Losing or breaking a power adapter does not mean you need a new switch, NAS or router. It does mean the replacement has to match the original on four points. Here is how to read them off the device.
1. Look at the label of the original adapter
Every adapter has a printed label with an OUTPUT line, for example:
OUTPUT: 12V ⎈ 5A (60W)
That line is what matters. Ignore the INPUT line — that is the mains side (100–240V) and is the same for virtually every adapter sold in Europe.
If the adapter is gone, the same information is usually printed on the device itself, next to the DC socket or on the sticker on the bottom.
2. Match these four things
| What | Rule |
|---|---|
| Voltage (V) | Must be identical. 12V stays 12V, 19V stays 19V, 48V stays 48V. |
| Current (A) | Must be equal or higher. More amps is safe — the device only draws what it needs. |
| Polarity | The small symbol on the label shows whether the centre pin is + or −. It must be the same. |
| Plug (barrel) size | Must physically fit and make proper contact. 5.5 × 2.5 mm and 5.5 × 2.1 mm look almost identical but are not interchangeable. |
Watts are not a fifth specification — they are simply volts × amps. A 12V 5A adapter is a 60W adapter.
3. Easier: match the OEM part number
Manufacturers print their own part number on the adapter, for example ADS-210NX-48-1, EA10681N-120, PWR-ADAPTER-65W-A01, T090060-2B1 or 311P0W134. This is the most reliable identifier there is.
Type that number, or your device model, into the search box on adapterspot.com and you will get the matching power supply directly. We list the OEM part numbers each of our adapters replaces on every product page.
4. Not sure?
Send us a photo of the label of your old adapter, or of the sticker on your device, to info@adapterspot.com. We will confirm which power supply you need before you order.
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