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About product and suppliers:
        Alibaba.com offers 1,224 3 phase mcb products. About 78% of these are circuit breakers. 

A wide variety of 3 phase mcb options are available to you, such as mini, air, and earth leakage. You can also choose from 3, 1, and 4. As well as from free samples, paid samples. 

There are 1,224 3 phase mcb suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Japan, and Taiwan, which supply 98%, 1%, and 1% of 3 phase mcb respectively. 

 phase mcb products are most popular in Southeast Asia, South America, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 1,224 with Other, 406 with ISO9001, and 157 with ISO14001 certification.