The TYN804RG is a 800V, 4A low voltage, fast recovery diode from STMicroelectronics. It is designed to be used in rectifier circuits, and has a low forward voltage drop and low reverse recovery time, allowing for high efficiency rectification. The diode has a soft-recovery characteristic, which helps to reduce any associated EMI issues. The diode has a Type-2 package, making it suitable for high-power applications.