471KD20 20mm 470V Metal Oxide Varistor

471KD20 MOV Varistor (Metal Oxide Varistor)

The 471KD20 is a metal oxide varistor engineered to protect sensitive circuits from sudden voltage spikes and transient surges. With a nominal varistor voltage of 470 V and clamping capabilities reaching 775 V, it effectively absorbs surge energy in AC power lines, power supplies, industrial control systems, and home appliances. Its compact 20 mm disc size supports surge currents up to 6.5 kA and energy ratings as high as 204 joules, providing reliable performance under high-stress conditions.

Designed with zinc oxide composition, the component reacts rapidly to overvoltage, offering resettable protection without follow-on current. Rated for operation between –40 °C and +105 °C, it is well-suited for applications such as relay switching, motor drivers, and LED lighting systems. This component is certified by UL, CSA, and VDE, and meets RoHS compliance standards for environmental safety.

Key Specs

Model: 471KD20 Varistor Voltage (V₁mA): ~470 V Clamping Voltage: ~775 V Maximum Surge Current: 6.5 kA Energy Absorption: 204 J Capacitance @ 1 kHz: ~850 pF Disc Diameter: 20 mm Operating Temperature: –40 °C to +105 °C Certifications: UL, CSA, VDE Compliance: RoHS Material: Zinc oxide (metal oxide varistor)