BUY MJE521 https://www.utsource.net/itm/p/846963.html
Silicon NPN TransistorNPN
Description: The MJE521 is a silicon NPN power transistor designed for use in general purpose amplifier and switching applications. Features: Collector-Emitter Voltage: VCEO = 80 V Collector-Base Voltage: VCBO = 100 V Collector Current: IC = 4.0 A Power Dissipation: PC = 25 W Operating and Storage Junction Temperature Range: TJ, Tstg = -55 to +150 °C Applications: General purpose amplifier Switching applications (For reference only)