View 2sc4578 datasheet:

Ordering number:EN3242 NPN Triple Diffused Planar Silicon Transistor 2SC4578 900V/50mA Switching Applications Features Package Dimensions · High breakdown voltage. unit:mm · Small Cob. 2010C · Wide ASO. [2SC4578] · High reliability (Adoption of HVP process). 10.2 4.5 3.6 5.1 1.3 1.2 1 : Base 0.8 0.4 2 : Collector 1 2 3 3 : Emitter JEDEC : TO-220AB 2.55 2.55 EIAJ : SC-46 Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO 1700 V Collector-to-Emitter Voltage VCEO 900 V Emitter-to-Base Voltage VEBO 5 V Collector Current IC 50 mA Collector Current (Pulse) ICP 150 mA Collector Dissipation PC 1.75 W Junction Temperature Tj 150 ?C Storage Temperature Tstg –55 to +150 ?C Electrical Ch