The B72230M0421M401 from TDK Corporation is a Varistor with AC Voltage Rating 420 V, DC Voltage Rating 560 V, Clamping Voltage 1800 V, Capacitance 1150 pF, Temperature Operating Range -40 to 85 Degree C. Tags: PCB Mount, Through Hole. More details for B72230M0421M401 can be seen below.