The MikroTik CRS305-1G-4S+IN is a small 10 Gbit switch for SFP+ connections, which is comparatively inexpensive. It offers seven cages for SFP+ modules (which of course can also accommodate the slower 1 Gbit variant, but also the fast RJ45 copper option).
Also included is a normal Gigabit port, which can be used to power the small switch via PoE from another switch. A fan is not built in, the switch cools passively via the aluminum case.
If you are using RJ45 modules, you should make sure that they are not placed side by side. These modules consume around two to three watts compared to the 0.7 of an optical module. And this energy goes into heat.
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