BUY STB20NK50ZT4 https://www.utsource.net/itm/p/682218.html
RESNET 51-OHM 8-ELEMENT 5% 0.063W THK-FILM CONCAVE SMD-4.0X2.1 TR-7-PL
Description: N-Channel 500V - 0.065 Ohm - 20A - TO-263 Features: Low gate charge Low Crss Avalanche energy rated High current capability Fast switching Improved dv/dt capability High temperature rating Applications: Switching applications Uninterruptible Power Supplies (UPS) High frequency DC-DC converters Motor control General purpose (For reference only)