The TND20V-391KB00AAA0 from Nippon Chemi Con is a Varistor with AC Voltage Rating 250 V, DC Voltage Rating 320 V, Clamping Voltage 650 V, Capacitance 1400 pF, Temperature Operating Range -40 to 85 Degree C. Tags: Through Hole. More details for TND20V-391KB00AAA0 can be seen below.