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About product and suppliers:
        Alibaba.com offers 265 12v4a power supply products. About 42% of these are ac/dc adapters, 32% are switching power supply. 

A wide variety of 12v4a power supply options are available to you, such as dc, single, and dual. You can also choose from 1 - 50w, 51 - 100w, and 101 - 200w. As well as from 220v, 110v. And whether 12v4a power supply is free samples, or paid samples. 

There are 265 12v4a power supply suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 12v4a power supply respectively. 

2v4a power supply products are most popular in North America, Domestic Market, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 72 with ISO9001, 5 with Other certification.