The ERZC20EK911 from Panasonic Corporation is a Varistor with AC Voltage Rating 550 V, DC Voltage Rating 745 V, Clamping Voltage 1500 V, Capacitance 700 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Chassis Mount. More details for ERZC20EK911 can be seen below.