Lightning strikes, power grid fluctuations, and switching transients can generate dangerous surge voltages capable of damaging sensitive electronic components within milliseconds.
This is why Metal Oxide Varistors (MOV) are widely used as a critical first line of defense in modern electronic systems.
How Does an MOV Work?
Under normal operating conditions, an MOV remains in a high-resistance state. When a lightning surge or transient overvoltage occurs, it reacts within nanoseconds, clamping excessive voltage and diverting surge energy away from sensitive circuits. This helps prevent equipment damage, system downtime, and costly field failures.
Typical Applications for MOVs
UPS Systems
Protect power input stages from lightning surges and grid disturbances, helping ensure continuous operation.
Solar Inverters & Energy Storage Systems
Protect DC bus circuits, power modules, and control boards from surge events caused by lightning and switching operations.
Switching Power Supplies
Reduce the risk of damage to rectifiers, MOSFETs, and power management ICs during transient overvoltage events.
Industrial Automation & Control Equipment
Improve reliability in harsh industrial environments where motors, relays, and inductive loads generate frequent voltage spikes.
Security & Surveillance Systems
Protect outdoor cameras, access control systems, and monitoring equipment exposed to lightning-induced surges.
Home Appliances
Provide surge protection for smart appliances such as air conditioners, washing machines, ovens, and refrigerators.
Key Factors When Selecting an MOV
Varistor Voltage (V1mA)
Surge Current Capability
Energy Absorption Capacity
Safety Certifications
At JYH HSU (Dongguan Zhixu Electronics), our MOVs are designed for demanding applications. Whether you’re designing a UPS, solar inverter, industrial controller, security system, or power supply, our engineering team can help you select the right protection solution.
Post time: Jun-15-2026