BUY G4BC40K https://www.utsource.net/itm/p/4478132.html

Description: The G4BC40K is an NPN silicon power transistor manufactured by International Rectifier (IR). Features: - High DC current gain - Low collector-emitter saturation voltage - High collector current capability - Low thermal resistance - Low noise Applications: The G4BC40K is suitable for use in power switching applications such as DC-DC converters, motor control, and other power management applications. (For reference only)