The B72220U2231K501 from TDK Corporation is a Varistor with AC Voltage Rating 230 V, DC Voltage Rating 300 V, Clamping Voltage 595 V, Capacitance 1000 pF, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for B72220U2231K501 can be seen below.