The 471KD05J is an EG Series Varistor manufactured by Yageo. The Varistor is a radial-lead, non-polar polymer surface-mount device with four terminals. It has a voltage rating of 470V AC, a capacitance range of 0.022-0.047 micro Farads and a resistance value of 110 ohms. It is RoHS compliant, meaning that it meets the European Union's Restriction of Hazardous Substances Directive. The device is designed for AC line filtering, ESD protection, and overvoltage/surge protection.