The MUR440GR with Diodes - Rectifiers - Fast Recovery DO-27 RoHS is a four ampere, 400V rectifier diode made by the electronics manufacturer Pingwei. The diode is designed for use in applications where high-frequency switching and low turn-on time is required, and it has a recovery time of 4 nanoseconds. It is made with a RoHS-compliant construction that is lead-free and does not contain hazardous chemicals. The MUR440GR is designed to withstand high temperatures, making it suitable for applications with wide temperature ranges, and it has a low power loss. It is a robust and reliable component that is designed for heavy-duty use and is suitable for industrial control, power supply, and electronic equipment applications.