BUY BU2520DF https://www.utsource.net/itm/p/106002.html
Silicon Diffused Power Transistor
Description: The BU2520DF is a NPN silicon power transistor in a TO-3P package. Features: High current (IC = 8 A) High voltage (VCEO = 800 V) Low saturation voltage (VCE(sat) = 1.2 V @ IC = 8 A) High switching speed High reliability Applications: Switching power supplies Motor control Lighting control General purpose switching applications (For reference only)