... current Over voltage protection Approved UL, CSA, VDE Zinc oxide varistor diskLow leakage current Over voltage protection Approved UL, CSA, VDE ... arc, noise reduction, the role of protecting the semiconductor components.Varistor voltage; V1ma = 1.5Vp = 2.2VacFlow electric current Capacity: 5D ... a ≥ 30Voltage ratio:V1ma/V0.1ma ≤ 1.08 Zinc Oxide Varistor Disk Zno Varistor zov-20D821K (7D 10D 14D 20D )