Surge Arrestor BT21A

Surge Arrestor BT21AThe Surge Protector 21A is 3 pole over voltage gas discharge type surge protector with integral fail safe facility and a lower spark over-voltage thereby offering a greater level of prot.4A).Gas Tube Arrestors protect electrical and electronic equipment from high voltage and current surges experienced during lightening strikes or switching and main faultsThe Surge Protector 21A is 3 pole over voltage gas discharge type surge protector with integral fail safe facility and a lower spark over-voltage thereby offering a greater level of protection (This has superseded the protector 14A).

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