The 14D820K with Varistors 65V 135V 4.5KA Through Hole RoHS manufactured by Hongzhi is an electronic component used for protecting circuits from unwanted voltage and over-current conditions. It is a radial leaded, disc-shaped device with two parallel metal oxide layers separated by an insulating layer. The varistor has a voltage rating of 65V to 135V and a rated current of 4.5KA and supports a through-hole mounting configuration in a RoHS compliant package. Its primary function is to protect circuits from large voltage and current spikes, as well as provide high transient energy absorption up to several joules. This part is suitable for a wide range of applications such as switch mode power supplies, uninterruptible power supplies, and solar energy inverters.