The 1N4937 is a fast recovery rectifier diode with a DO-41 package and RoHS compliance. It has a glass molded cavity package with an epoxy seal and is designed for general-purpose use in power-supply applications, as well as in converters for high-frequency switching and line voltage applications. This diode manufactured by Yangjie has a current rating of 1A and a reverse voltage of 300V, and operating temperature of -65°C to +150°C. It has fast recovery time of around 2ns and a peak repetitive reverse voltage of 400V. It is designed with reliable performance, low power dissipation, and a long service life.