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About product and suppliers:
        Alibaba.com offers 9,951 auto transformer products. About 17% of these are transformers, 3% are voltage regulators/stabilizers, and 1% are other electronic components. 

A wide variety of auto transformer options are available to you, such as three phase, single phase. You can also choose from free samples, paid samples. 

There are 9,882 auto transformer suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 97%, 1%, and 1% of auto transformer respectively. 

Auto transformer products are most popular in Domestic Market, Southeast Asia, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 5,441 with ISO9001, 3,132 with Other, and 809 with ISO14001 certification.