The ERZC20EK471 from Panasonic Corporation is a Varistor with AC Voltage Rating 300 V, DC Voltage Rating 385 V, Clamping Voltage 775 V, Capacitance 950 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Chassis Mount. More details for ERZC20EK471 can be seen below.