2sc4052.pdf datasheet:

Inchange Semiconductor Product Specification Silicon NPN Power Transistors 2SC4052 DESCRIPTION With ITO-220 package Switching power transistor PINNING PIN DESCRIPTION1 Base 2 CollectorFig.1 simplified outline (ITO-220) and symbol 3 EmitterAbsolute maximum ratings(Ta=25) SYMBOL PARAMETER CONDITIONS VALUE UNITVCBO 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 AIBM Base current-Peak 2 APT Total power dissipation TC=25 25 W Tj Junction temperature 150 Tstg Storage temperature -55~150 THERMAL CHARACTERISTICS SYMBOL PARAMETER MAX UNITRth j-C Thermal resistance junction to case 5.0 /W INCHANGE SEMICONDUCTORInchange Semiconductor Product Spec