The B72220U3251K502 from TDK Corporation is a Varistor with AC Voltage Rating 250 V, DC Voltage Rating 320 V, Clamping Voltage 650 V, Capacitance 1300 pF, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for B72220U3251K502 can be seen below.