BUY 2SK1257 https://www.utsource.net/itm/p/1381053.html
TRANSISTOR | MOSFET | N-CHANNEL | 60V VBRDSS | 40A ID | SOT-186
Description: The 2SK1257 is a N-channel MOSFET transistor manufactured by Panasonic. Features: - Low on-resistance - High-speed switching - Low input capacitance - High-voltage withstand Applications: - DC-DC converters - Switching power supplies - Motor control circuits - Lighting control circuits (For reference only)