View 2sd1621 datasheet:

Ordering number:1787A PNP/NPN Epitaxial Planar Silicon Transistors 2SB1121/2SD1621 High-Current Driver Applications Applications Package Dimensions · Voltage regulators, relay drivers, lamp drivers, unit:mm electrical equipment. 2038 [2SB1121/2SD1621] Features · Adoption of FBET, MBIT processes. · Low collector-to-emitter saturation voltage. · Large current capacity and wide ASO. · Fast switching speed. · Very small size making it easy to provide high- density, small-sized hybrid IC’s. E : Emitter C : Collector B : Base ( ) : 2SB1121 SANYO : PCP (Bottom view) Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO (–)30 V Collector-to-Emitter Voltage VCEO (–)25 V Emitter-to-Base Voltage V