NVD series of varistors are non-polarized and available in 5, 7, 10, 14 and 20mm (diameter) sizes. Varistor voltages ranges are from 18 ~ 1800 volt. Maximum allowable voltage rating range from 11 ~ 1000 volt (AC) and 14 ~ 1465 volt (DC). Maximum peak current ratings range from 50 ~ 2500 amps. All ratings are dependent upon the type of varistor selected. NVD varistors feature UL94V-O rating flame retardant coating and are available in ammo or bulk packaging.