View 2sd1799 datasheet:

Ordering number:EN2110B NPN Epitaxial Planar Silicon Transistor 2SD1799 Driver Applications Applications Package Dimensions · Motor drivers, printer hammer drivers, relay drivers, unit:mm voltage regulator control. 2045B [2SD1799] 6.5 Features 2.3 5.0 0.5 4 · High DC current gain (hFE? 4000). · Wide ASO. · Large current capacity. · Small and slim package making it easy to make 2SD1799-applied sets smaller. 0.85 0.7 1.2 1 : Base 0.6 0.5 2 : Collector 3 : Emitter 1 2 3 4 : Collector 2.3 2.3 SANYO : TP unit:mm 2044B [2SD1799] 6.5 2.3 5.0 0.5 4 0.5 0.85 1 2 3 1 : Base 0.6 1.2 2 : Collector 0~0.2 3 : Emitter 4 : Collector 2.3 2.3 SANYO : TP-FA Any and all SANYO products described or contained herein do not have specifications that can handl