The B72225M0321M201 from TDK Corporation is a Varistor with AC Voltage Rating 320 V, DC Voltage Rating 420 V, Clamping Voltage 1700 V, Capacitance 1090 pF, Temperature Operating Range -40 to 85 Degree C. Tags: PCB Mount, Through Hole. More details for B72225M0321M201 can be seen below.