Surge Protection

What is an "automatic cutoff" feature?

A surge suppressor may be protected with a fuse device and meet code in one of two ways. Many open the circuit to the protective element that may be damaged from a large transient; allowing future surges to pass into the "protected equipment" which may cause damage. Some better designs protect the surge protector by fusing in such a way that the fuse opens the circuit to the protective element as well as the protected load. Thus, a failed surge protector will not continue to power the electronic system that it is protecting.