Wall Wart Replacement source NOT RS

Regulated or unregulated?

If it isn't on their website, ask for their printed catalog. There are 9 pages (small print) of wall wart and tabletop power supplies in the current edition.

Have you tried the usual suspects? Digkey, Mouser, or Newark.

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I think you're overly optimistic on the price.

Run of the mill, and cheap, tend to be low current. Once you get up to 1amp, I'd say the price rises. And by 2amps, they are less common so the price goes up even further.

Given that this is a 5vdc adaptor, it's also not likely to be run of the mill. The voltage suggests it runs logic devices, and hence needs that 5v to be regulated, which will add to the cost. The cheap adaptors don't regulate, and so use less circuitry.

Michael

. . .

replacements

BC Micro has a 5V 2A wall wart for $3.99 with 1.6mm plug.

See it at

.

I don't know about their minimum purchase or handling charge, but it might be worth it for you to have a look.

From the current rating (2.0 A), it sounds like a regulated switcher. This is not a $3 item. This one should cost $20-$40 in single quantities.

I'm not sure he realized that this is not like the cheap wall warts (like 9 V unregulated 300 mA) that we so often see.

5 volts at 2 amps, regulated, is not a $3 item. It sounds like a regulated switcher that should cost $20-$40.

This

9

5V 4A $8.50 5V 3A $4.99 5V 2A $3.99

I didn't check

but they might have something also

Norm

Of course, you are pointing to two companies that I think of as surplus outlets

I'm with Michael, 5v at 2Amps is not so common, and not so cheap, at "regular" places like Radio Shack. The fact that one can apparently can get them at surplus outlets does not mean $20 or whatever is overpriced.

I've bought plenty of simple switching supplies at the local surplus outlet for a couple of dollars each, but that doesn't mean I can expect to get them everywhere for such a low price.

Michael

Well I think you miss the point. The reason you can get them so easily surplus is that in quantities of about 500 they are $2.56 from at least six different suppliers. But if you want only a few. The surplus house is the better deal since the manufactured have a minimum billing or sell samples for $20 to $50. The fair price if you want a custom, but common, the surplus is a deal!

(like

Of course not. But for the OP's one-off, it's probably the best deal he can get. That who the post was addressed to.

Norm

:The voltage suggests it runs logic devices, :and hence needs that 5v to be regulated : Michael Black

Before I hooked a cheap unit to anything critical, I'd check its output open-circuit and full-load (2.5 ohm 10W resistor). If it's outside the 4.75V - 5.25V spec for TTL, I'd reconsider.

Even if the cheapie won't do this job, you're not out much $, and you can keep it for other stuff or re-sell it.

I won't say that I've bought hundreds of wall warts from these supplies, but it does run into several dozen with a variety of specifications and there's been no bad ones (yet). I doubt that they check each unit and I assume that each one has gone through whatever it's manufacturer deems an appropriate quality control procedure, but I do look at every one with a scope to see if the output looks reasonable and I do meter the voltage. I think I'd do this if I bought them from Jameco or Digikey too. And many of these are "name" brand units that were surplus, not just cheap knock-offs.

Norm