View 2sd1801 datasheet:

Ordering number:EN2112B PNP/NPN Epitaxial Planar Silicon Transistors 2SB1201/2SD1801 High-Current Switching Applications Applications Package Dimensions · Voltage regulators, relay drivers, lamp drivers, unit:mm electrical equipment. 2045B [2SB1201/2SD1801] Features · Adoption of FBET, MBIT processes. · Large current capacity and wide ASO. · Low collector-to-emitter saturation voltage. · Fast switching speed. · Small and slim package making it easy to make 2SB1201/2SD1801-used sets smaller. 1 : Base 2 : Collector 3 : Emitter 4 : Collector SANYO : TP unit:mm 2044B [2SB1201/2SD1801] 1 : Base 2 : Collector 3 : Emitter 4 : Collector SANYO : TP-FA Any and all SANYO products described or contained herein do not have specifications that can handle applications