The MVS1812A300M172 from Meritek Electronics Corporation is a Varistor with AC Voltage Rating 23 V, DC Voltage Rating 30 V, Clamping Voltage 77 V, Capacitance 1700 pF, Temperature Operating Range -55 to 125 Degree C. Tags: Surface Mount. More details for MVS1812A300M172 can be seen below.