I have a device that requires 9VAC 600mA power supply, can I use either a 9VAC 500mA or 1000mA power supply?

Question

I don't want to damage it and therefore would like any information whether a power supply has to be identical to the devices requirements in both current and volts!! I was going to get a Regulated supply if this makes any difference...i don't know?!?!?! Thanks in advance

Answer 1

Hi.

You MUST use the 9VAC 1000mA power supply.

Your device will NOT be damaged because the 1000mA specification from the power supply is telling you the MAXIMUM mA it can deliver. With your device, it will only deliver 600mA. So you will be using it at 60% of its capacity, it´s perfect.

If you use the 500 mA power supply, it will try to deliver 600mA but it can´t so in a short period of time, the power supply will stop working and you will have to buy the 1000mA

Have a Nice Day

Answer 2

practically, power requirements are usually overstated.
therefore it MAY work fine on a 500ma supply. If you have a choice us the 1000ma, if not monitor the temp of the 500 while the device is in use for a long period. If it gets too hot or the device's output is weak go bigger.

YOUR BIGGEST concern is that the polarity of the plug is correct. both the device and the supply will show the connector with a + indicated on either the center or the sleeve. both MUST be the same. They are not all + center >> so much for standards.