The TND20SV821KB00AAA0 from Nippon Chemi Con is a Varistor with AC Voltage Rating 510 V, DC Voltage Rating 670 V, Clamping Voltage 1355 V, Capacitance 700 pF, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for TND20SV821KB00AAA0 can be seen below.