The RV391K25_-HE from Stackpole Electronics is a Varistor with AC Voltage Rating 250 V, DC Voltage Rating 320 V, Clamping Voltage 650 V, Capacitance 1600 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Through Hole. More details for RV391K25_-HE can be seen below.