View 2sc4427 datasheet:

Ordering number:EN2850 NPN Triple Diffused Planar Silicon Transistor 2SC4427 800V/4.5A Switching Regulator Applications Features Package Dimensions · High breakdown voltage, high reliability. unit:mm · Fast switching speed (tf : 0.1µ s typ). 2039D · Wide ASO. [2SC4427] · Adoption of MBIT process. 16.0 5.6 3.4 · Micaless package facilitating easy mounting. 3.1 2.8 2.0 2.0 1.0 0.6 1 : Base 1 2 3 2 : Collector 3 : Emitter 5.45 5.45 SANYO : TO-3PML Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO 1100 V Collector-to-Emitter Voltage VCEO 800 V Emitter-to-Base Voltage VEBO 7 V Collector Current IC 4.5 A Collector Current (Pulse) ICP PW? 300µ s, duty cycle? 10% 15 A Base Current IB 2