The VDRUS20Z320ByE from Vishay is a Varistor with AC Voltage Rating 320 V, DC Voltage Rating 420 V, Clamping Voltage 842 V, Capacitance 750 pF, Temperature Operating Range -40 to 125 ºC. Tags: Through Hole. More details for VDRUS20Z320ByE can be seen below.