in detailThe COV 05D621K is a Varistor with Through Hole RoHS packaging, rated at 505V-1025V 400A. It has two terminals with lead-bodies made of Tinned Copper Nickel and an axial leaded connection. The metal layer of the component is composed of a zinc oxide (ZnO) which is a semiconductor material. This component has an insulation resistive value between 500V to 1.1KV. It is also UL, CSA, and VDE certified. The storage temperature range of this Varistor is -40°C to 85°C, and its operational temperature range is -30°C to 85°C. This product is RoHS compliant and UL94V-0 certified. Its typical capacitance at rated voltage is 30-250pF. Its maximum leakage current is 0.1µA. The recommended mounting torque is 0.2Nm. The maximum surge current rating is 2KA. The dielectric strength of this Varistor is 1500VAC for 1 minute.