The CS10N65FA9HD MOSFET N Channel 650V 10A(Tc) 4V @ 250uA 850mO @ 5A,10V TO-220F(TO-220IS) RoHS, manufactured by Huajing, is a semiconductor device that functions as an electrical switch. It can be used to regulate/control/carry current in applications such as power converters, motor drivers, and other high power devices. This part is a RoHS compliant piece, meaning that it is free of hazardous materials like lead. It's case is TO-220F (TO-220IS) which means it is a flatpack mounted version of the popular TO-220 package. It can handle up to 650V at 10A(Tc), and a maximum gate source voltage (Vgs) of 4V @ 250uA. Its on-state resistance (RDS(on)) is 850mO @ 5A, 10V. The transistor has a high input impedance and low output impedance, meaning it will draw less current and require less energy for the same amount of work, leading to faster speeds.