The ACMV-0201-5R5-C400 from Abracon is a Varistor with AC Voltage Rating 4 V, DC Voltage Rating 5.5 V, Clamping Voltage 18 V, Capacitance 40 pF, Temperature Operating Range -55 to 125 ºC. Tags: Surface Mount. More details for ACMV-0201-5R5-C400 can be seen below.