A thermal fuse is placed within this filtering circuit, so that an extended overvoltage which will produce a marked heating effect on the Choke Coil Inductors, will be detected, resulting in a the automatic shutdown of the Surge Suppressor outlets. This combined approach continues our commitment, since 1982, to include effective and safe electrical noise filtration, in all of our IEEE Category A suppression circuits.
Fuse opens automatically if surge exceeds protection capability.