Varistor Definition

A varistor is a type of electronic component designed to protect electrical circuits from overvoltage surges. It is a voltage-dependent resistor that is capable of significantly reducing the voltage in a circuit when it exceeds a certain threshold. Varistors are commonly used in various electrical and electronic devices, such as power supplies, surge protectors, and electronic control boards. They are particularly useful in preventing damage to sensitive components from high voltage spikes caused by lightning strikes, power surges, or other electrical anomalies. The main advantage of varistors is their ability to quickly absorb and dissipate excess voltage, thereby protecting the circuit from potential damage. They are highly reliable and have a long lifespan, making them suitable for use in a wide range of applications. Overall, varistors are essential components for ensuring the safety and reliability of electrical circuits. They provide a cost-effective and efficient solution for protecting electronic devices from overvoltage conditions, extending their lifespan, and reducing the risk of damage or failure.