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Do all Hatch Surge Protectors have over-current protection built in?

The LSP3 and LSP10 series have built in over-current protection. The over-current protection is triggered when the surge protector begins to conduct at normal line voltage levels through the use of a thermal protection circuit. The LSP4 series does not have built in thermal protection. These surge protectors are intended for use in combination with properly rated overcurrent protection and in accordance with the intended application.