The OV 40 K 155 MX 122 from Bourns is a Varistor with AC Voltage Rating 40 V, DC Voltage Rating 56 V, Clamping Voltage 110 V, Capacitance 1500 pF, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for OV 40 K 155 MX 122 can be seen below.