View smbt6428 datasheet:

NPN Silicon Transistors SMBT 6428 SMBT 6429 For AF input stages and driver applications High current gain Low collector-emitter saturation voltage Type Marking Ordering Code Pin Configuration Package1) (tape and reel) 1 2 3 SMBT 6428 s1K Q68000-A8321 B E C SOT-23 SMBT 6429 s1L Q68000-A8322 Maximum Ratings Parameter Symbol Values Unit SMBT 6428 SMBT 6429 Collector-emitter voltage VCE0 50 45 V Collector-base voltage VCB0 60 55 Emitter-base voltage VEB0 6 Collector current IC 200 mA Total power dissipation, TS = 71 ?C Ptot 330 mW Junction temperature Tj 150 ?C Storage temperature range Tstg – 65 … + 150 Thermal Resistance Junction - ambient2) Rth JA ? 310 K/W Junction - soldering point Rth JS ? 240 1) For detailed information see chapter Package Outlines. 2) Packag