What is a surge suppressor, and why is it important? – TechTarget

Learn about surge suppressors, electronic devices designed to reduce or eliminate damaging voltage spikes on power lines.
A surge suppressor, sometimes optimistically called a surge protector, is a device inserted in the alternating current (AC) utility line and/or telephone line to prevent damage to electronic equipment from voltage spikes, or transients.

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main Surge Protective Device with Undervoltage Protection, 3-Mode, 120-240 VAC 1Ph, Type 2