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About product and suppliers:
        Alibaba.com offers 306 12v4a power supply products. About 39% of these are ac/dc adapters, 32% are switching power supply, and 1% are uninterrupted power supply (ups). 

A wide variety of 12v4a power supply options are available to you, such as 1 - 50w, 201 - 300w, and 51 - 100w. You can also choose from single, dc, and multiple. As well as from 220v, 110v. And whether 12v4a power supply is standby, or dc/dc converters. 

There are 306 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, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 89 with ISO9001, 5 with Other, and 4 with ISO14001 certification.