The ERZC20EK751 from Panasonic Corporation is a Varistor with AC Voltage Rating 460 V, DC Voltage Rating 615 V, Clamping Voltage 1240 V, Capacitance 800 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Chassis Mount. More details for ERZC20EK751 can be seen below.