View 2sa1898 datasheet:

Ordering number:5049 PNP Epitaxial Planar Silicon Transistor 2SA1898 DC/DC Converter Application Applications Package Dimensions · High-speed switching. unit:mm 2038A Features [2SA1898] · Adoption of FBET and MBIT processes. · Large current capacity. · Low collector-to-emitter saturation voltage. · Fast switching speed. 1 : Base 2 : Collector 3 :Emitter SANYO : PCP (Bottom view) Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO –15 V Collector-to-Emitter Voltage VCEO –15 V Emitter-to-Base Voltage VEBO –5 V Collector Current IC –3 A Collector Current (Pulse) ICP –5 A Base Current IB –600 mA Mounted on ceramic board (250mm2?0.8mm) Collector Dissipation PC 1.3 W Junction Temperature Tj