Guide to DC Power Supplies

Shop multiple DC power supply manufacturers and distributors

Distributors of DC power supplies and DC power supply manufacturers are numerous, so take advantage of that and check for the item you're interested in at multiple sources. You just might save some money.

I recommend: Neeltran Inc. is a fantastic place to start. They cover one of the widest arrays of applications among distributors for DC power systems, including industrial DC power supplies. Lambda Americas also has a wide selection and PHC Enterprise, Inc. is especially good for adapters and small electronics. For CB and ham radio power supplies go to Tripp Lite. Although they do not sell directly to consumers, they do a good job of directing customers to resellers.

Know your application specifications and buy appropriately

It may be obvious that a DC power supply that matches the electrical specifications of your application, but is too big to fit into your electrical equipment, is not the right power supply. And, just as obvious, if the dimensions are right, but the electrical specifications are wrong, that's not the right power supply either. But it is all too easy to forget one or more specs when ordering.

I recommend: Write down the exact specifications you need and, when you've found an appropriate candidate or two from distributors of DC power supplies, verify each of your specs, one by one. Grainger has only a few power supplies available and lists their dimensions, temperature range and voltage, but other units have polarity or come in an array of classifications and capabilities. Some DC power supplies even convert AC mains to multiple low DC voltage outputs.

Repair your DC power supplies

Power supplies can run hot, especially if there are multiple transformers involved. If your equipment fries, don't automatically think replacement. There are repair options.

I recommend: KF Group provides electronics repair quotes via their website. Also, if you need help with industrial-level installation, head to Lee Industrial Contracting.