STP10NB50 / STP10NB50FP is a N - channel 500V/0.55Ω/10.6A power MOSFET produced by STMicroelectronics. It has low RDS(on), high dv/dt and low gate charge, and is used for high current, high frequency switching, switch mode power supplies, DC-AC converters, welding equipment and uninterruptible power supplies.