2sc4052.pdf datasheet:

Inchange Semiconductor Product Specification Silicon NPN Power Transistors 2SC4052 DESCRIPTION With ITO-220 package Switching power transistor PINNING PIN DESCRIPTION 1 Base 2 Collector Fig.1 simplified outline (ITO-220) and symbol 3 Emitter Absolute maximum ratings(Ta=25 ) SYMBOL PARAMETER CONDITIONS VALUE UNIT VCBO Collector-base voltage Open emitter 600 V VCEO Collector-emitter voltage Open base 450 V VEBO Emitter-base voltage Open collector 7 V IC Collector current 3 A ICM Collector current-Peak 6 A IB Base current 1 A IBM Base current-Peak 2 A PT Total power dissipation TC=25 25 W Tj Junction temperature 150 Tstg Storage temperature -55 150 THERMAL CHARACTERISTICS SYMBOL PARAMETER MAX UNIT Rth j-C Thermal resistance junction to case 5.0 /W INCHANGE SEMICONDUCTOR Inchange Semiconductor Product Spec