20 x 20D102K Metal-Oxide Varistors (MOVs) — 20 mm, ~1000 V, ±10% (K) What it is Pack of 20 metal-oxide varistors, model 20D102K. MOVs are voltage-dependent resistors that respond to voltage transients by clamping spikes to protect downstream circuitry. Key specifications Quantity: 20 pieces Model: 20D102K Disc size: 20 mm Varistor voltage: approximately 1000 V Tolerance: ±10% (K) Package: radial-lead, through-hole Construction: metal-oxide ceramic Key benefits — why you need it Fast transient suppression: reacts quickly to voltage spikes to reduce the risk of immediate component failure. Protects sensitive electronics: helps safeguard power supplies, controllers, and other circuitry from surge-related damage. Reduces downtime: prevents outages and costly repairs by limiting surge impacts. Consistent performance: all parts in the pack meet the same model and tolerance for predictable behavior across replacements. Convenient bulk supply: 20 pieces per pack for maintenance, spares, or multi-board installations. Compatibility and form factor Through-hole radial leads match standard PCB footprints and common MOV module layouts. Suitable for use in both new designs and field maintenance of surge-protection circuits. Intended for higher-voltage surge suppression when used in appropriate circuit contexts and with proper system design. Typical use scenarios Protect the AC mains input of switch-mode power supplies and power adapters from line spikes. Clamp transients across DC rails or transformer primaries in industrial control equipment. Provide line protection for telecom equipment, servers, and consumer electronics against voltage surges. Why choose this pack The 20D102K is a standard, widely supported MOV model for higher-voltage surge suppression. This pack provides a ready supply of reliable, consistent parts for design, repair, and preventive maintenance.