The RV122K25_-HE from Stackpole Electronics is a Varistor with AC Voltage Rating 750 V, DC Voltage Rating 990 V, Clamping Voltage 1980 V, Capacitance 550 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Through Hole. More details for RV122K25_-HE can be seen below.