The RV331K20_-HE from Stackpole Electronics is a Varistor with AC Voltage Rating 210 V, DC Voltage Rating 275 V, Clamping Voltage 550 V, Capacitance 1200 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Through Hole. More details for RV331K20_-HE can be seen below.