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Choosing power supply, how to get the voltage and current ratings?

I need to replace a 9v AC 1000mA adapter for a 9v AC 1000mA device but all I've been able to find is a 9v AC 2000mA adapter.

Will this work or will it fry my device?


Yes, that's fine.
The voltage matches (important point #1), and the adapter can deliver 1000 mA or more (important point #2).

The current rating for a power adapter says how much it can provide; how much it actually does provide is up to the load.
In other words, any adapter that is 9 V and 1000+ mA should work just fine.

| improve this answer | |
  • \$\begingroup\$ Using an adapter rated for a higher current is not always safe! The adapter output voltage may be only be well regulated in the current range for which it was designed, and the open-circuit voltage can be much higher than the rating. \$\endgroup\$ – Ben Voigt Oct 23 '12 at 14:16

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