The ERZC20EK271 from Panasonic Corporation is a Varistor with AC Voltage Rating 175 V, DC Voltage Rating 225 V, Clamping Voltage 455 V, Capacitance 1400 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Chassis Mount. More details for ERZC20EK271 can be seen below.