10Gtek 𝟴𝟬-𝗠𝗲𝘁𝗲𝗿 𝗟𝗢𝗪 𝗣𝗢𝗪𝗘𝗥 10GBase-T SFP+ to RJ-45 Transceiver, J45 to SFP+ Copper Ethernet CAT.6a Module, for Cisco SFP-10G-T-80, Ubiquiti UniFi, Netgear and More, Pack of 10

I inherited a Netgate XG7100 router/firewall and it has very particular requirements for transceivers. Specifically, that it doesn't support SFP+ to RJ45 devices. This device seems to work perfectly and came up immediately after install. I have been performing load testing and have seen no issues due to overheating or packet loss. EDIT: Since I originally wrote this, I have had one issue where I had to disable and re-enable the interface to bring up the connection. Not sure if the issue was this device or the ISP's ONT it is connected to. No errors were logged leading up to the issue or after the reset. As this listing on Amazon has multiple variants, it is important to note that I am referring to the "10Gtek 𝟴𝟬-𝗠𝗲𝘁𝗲𝗿 𝗟𝗢𝗪 𝗣𝗢𝗪𝗘𝗥 10GBase-T SFP+ to RJ-45 Transceiver". This is the only variant confirmed compatible with the XG7100 due to the specific chipset used in the device. The other devices use a different chipset and are most likely not compatible. This was the most cost effective and simple solution that I found to add 10gb copper to the XG7100. My other options were to get a media converter to take the handoff from the ISP, convert it back to fiber and then connect it to the router. This would have required the purchase of a media converter, two to three transceivers (depending on converter model) and a fiber cable and would be more equipment to mount on the wall. It would also require additional power. The other option would be to purchase a PCIE network adapter, which the XG7100 is also picky about. New models cost about $150, used can go for $35-$100, but it can be guessing game on whether they are reliable and will work. There still be the need to get an SFP+ to RJ45 transceiver. I found this listing referenced in the NetGate forums thread "xg7100-confirmation-if-you-can-plug-in-an-sfp-sfp-to-rj45-adapter"

This was plug and play with my Mikrotik CRS310. I didn't need to change any settings, it instantly detected and linked with my google fiber router at 10g and runs warm to the touch (but not hot). This is the one to get.

Works for Cat 5e. My house is run in Cat 5e and I was worried if this was going to work, and to my surprise and amazement it certainly does! Plug and play, easy to install, would recommend!

It works with most things perfectly fine. On M2 Mac’s sometimes it wouldn’t negotiate 10Gig. I had to pin the Mac to 10G as well as the SFP+ port and then it worked fine.

The new 80-Meter 10GBase-T (ASF-10G-T80) is definitely the one to get if you don't need 2.5Gb or 5Gb. Working great in my UniFi Dream Machine Pro. A lot lower power consumption than other models means cooler running. Feels warm but not burning hot like I have heard others report with other 10GBase-T SFPs.

Performance wise, these are great. They are cheap and perform well. They produce much less heat than other brands that I have tried. However, the reason for the low star is zero support from their company. One of the two SFP+ adapters died during regular use. It just stopped working and stopped being recognized by my switch. I did tried several other switches and it didn't register any response so I'm pretty sure it's dead. I tried to reach them via their online website (from a link i got through amazon product support). I tried to contact them 4 times using the various options available on their website. The number of response i got is zero. So it's a good product while it's working and I have purchased a lot of products from them (fiber cable, SFP+, 10g adapters, etc.) throughout the year, but this is the first time i needed support from them. Extremely disappointed with this and I will have to think twice before buying from them again.

I use the 80m transponders in my home for my 10G network. Both line are around 20m away from the switch. I decided to go with the 80m because it’s a Broadcom chip and it supports longer runs. It does get hot, but it hasn’t cause a problem running two side by side in an Intel x520-DA2 card.

Hot. Had 2 of these that worked both for just over a month then started dropping the connection constantly. Going with a different brand/model next time.