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Using a different psu

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by markchip

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This isn't really an IT problem but I thought I'd ask anyway!

I'm using a Netgear GS105 gigabit switch and the psu has been damaged - the switch supply should be 12V 1A but I have another old Netgear psu (that fits fine) but it is rated at 15V 1A. Am I going to blow the switch if I use this psu even on a temporary basis?

Cheers, Mark

4 replies

by langlier

Using adapters of a higher voltage can be OK for short periods but can cause damage even then. If you are likely to buy a new switch anyway you can use it... but if you plan on keeping this around either get a new adapter or find a universal adapter.

by nicknielsen

Don't use the PSU with the higher voltage, rather find a PSU with a 12V output and a current rating of 1A or higher.

Two rules for substituting PSUs:

1. Always match the voltage.

2. Make sure the PSU current capacity (the "A") is equal to or higher than the capacity of the original PSU.

In your case, for example, you may substitute a 12V 1.5A PSU for the original PSU. If you substitute a PSU with an incorrect voltage, you risk damaging your switch. If you substitute a PSU with too low a current rating, you will probably burn up the PSU.

by markchip

that an answer like this might appear - I certainly had hoped for it! :-)

At least I know not to chance it with this psu! So I'll wander down the road with the switch and look for a 12v/1a that fits - with luck!

I have another 220v switch working in its place for the moment but it is 4 ports short and really noisy - 2 fans.

Thanks, guys!

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