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About product and suppliers:
        Alibaba.com offers 1,136,941 power supply products. About 23% of these are switching power supply, 5% are inverters & converters, and 1% are pc power supplies. 

A wide variety of power supply options are available to you, such as 1 - 50w, 500 - 1000w, and 51 - 100w. You can also choose from single, dc, and dual. As well as from free samples, paid samples. 

There are 1,136,572 power supply suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and India, which supply 99%, 1%, and 1% of power supply respectively. 

Power supply products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 328,120 with ISO9001, 121,616 with Other, and 42,569 with OHSAS18001 certification.