varisted

Varisted is a term used to describe a type of resistor that exhibits a variable resistance value. Unlike traditional resistors, which have a fixed resistance, varistors are designed to have a resistance that changes in response to an applied voltage or current. This property makes varistors useful in various electronic applications where adaptive resistance is required.

Varistors are typically made from materials such as zinc oxide, silicon carbide, or other semiconducting compounds. The resistance of a varistor decreases as the applied voltage increases, following a non-linear characteristic curve. This behavior is often referred to as the "varistor effect" or "non-linear resistance."

The primary application of varistors is in surge protection devices, where they are used to protect sensitive electronic equipment from voltage spikes and surges. By providing a low resistance path for high-voltage transients, varistors help to divert excess energy away from the protected circuit, thus preventing damage.

Varistors are also used in other applications such as voltage clamping, current limiting, and noise suppression. Their ability to adapt their resistance based on the applied voltage makes them valuable components in various electronic circuits, ensuring stability and protection against voltage fluctuations.