The 5D271K is a varistor with through hole RoHS manufactured by SOCAY. It is an overvoltage protection device which is designed to provide protection against electrical transients in electronic circuits caused by overvoltages. It has a rated voltage of 271 volts, a maximum current of 0.2 amperes, impedance of 300 ohms at 10 kHz, and a noise absorption of 30 dB from 1 kHz to 100 kHz. The 5D271K is a RoHS-compliant component, meaning that it has been certified as compliant with the Restriction of Hazardous Substances Directive (RoHS) issued by the European Union. The device is lead-free, with none of the hazardous elements such as lead, mercury, cadmium, hexavalent chromium, or polybrominated biphenyls used in its production.