The MGUG040050L2 from Kyocera AVX is a Varistor with AC Voltage Rating 3.5 V, DC Voltage Rating 5 V, Clamping Voltage 50 V, Capacitance 40 pF, Temperature Operating Range -55 to 125 ºC. Tags: Surface Mount. More details for MGUG040050L2 can be seen below.