OPNsense Forum

English Forums => Hardware and Performance => Topic started by: zanfar on March 10, 2026, 03:02:24 AM

Title: DEC740 Power Supply
Post by: zanfar on March 10, 2026, 03:02:24 AM
I bought a DEC740 over a year ago, but shortly had to unexpectedly move. Unfortunately, the DEC power supply either got lost in the move, or was dumped into a box of other random wall-warts and barrel PSUs. So now I either don't have one anymore, or I cannot locate the correct one. None of the bricks I can find have anything close to an OPNsense logo or marking--but I expect the correct PSU won't either.

Can someone provide the specs for the DC Input of the DEC740? Or, at worst, a source to buy a spare?

I have checked all the OPNsense hardware pages and docs, but cannot locate the answer--they only list the AC input of the PSU, not the specs from the PSU to the DEC. If you know where to find it, that would be appreciated as well.

Thanks in advance,
Title: Re: DEC740 Power Supply
Post by: OPNenthu on March 10, 2026, 03:25:10 AM
Check for a sticker on the bottom of the unit.

For example the DEC695 bottom view: https://wiki.junicast.de/en/junicast/review/opnsense_dec695

According to the same site, their DEC740 arrived with a "Meanwell quality power supply 12V 3A."  It's possible Deciso changed suppliers over time or by region.
Title: Re: DEC740 Power Supply
Post by: zanfar on March 10, 2026, 03:49:07 AM
Thank you.

The sticker on the bottom of my unit only has serial, P/N, MAC, and "made in" disclosures.

However, I did find a MeanWell 12V 3A brick in my box of cables which both fits and seems a reasonable specification.