Zinc Oxide Varistor 14D471K – ZOV

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Zinc Oxide Varistor 14D471K – ZOV The Zinc Oxide Varistor 14D471K is a disc-type surge protection component engineered to absorb high-energy transients and protect sensitive circuitry. As a member of the 14D series, it combines a robust ceramic zinc-oxide element with nickel-plated body finishes to deliver repeatable clamping performance. The device is designed for indoor PCB mounting where transient over-voltage events such as lightning-induced spikes, switching surges, or inductive kickbacks must be limited to safe levels to prevent downstream damage. Functionally, the 14D471K remains electrically passive during normal operation and becomes highly conductive when line voltage exceeds its varistor threshold, diverting surge energy away from protected components. It offers a wide V1mA operating window (nominal 423–517 V) and a high energy absorption capability, enabling it to withstand repeated 10/1000 μs impulses with minimal change in performance. Typical applications include across-the-line and line-to-ground transient suppression in both consumer and industrial electronics. Manufactured with attention to surge life and safety, the 14D471K is available in standard bulk packing and follows recommended soldering and handling guidelines to preserve reliability. Its moderate capacitance and predictable clamping voltage make it suitable for coordination with fuses and other protective devices, and its rated parameters simplify selection for equipment designers seeking economical, high-energy transient protection. Features: Wide operating voltage range (V1mA) suitable for higher-voltage protection applications. Fast response to transient over-voltage events. High transient energy absorption capability for repeated surge events. Low clamping ratio with minimal follow-on current. Nickel-plated body for reliable soldering and environmental protection. Specifications: Specification Value Type / Series: 14D471K (14D series) Varistor Voltage (V1mA): 423 – 517 V Max. Continuous RMS Voltage (VAC): 300 V Max. Continuous DC Voltage (VDC): 385 V Max. Energy (10/1000 μs): 148 J (standard); 205 J (high-surge type) Max. Clamping Voltage (8/20 μs): ≈775 V Withstanding Surge Current (8/20 μs): 50 A (standard rating) Typical Capacitance (@1 kHz): ~420 pF Body / Lead Finish: Nickel plated body; axial leads tin plated Operating / Storage Temperature: -40°C to +125°C (storage) Pinout Diagram: Footprint Diagram: Applications: Surge protection in consumer electronics. Surge protection in industrial electronics. Relay and electromagnetic valve surge absorption. Semiconductor (transistor/diode/IC/thyristor/triac) protection. Surge protection in electronic home appliances, gas and petroleum appliances. Package Contents: 1x Zinc Oxide Varistor 14D471K – ZOV Datasheet