The B72230M0551M401 from TDK Corporation is a Varistor with AC Voltage Rating 499 V, DC Voltage Rating 750 V, Clamping Voltage 2150 V, Capacitance 900 pF, Temperature Operating Range -40 to 85 Degree C. Tags: PCB Mount, Through Hole. More details for B72230M0551M401 can be seen below.