BUY A1546 https://www.utsource.net/itm/p/1178061.html

The A1546 is a NPN silicon epitaxial planar transistor manufactured by Allegro MicroSystems. It is a low-voltage, high-current transistor designed for use in switching and linear applications. Features: Low voltage (VCE(sat) = 0.3 V max) High current (IC = 500 mA) Low noise Low power dissipation High gain Fast switching Small size Applications: Switching Linear amplifiers Motor control Audio amplifiers Power management Automotive applications (For reference only)