05D820K with Varistors 65V 150V 100A Through Hole RoHS manufactured by COV is a disc-shaped, non-linear voltage component used to protect circuits and equipment from overvoltage transients. It is a component manufactured by Shanghai Comar Electronics Co. Ltd., a subsidiary of COV. The 05D820K varistor has a 65V to 150V voltage rating and a current rating of 100A. It features a glass-coated, non-linear metal oxide construction that provides superior surge and ESD protection, is RoHS compliant, and is soldered in through-hole packages. This component is used in applications such as motor control, lighting, and automotive.