The SM6T22CAY is an N-channel MOSFET transistor manufactured by STMicroelectronics. It is designed for power switching applications, including DC/DC converters, high-speed switching circuits, and automotive electronics. This part comes in a TO-263 5-pin package and has a drain-source voltage rating of 600 V and a maximum current rating of 43 A. The transistor has low gate capacitance, low total gate charge, and low forward and reverse recovery times, making it an ideal choice for high speed and high current applications.