The RV391K14_-HE from Stackpole Electronics is a Varistor with AC Voltage Rating 250 V, DC Voltage Rating 320 V, Clamping Voltage 650 V, Capacitance 500 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Through Hole. More details for RV391K14_-HE can be seen below.