The CNR-05D471K is a through hole metal oxide varistor (MOV) produced by China Ningbo Riyue Electronics. The component is designed specifically for surge protection applications, and is characterized by a fast response time for clamping excess transients. This component is RoHS compliant and made of tin-plated copper material for better conductivity. Its operating voltage rating is from 30VAC to 1500VAC, and its maximum current rating is up to 3.5A. It is also designed to provide an open time of 3.5 seconds or less. The device is provided in a compact, robust package suitable for board mounting and has a maximum pulse power dissipation rating of 550 Watts.