Electrical resistors are a common electrical component that provide a circuit with electrical resistance. This may be in place to reduce current flow, divide voltages, adjust signal levels, terminate transmission lines, and cater to other operations. Resistors are basic components of electronic circuits, and they may be found in a multitude of electronic devices and networks. Varistors are a special type of resistor, allowing for varying resistance to serve as protective devices against excessive transient voltages. Varistors play important roles in a variety of applications to protect equipment and lines, and they have been prevalent in electronics since the early 1900’s. In this blog, we will provide a short overview on the functionality of varistors, as well as the applications that they benefit.