2n4922.pdf datasheet:

INCHANGE Semiconductorisc Silicon NPN Power Transistor 2N4922DESCRIPTIONCollector-Emitter Sustaining Voltage-: V = 60V(Min)CEO(SUS)Low Collector Saturatioin Voltage-: V = 0.6V(Max.)@ I = 1ACE(sat) CWide Area of Safe OperationComplement to Type 2N4919Minimum Lot-to-Lot variations for robust deviceperformance and reliable operationAPPLICATIONSDesigned for driver circuits, switching and amplifierapplications.ABSOLUTE MAXIMUM RATINGS(T =25)aSYMBOL PARAMETER VALUE UNITV Collector-Base Voltage 60 VCBOV Collector-Emitter Voltage 60 VCEOV Emitter-Base Voltage 5 VEBOI Collector Current-Continuous 1 ACI Collector Current-Peak 3 ACMI Collector Current-Continuous 1 ABCollector Power DissipationP 30 WC@ T =25CT Junction Temperature 150 JStorage Temperature Range -65~150 TstgTHERMAL CHARACTERIS