The 511KD14J is a varistor manufactured by Liown that is rated for 845V of working voltage, 0.6W maximum power dissipation, 390pF capacitance at 1kHz, 180J energy absorption, 415V breakdown voltage, 320V let-through voltage, 510V peak surge current, and 6kA peak surge current. The component is RoHS compliant and has a radial leaded structure.