The B72225S4321K101 from TDK Corporation is a Varistor with AC Voltage Rating 320 V, DC Voltage Rating 420 V, Clamping Voltage 840 V, Capacitance 1600 pF, Temperature Operating Range -40 to 105 Degree C. Tags: Through Hole. More details for B72225S4321K101 can be seen below.