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.

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.

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!

I needed this to connect my modem to my Ubiquiti Dream router and it works like a charm. It does deliver the superfast 10GB speed to the wife router. I did see a YT video showing that these get pretty hot. I checked with mine and it's pretty hot. To address this, I put a small fan to the adapter to cool it down. I'm not sure if the fan was necessary but I didn't want to take the chance of it damaging the adapter or the router. I guess it's to be expected since you're sending a lot of signals through the line but I'd want better heat management/

If you want 10G and not 2.5 or 5, this is the one you want. I did a good amount of research to find a 10G RJ45 module with a newer low power chipset so it doesn't run scorching hot. I can say after having this installed for a few hours, it's only warm to the touch in an air conditioned server room. This appears to be the Broadcom BCM84891 chipset.

This is for the 80 meter version. It was able to get me full 10GBps on cat 5e run that's about 50 feet long, and going through a patch panel. The 30 meter version got me to 5GBps on the same exact run. The 30 meter version got full 10 GBps on a shorter direct run, not going through any patch panel but still using cat5e. Great products, I get transfers from pc to QNAP at average 500 MB (Megabytes) per second. If transferring to or from an NVME that speed doubles. The QNAP is the other short direct run at 10GBps. Using this in a TP-Link Switch (TL-SG3210XHP-M2), works as expected. It was recognized instantly with no configuration needed to make it work.

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.