AC MCB (Mini circuit breaker) is used in lighting distribution system and/or other electrical systems for protecting overload and short circuit. The product is neoteric in structure, light in weight, reliable and excellent in performance. Its frame and parts adopt plastics of high fire resistant and shockproof. The product, with long life, is mainly used in AC 50Hz single pole 240V or two, three, four poles up to 415V circuit for overload and short circuit protection, as well as for unfrequently switching electric equipment and lighting circuit in normal case.
When contacts open, an arc is drawn. In AC this is usually extinguished by the zero crossing, but DC arcs are not self-extinguishing. This means they can only be extinguished by cooling or mechanical interruption.
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