View sxta42 datasheet:

NPN Silicon High Voltage Transistors SXTA 42 SXTA 43 High breakdown voltage Low collector-emitter saturation voltage Type Marking Ordering Code Pin Configuration Package1) (tape and reel) 1 2 3 SXTA 42 1D Q68000-A8394 B C E SOT-89 SXTA 43 1E Q68000-A8650 Maximum Ratings Parameter Symbol Values Unit SXTA 42 SXTA 43 Collector-emitter voltage VCE0 300 200 V Collector-base voltage VCB0 300 200 Emitter-base voltage VEB0 6 Collector current IC 500 mA Total power dissipation, TS = 130 ?C Ptot 1 W Junction temperature Tj 150 ?C Storage temperature range Tstg – 65 … + 150 Thermal Resistance Junction - ambient2) Rth JA ? 75 K/W Junction - soldering point Rth JS ? 20 1) For detailed information see chapter Package Outlines. 2) Package mounted on epoxy pcb 40 mm ? 40 mm ? 1.5