The ZVX 6 S 0603 300 from Bourns is a Varistor with AC Voltage Rating 6 V, DC Voltage Rating 9 V, Clamping Voltage 20 V, Capacitance 145 pF, Temperature Operating Range -55 to 125 Degree C. Tags: Surface Mount. More details for ZVX 6 S 0603 300 can be seen below.