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In general no, it might do some damage to both the equipment and the power supply. In certain specific cases it might be all right if you are able to measure the current to make sure it is 500 mA or less, and you can also ensure that the appliance can withstand 15 v.

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9y ago
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12y ago

No. If you need 15vdc, the 12vdc supply will not provide it, even if it is underloaded.

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Q: Can you use a 15v dc 400ma for 12v dc 750ma?
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What will happen if use a 12v 400ma instead of 12v 500ma?

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