View ksp44 datasheet:

KSP44/45 NPN EPITAXIAL SILICON TRANSISTOR HIGH VOLTAGE TRANSISTOR TO-92 • Collector-Emitter Voltage: VCEO=KSP44: 400V KSP45: 350V • Collector Dissipation: PC(max)=625mW ABSOLUTE MAXIMUM RATINGS (T =25 ) A Characteristic Symbol Rating Unit Collector Base Voltage VCBO :KST44 500 V :KST45 400 V Collector-Emitter Voltage VCEO :KST44 500 V :KST45 400 V Emitter-Base Voltage VEBO V 6 Collector Current IC mA 300 Collector Dissipation (TA=25 ) PC mW 625 Collector Dissipation (TC=25 ) PC W 1.5 Junction Temperature TJ 150 Storage Temperature TSTG -55~150 1. Emitter 2. Base 3. Collector ELECTRICAL CHARACTERISTICS (T =25 ) A Characteristic Symbol Test Conditions Min Max Unit Collector-Base Breakdown Voltage BVCBO IC=100 , IB=0 V :KST44 500 V :KST45 400