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When deciding which miniature circuit breaker is best for any application, it is important to determine what type of protection is necessary. For these MCB's, there are two important factors to consider when choosing which breaker is appropriate:
Miniature circuit breakers can come in 7 different trip curve ratings, with B, C and D being the most common. It is imperative that the correct trip curve is chosen the effectively protect the equipment that is downstream from this device. Listed below are the three most common trip curves along with a brief description of suitable applications: