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Osculati marine rated circuit breaker (MRCB) works as a fuse and a circuit breaker at a time, it is resettable and releasable by means of a dedicated lever. Manufactured in compliance with the USA SAEJ1171 and CE28846 Vapor Proof standards, 3000 cycle operating capacity. The new oversized version has 5/16” electrical terminals (instead of typical 1/4") for easier cable connections. This recess model only requires a round bore for installation.