BUY 2SB1644 https://www.utsource.net/itm/p/753005.html
TRANSISTOR | BJT | PNP | 80V VBRCEO | 4A IC | TO-263AB
Description: The 2SB1644 is a PNP Epitaxial Planar Silicon Transistor designed for use in high-speed switching applications. Features: - Low collector-emitter saturation voltage - High-speed switching - High current gain - Low noise Applications: - High-speed switching circuits - Audio amplifiers - Motor control circuits - Power switching circuits (For reference only)