Are these the MikroTik branded 10GBase-T modules (S+RJ10)? I have a couple of these on order, as I need a module that can scale down to 10BaseT (yes Meg!) half duplex on the host switch and the MikroTik's do that as well as run all the way up to full 10G - they are the only 6-speed copper modules I seem to be able to find.
I wonder if the (cable link) length influences the temperature of the 10GBase-T SFP+ module - fs.com sell two varieties of SFP+ based 10GBase-T modules - an up to 30 metre version same as the MikroTik and a slightly more expensive version that will run 10G up to 80 metres.
In my setups, 10GBase-T copper here runs off native (also PoE+) enabled ports on a Netgear 4300 series switch - this is modular and fan cooled beast, so haven't really paid much attention to the module temps.
At the moment for copper based 10G, I've only our laptop Thunderbolt based docks which happily run 10GBase-T - although these are fan assisted!
The baby MikroTik's switches have either 1G SFP or 10G fibre SFP+ modules mostly