View ksp42 datasheet:

KSP42/43 NPN EPITAXIAL SILICON TRANSISTOR HIGH VOLTAGE TRANSISTOR TO-92 • Collector-Emitter Voltage: VCEO=KSP42: 300V KSP43: 200V • Collector Dissipation: PC(max)=625mW ABSOLUTE MAXIMUM RATINGS (T =25 ) A Characteristic Symbol Rating Unit Collector Base Voltage VCBO KST42 300 V KST43 200 V Collector-Emitter Voltage VCEO KST42 300 V KST43 200 V Emitter-Base Voltage VEBO V 6 Collector Current IC mA 500 Collector Dissipation PC mW 625 Junction Temperature TJ 150 Storage Temperature TSTG 357 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 , IE=0 :KST42 300 V :KST43 200 V Collector -Emitter Breakdown Voltage BVCEO IC=1mA, IB=0 :KST42 30