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Quick Transformer Current Output Question. (Volt Amp = ?)

post #1 of 3
9/30/10 at 5:27pm
Thread Starter 

Hi,

 

I'm building a simple 1A power supply for some simple amps I am going to be making. So I am looking for transformers, which is the only thing missing from my shopping cart.

 

I need a transformer with about 2A on the secondary coming from 115-120VAC but all of the transformers on Mouser are speced by VA (volt ampere). Now volt and amp are pretty different so a.) I am unsure what this measurement does, b.) How does it relate to current output?

 

So if something was 30VA, is it possible to convert VA to just straight up A? 

 

Thanks.

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post #2 of 3
9/30/10 at 10:15pm

You need to divide your VA by your secondary.

 

Example with 12V secondary:

30VA / 12V = 2.5 A on secondary.


Edited by johnwmclean - 9/30/10 at 10:17pm
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post #3 of 3
10/1/10 at 1:56pm
Thread Starter 
Quote:
Originally Posted by johnwmclean View Post

You need to divide your VA by your secondary.

 

Example with 12V secondary:

30VA / 12V = 2.5 A on secondary.



Thanks!

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