The TND20V-390KB00AAA0 from Nippon Chemi Con is a Varistor with AC Voltage Rating 25 V, DC Voltage Rating 30 V, Clamping Voltage 77 V, Capacitance 21000 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Through Hole. More details for TND20V-390KB00AAA0 can be seen below.