Metal Oxide Varistor (MOV) · 430 V varistor voltage 275 VAC 20 mm disc through-hole · Surge suppression for line voltage circuits · Bourns MOV-20D431K
Through-hole 20 mm metal oxide varistor for surge suppression in line voltage and power supply circuits. Rated 430 V varistor voltage, 275 VAC continuous and 6.5 kA surge current, commonly used for equipment-level transient protection; actual suitability depends on circuit design and local code requirements.
What this product is for
The Bourns MOV-20D431K is a radial lead metal oxide varistor used to clamp transient overvoltage events in power supplies, line voltage equipment, control panels, telecom equipment and appliances. It is a board-level surge suppression component, not a complete panel surge protective device.
Use for
- Equipment-level surge suppression on 275 VAC circuits
- Power supplies and line voltage input stages
- Industrial controls, appliances and electronic assemblies
- Replacement where the original part number or equivalent electrical ratings match
Avoid for
- Applications requiring a complete Type 1 or Type 2 surge protective device
- Direct substitution without confirming varistor voltage, disc size, lead style and surge rating
- Installations where agency approvals or end-product certification require an exact approved replacement
Best for
Electricians, panel builders, maintenance teams and OEM repair work where a 20 mm through-hole MOV is needed for transient suppression on nominal 275 VAC circuits.
Installed in
Typically soldered onto printed circuit boards in control equipment, power supplies, drives, appliances and other electronic assemblies. The disc body is approximately 20 mm (0.79 in) diameter.
Why this product exists
MOVs are used to absorb short-duration voltage spikes that can damage sensitive components. A common rule of thumb is to match the replacement MOV to the original continuous voltage rating and surge category rather than choosing by disc size alone. Actual protection performance depends on the installation, upstream protection and the transient energy present.
Compared with similar products
Compared with smaller disc MOVs, a 20 mm MOV typically offers higher surge handling. This part is specified at 430 V varistor voltage, 275 VAC continuous, 350 VDC continuous and 6.5 kA maximum surge current. Always confirm lead spacing and exact series requirements before ordering.
Specifications
- Manufacturer: Bourns
- Manufacturer part number: MOV-20D431K
- Product type: Metal oxide varistor (MOV)
- Mounting: Through-hole, radial lead
- Disc size: 20 mm (0.79 in)
- Varistor voltage: 430 V
- Maximum continuous AC voltage: 275 VAC
- Maximum continuous DC voltage: 350 VDC
- Maximum surge current: 6.5 kA
- Tolerance: +/-10%
- Maximum clamping voltage: 710 V
- Typical capacitance: 1116 pF
- Operating temperature: -40 to 105 degC (-40 to 221 degF)
- Compliance: RoHS compliant
- MountingThrough-hole, radial lead
- Operating Temperature-40 to 105 degC (-40 to 221 degF)
- ComplianceRoHS compliant
- Tolerance+/-10%
- Disc Size20 mm (0.79 in)
- BrandsWhite Label
- Stock in Elmira21
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