Nominal Amperage

[Clyde Gill]

I know there's nominal voltages for equipment, do amperage ratings
have a similar range?

I'm trying to match an 120V transformer for a 5V/2amp dc device
(router). I have in hand a 5V 2.8 amp transformer... would this blow
it up?

TIA

clyde

 

[tempus fugit]

No.

The xformer only delivers the current that is drawn by the circuit (up to
its max rating). IOW, you could have a 5V/2000000A xformer and it would
still only deliver the current drawn by the circuit. You can think of
current as being pulled, rather than pushed. Sort of like a tap - there is a
great deal of water pressure, but the tap (like the circuit), controls how
much water comes out. Even though there is a lot of water available, the tap
decides how much comes out.

 

[Tim Williams]

IOW, you could have a 5V/2000000A xformer

I want one!!!

(And the superconducting bars to transfer it to the whatever. Ha!)

Tim