The MVS1812B470K-S from Meritek Electronics Corporation is a Varistor with AC Voltage Rating 30 V, DC Voltage Rating 38 V, Clamping Voltage 77 V, Capacitance 2550 pF, Temperature Operating Range -50 to 85 Degree C. Tags: Surface Mount. More details for MVS1812B470K-S can be seen below.