The 101KD20J is a varistor manufactured by Yageo. It is a through-hole device with an RoHS compliant finish, and is designed for use in overvoltage protection applications. This varistor provides a breakdown voltage of 20V with a variety of different ratings for surge current, capacitance, and dissipation factor. It features a cylindrical epoxy-coated body with two leaded terminals for easy connection. The design of the varistor provides a high clamping ratio and tripping time with excellent stability over temperature and life.