DEC740 running hot, temperatures 55-60C+

[sleepyal]

Just to provide an update on my situation.  I forgot to mention that the unit sits inside a wall mounted structured cabling/media enclosure.  It is perforated with holes if you see via the link.

Specificially this unit:
https://www.amazon.com/Legrand-ENP3050-NA-Compatible-Electrical-Surge-Protected/dp/B0BZ8HPMK2/ref=sr_1_1?crid=348BMW6N3SRHP&keywords=legrand+ENP3050NA&qid=1701865523&sprefix=legrand+enp3050na%2Caps%2C103&sr=8-1

When I have the door open the temps hover around 48c on the thermal sensor readings even at moderate load.  When I have the door closed the temps hover around 56-57c. 

This leads me to believe that there isn't enough airflow in the enclosure and combined with ambient temperatures is what is causing the unit to have above average temps.  I guess I'll try to possibly install some case fans into cut outs on this enclosure door and see if that helps at all. 

Even so, I don't mind letting the device run hot even at 56-57c as long as it won't cause any damage to the device.

Thank you all for the responses, much appreciated.

[stefan00]

I would try to take the unit outside the wall enclosure and test for a while. The 10G sfp+ RJ45 (10Gbase-T Copper) modules I occasionally use get really hot, no matter how much traffic.

Maybe that adds a lot to ambient temperature in a very dense environment?

For testing, you could also try a 1Gb/s sfp+ copper module, although you won't reach the usual traffic. But they are much cooler.

[sleepyal]

I would try to take the unit outside the wall enclosure and test for a while. The 10G sfp+ RJ45 (10Gbase-T Copper) modules I occasionally use get really hot, no matter how much traffic.

Maybe that adds a lot to ambient temperature in a very dense environment?

For testing, you could also try a 1Gb/s sfp+ copper module, although you won't reach the usual traffic. But they are much cooler.

The 10GB SFP does get very hot so that probably adds to the ambient temperature I would agree.  When I take it out and let it run outside of the media enclosure I get about 45-48C temps which I guess is normal.  I may just end up strapping a 120mm case fan with wire ties to this thing.