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
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.
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