2sc4053.pdf datasheet:

isc Silicon NPN Power Transistors 2SC4053DESCRIPTIONCollector-Emitter Sustaining Voltage-: V = 450V(Min)CEO(SUS)Fast Switching SpeedMinimum Lot-to-Lot variations for robust deviceperformance and reliable operationAPPLICATIONSSwitching regulatorsHigh frequency invertersGeneral purpose power amplifiersABSOLUTE MAXIMUM RATINGS(T =25)aSYMBOL PARAMETER VALUE UNITV Collector-Base Voltage 600 VCBOV Collector-Emitter Voltage 450 VCEOCollector-Emitter VoltageV 600 VCEXV = 5VEBV Emitter-Base Voltage 7 VEBOI Collector Current-Continuous 5 ACI Collector Current-Peak 10 ACMI Base Current-Continuous 2 ABI Base Current-Peak 4 ABMTotal Power DissipationP 50 WT@ T =25CT Junction Temperature 150 JT Storage Temperature Range -55~150 stgTHERMAL CHARACTERISTICSSYMBOL PARAMETER MAX UNITR Therma