A6478 B E C SOT-23 SMBTA 43 s1E Q68000-A6482 Maximum Ratings Parameter Symbol Values Unit SMBTA 42 SMBTA 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 = 74 ?C Ptot 360 mW Junction temperature Tj 150 ?C Storage temperature range Tstg – 65 … + 150 Thermal Resistance Junction - ambient2) Rth JA ? 280 K/W Junction - soldering point Rth JS ? 210 1) For detailed informati