The MOV-20D511K from Bourns is a Varistor with AC Voltage Rating 320 to 415 V, DC Voltage Rating 459 to 561 V, Clamping Voltage 845 V, Capacitance 936 pF, Temperature Operating Range -40 to 105 ºC. Tags: Through Hole. More details for MOV-20D511K can be seen below.