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About product and suppliers:
        Alibaba.com offers 138,733 ac dc power supply products. About 31% of these are ac/dc adapters, 30% are switching power supply, and 1% are lighting transformers. 

A wide variety of ac dc power supply options are available to you, such as dc, dual, and triple. You can also choose from 1 - 50w, 51 - 100w, and 101 - 200w. As well as from free samples, paid samples. 

There are 138,348 ac dc power supply suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Hong Kong, which supply 98%, 1%, and 1% of ac dc power supply respectively. 

Ac dc power supply products are most popular in North America, Western Europe, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 36,488 with ISO9001, 8,786 with Other, and 3,059 with ISO14001 certification.