The ZVX 8 S 0603 300 from Bourns is a Varistor with AC Voltage Rating 8 V, DC Voltage Rating 12 V, Clamping Voltage 25 V, Capacitance 135 pF, Temperature Operating Range -55 to 125 Degree C. Tags: Surface Mount. More details for ZVX 8 S 0603 300 can be seen below.