View 2sa1797-p datasheet:

SMD Type Transistors Power Transistor 2SA1797 SOT-89 Unit mm +0.1 4.50-0.1 1.50+0.1 -0.1 1.80+0.1 -0.1 Features Low saturation voltage. VCE(sat)=-0.35V(Max.) at IC / IB=-1A/-50mA. 0.48+0.1 0.53+0.1 0.44+0.1 -0.1 -0.1 -0.1 Excellent DC current gain characteristics. Complements the 2SA1797 and 2SC4672. 1. Base 3.00+0.1 -0.1 2. Collector 3. Emiitter Absolute Maximum Ratings Ta = 25 Parameter Symbol Rating Unit Collector-emitter Voltage VCEO -50 V Collector-base Voltage VCBO -50 V Emitter-base Voltage VEBO -6 V Collector current IC -3 A Collector power dissipation PC 0.5 W Jumction temperature Tj 150 Storage temperature Tstg -55 to +150 Electrical Characteristics Ta = 25 Parameter Symbol Testconditons Min Typ Max Unit Collector-emitter breakdown voltage BVCEO IC = -1mA -50 V Collector-base breakdown voltae BVCBO IC =-50 A -50 V Emitter-base breakdown volt... See More ⇒

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