This is the Hager NBN120 single module 1 Pole Type B 20A 10Ka miniature circuit breaker (MCB). This Hager MCB - part of the NBN Range single pole circuit breaker provides protection and control against overloads and short circuits in commercial and industrial electrical distribution systems.
Note: the NB range of MCBs from Hager are replaced by the NBN range; it may be necessary to remove the bottom din rail clip on the NBN MCB so that it correctly fits to the busbar of the Design Consumer Unit. In a TP&N distribution board this should not be an issue.
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