The ERZC20EK431Y from Panasonic Corporation is a Varistor with AC Voltage Rating 275 V, DC Voltage Rating 350 V, Clamping Voltage 350 V, Capacitance 1000 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Chassis Mount. More details for ERZC20EK431Y can be seen below.