MOV 14D621K

A Metal Oxide Varistor (MOV) is a type of voltage-dependent resistor most commonly used to protect electronic devices and electrical circuits from transient voltage spikes or surges. Its essentially a voltage-dependent resistor made from a semiconductor material (typically zinc oxide) with metallic electrodes attached to either end.

Heres how it works:

1. Normal Operation: Under normal operating conditions, the MOV exhibits a high resistance, allowing current to flow through the circuit with minimal interference.

2. Transient Voltage Spike: When a transient voltage spike occurs (such as a lightning strike, power surges, or switching events), the voltage across the MOV increases. When this voltage exceeds a certain threshold known as the "breakdown voltage" or "clamping voltage," the MOVs resistance decreases significantly, effectively shunting excess current away from sensitive components.

3. Protection: By diverting excess voltage away from sensitive components, the MOV protects them from damage that could result from overvoltage conditions.

MOVs are commonly used in various applications including surge protectors, power supplies, motor drives, and electronic devices to safeguard against transient voltage events. They offer fast response times and high surge energy absorption capabilities, making them effective in protecting electronic equipment from voltage surges.