View 2sa1798 datasheet:

Ordering number:EN3709 PNP Epitaxial Planar Silicon Transistors 2SA1798 20V/8A Switching Applications Features Package Dimensions � Adoption of MBIT processes. unit:mm � Low saturation voltage. 2042A � Fast switching speed. [2SA1798] � Large current capacity. B : Base C : Collector E : Emitter SANYO : TO-126ML Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO �25 V Collector-to-Emitter Voltage VCEO �20 V Emitter-to-Base Voltage VEBO �5 V Collector Current IC �8 A Colletor Current (Pulse) ICP �12 A Base Current IB �1.5 A Collector Dissipation PC 1.5 W Tc=25?C 10 W Junction Temperature Tj 150 ?C Storage Temperature Tstg �55 to +150 ?C Electrical Characteristics at Ta = 25?C Ratings P