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Tenda SG108, eight-port unmanaged gigabit switch review

An eight-socket gigabit switch that says unmanaged in its own title and publishes its measurements, and gives no figure for what all eight sockets can carry together.

The bottom line Honest in its title and specific about its size, which together answer the two questions a small switch is usually bought on. The blank where a capacity figure should be is the line this page shares with most of its shelf.

On the listing

Eight RJ45 sockets at 10/100/1000 Mbit/s with full-duplex and half-duplex working, automatic negotiation, automatic MDI/MDIX and IEEE 802.3x flow control; a stated use as an extension to a router or modem for laptops, printers, cameras, access points and telephones; plug and play with no software and no configuration; two mounting holes on the rear for a wall or a desk; measurements of 124 by 59 by 23 millimetres; and a fanless build for quiet running.

Unmanaged, in the title

The word is there before the bullets start. It means there is no configuration page, no VLAN, no port mirroring and no aggregation, and it means the unit does exactly one thing. For most homes that is the right answer, and a page that says so in the title is faster to read than one that leaves it to be worked out.

No total for the whole unit

A switching capacity is the sum of all sockets running at full rate in both directions simultaneously. It is the only figure that describes the unit as a whole rather than one of its sockets, and it is not on this page. Two other listings on this shelf print it; this one does not.

Flow control

IEEE 802.3x, named. It is a small thing and a real one: the mechanism by which a busy socket asks a sender to wait instead of losing frames. Naming the standard rather than describing it as smart is what makes the claim checkable.

Before ordering

Measure the gap the unit has to sit in and compare it with the three figures on the page. That is the check this listing makes possible, and it is the one that most often goes wrong.

Availability

Priced at roughly 13 € on the German, French, Italian and Spanish Amazon stores the day this page was checked.

It is stocked on the British Amazon store as well, in that country’s own currency. The range above leaves those out: it counts euro stores and no others.

In the American Amazon catalogue with no live offer against it: the reference exists, nobody is filling it.

Every figure in this section is what Keepa held on the day this page was last updated. Stock and prices move without warning.

Prices quoted in this text were read on 10 September 2026. The live price is at the top of the page.

Where it holds up, and where it stops

Strengths

  • Uses the word unmanaged in the title, so the buyer who needs VLANs knows to look elsewhere without reading five bullets first
  • Names IEEE 802.3x flow control, which is the mechanism that keeps a fast sender from swamping a slow socket, and which most pages at this price omit
  • Publishes the three measurements in millimetres, which is what decides whether the unit fits behind a router or in a shallow cupboard

Compromises

  • No switching capacity is given, so nothing on the page says how the unit behaves with all eight sockets busy at once
  • The case material is absent even though the measurements are not, which is an odd pair of omissions
  • The power arrangement is unstated, so the contents of the box remain a question for the seller

Specifications

Port countEight — stated in the title and counted in the first bullet as eight RJ45 sockets at 10/100/1000 Mbit/s
Port speed10/100/1000 Mbit/s — stated in the first bullet, with full-duplex and half-duplex working, automatic negotiation, automatic MDI/MDIX and IEEE 802.3x flow control named alongside; no BASE-T designation is printed
Managed or unmanagedUnmanaged — stated in the title in that word, and supported by the third bullet, which says no software and no configuration is needed
Stated switching capacityNot published on the listing — no whole-unit total appears in the title or in the five bullets, and the largest rate given belongs to one socket
Fanless or fan-cooledFanless — stated in the fifth bullet as a fanless build, given as the reason the unit stays quiet wherever it is put
Case materialNot published on the listing — the fourth bullet gives the measurements, 124 × 59 × 23 mm, and two mounting holes on the rear, and never says what the shell around them is made of
Desktop or rack mountingDesk or wall — stated in the fourth bullet, using the two rear mounting holes; no rack ears and no rack unit height are named
Power supply typeNot published on the listing — no adapter, no internal supply and no box contents appear anywhere on the page
Amazon referenceB09M2YHXRV (same reference on 6 Amazon marketplaces)
EAN6932849436297

The questions that come up before an order

What is IEEE 802.3x flow control for?

It lets a socket that is falling behind ask the sender to pause for a moment rather than dropping what it cannot hold. On a mixed network, where a gigabit machine can talk to a slower one, it is the difference between a brief pause and lost frames that have to be sent again. This listing names it explicitly.

Why do the millimetres matter on a switch?

Because these units usually live in the space left over: behind a router, on a shelf under a television, inside a meter cupboard. A page that publishes 124 by 59 by 23 millimetres answers the fitting question before the order rather than after the delivery.