The RS1K-E3/5AT with Rectifiers 800 Volt 1.0A 500ns 30 Amp IFSM is a device manufactured by Vishay that is a high-power fast recovery rectifier diode module designed to protect switching power supplies from over-current events. It is designed for use in very high voltage power electronic systems up to 800 Volts and current up to 30 Amps. It features a high surge capability, low forward voltage drop, and fast recovery time of 500 nanoseconds. This device is suitable for applications in motor drives, power supplies, uninterruptible power supplies and solar converters.