The 511KD10 is a radial leaded varistor manufactured by Liown. It has a rated voltage of 845V, 0.4W power rating, 200pF capacitance at 1kHz, 69J impact energy rating, 415V, 320V, and 510V of AC voltage tolerance, and a rated current of 2.5kA. It has been approved by the Restriction of Hazardous Substances (ROHS) directive, making it safe and reliable for industrial grade applications.