Varistors (15177)

Varistors, also known as voltage-dependent resistors (VDRs), are used to protect electronic circuits from voltage spikes and surges. They change their resistance based on the applied voltage, providing high resistance at normal voltages and low resistance during voltage surges. Varistors are commonly used in power supplies, communication equipment, and industrial control systems to prevent damage from transient voltage events. Their ability to absorb and dissipate excessive energy makes them essential components in overvoltage protection.