The MCOV should be at least 10-15% higher than the maximum RMS operating voltage of your circuit to account for line fluctuations.
Varistors, MOVs Component Intelligence
Engineered transient voltage suppression for power line and signal integrity.
What are Varistors, MOVs components?
MOVs are voltage-dependent resistors used to shunt transient energy away from sensitive components. Select based on maximum continuous operating voltage (MCOV), energy absorption (Joules), and peak surge current capacity to ensure reliable circuit protection.
How to Choose Varistors, MOVs Components
Selecting the correct MOV requires balancing steady-state voltage with expected transient energy levels.
Operating Voltage
Ensure the MCOV is higher than the maximum expected steady-state line voltage to prevent premature aging.
Energy Rating
Match the Joule rating to the expected transient energy; insufficient ratings lead to device failure.
Clamping Voltage
Verify the clamping voltage is low enough to protect downstream components during a surge event.
Physical Size
Larger disk diameters generally offer higher surge current capacity and energy dissipation.
Response Time
MOVs offer fast response times, but consider parasitic capacitance if used in high-speed signal lines.
Popular Varistors, MOVs Components
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