BUY Z0409MF https://www.utsource.net/itm/p/11203258.html

Description: Z0409MF is a four-pin NPN transistor with a TO-202 package. Features: Low collector-emitter saturation voltage High current gain High switching speed Low noise High reliability Low collector-emitter leakage current Applications: Audio amplifiers Motor control Switching applications High-frequency circuits High-speed switching circuits (For reference only)