The B72220W2171K501 from TDK Corporation is a Varistor with AC Voltage Rating 175 V, DC Voltage Rating 225 V, Clamping Voltage 455 V, Capacitance 1350 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Through Hole. More details for B72220W2171K501 can be seen below.