Re: Using a higher rated DC transformer

[eschuylerTAKE@xxxxxxxxxxxxxxxxxxx]

"Connah" <connah@xxxxxxxxx> wrote:
>
>Good morning, all.
>
>I have an electronic device that requires a DC Wall transformer rated
>for 12VDC at 600 mA. Unfortunately, I have lost the power supply and I
>cannot find another one with that exact rating. My friendly Radio Shack
>representative tells me that the device only "pulls" what it needs from
>the transformer, the transformer does not "push" that much to the
>device. He tells me I can use a 12vdc at 1A for the device and it will
>work.
>
>Is this true? I do not want to fry my device by "pushing" 400mA more to
>it than it needs. If he is right, may I use a transformer rated for
>12vdc at 2.5 amps protected by the same principle? You can tell I'm not
>an electrical engineer. :) I would appreciate any thoughts. Thank you!
>
>Matthew

Matthew,

This time (surprisingly!), the Radio Shack guy is correct. As long as the
transformer is rated for the same voltage and *at least as much* current,
you'll be fine. The connected device will draw only the current it
requires, regardless of the capacity of the source.

Regards,
Eric