The STF4N90K5 is a MOSFET N-channel 900 V, 1.90 Ohm typ., 3A MDmesh K5 Power MOSFET manufactured by STMicroelectronics. It is housed in a TO-220FP package and offers improved figure of merit, a higher avalanche capability, and improved on-state behavior. The STF4N90K5 is designed for applications such as DC-DC converters, motor drives, high-voltage switching, appliances, and other circuits that require high-performance switching. It features low gate charge and low-thermal resistance for superior performance.