The VDRH20X510ByE from Vishay is a Varistor with AC Voltage Rating 510 V, DC Voltage Rating 670 V, Clamping Voltage 1355 V, Capacitance 400 pF, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for VDRH20X510ByE can be seen below.