Surge protectors contain a small disc called an MOV (metal oxide varistor). MOVs don't clamp down when there is a sustained electrical overload, only for anomalies like spikes. Though MOVs can ...

Shunt mode and series mode are the two types of surge protection. The most common method is the use of a metal oxide varistor (MOV), which acts like a pressure relief valve to divert the surge to ...