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JBTZGQ Surge Protective Device


JBTGQ series self resetting overvoltage and undervoltage protector is applicable to users or loads with single-phase AC voltage of 230V or three-phase voltage of 400V, frequency of 50Hz and rated working current of 63A and below.



JBTGQ is used as the protection of electrical equipment in case of overvoltage and undervoltage of single-phase or three-phase line caused by neutral line fault. It is mainly used for the protection of incoming lines of residential household distribution boxes or distribution lines that need to protect single-phase or three-phase electrical equipment.


Model Explanation

Product Categories

According to the rated current, there are: 25A, 32A. 40A, 50A, 63A;

According to the product pole number, there are: 1P+N, 3P+N;