20mm Metal Oxide Disk Varistors Radial Leaded 10% - StandarD Series - Epcos B72220S0421K101, This varistor is of the metal oxide disk type and has a radial leaded body of diameter 20mm.
The maximum AC operating voltage is 420V and VCLAMP is 680V.
Epcos B72220S0421K101 420V 175J 20mm Standard series Metal Oxide Leaded Varistor