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Belkin USB 3.0 to Gigabit Ethernet adapter, compact external dongle, matte black finish

Belkin

Belkin B2B048 USB 3.0 Gigabit Ethernet network card

SKU CH-SXDC-34XFB MPN B2B048

Adds wired Gigabit Ethernet to any device with a USB 3.0 port, no driver installation or external power required

  • Rated speed10/100/1000 Mbit/s
  • Interface typeUSB
  • Connection types1 x USB 3.0
  • Key featuresDevice Type: Network adapter Form Factor: External Plug & pl
  • Product weight20
  • Ready to use with no driver installation required
  • Powered directly from the USB port so no extra adapter is needed
  • Gigabit speeds up to 1000 Mbps over USB 3.0
  • Compact external design weighs only 20 grams
  • Works with 10, 100 and 1000 Mbps Ethernet networks

What it is and who it is for

The Belkin B2B048 is an external USB 3.0 to Gigabit Ethernet adapter. It adds a wired network port to laptops, tablets or desktops that lack one or need a replacement. The device draws power from the USB bus so no external supply is required. It is suited for users who want a simple plug-and-play network connection without installing drivers.

Deciding specification: USB 3.0 interface

The adapter connects through a single USB 3.0 port and negotiates 10, 100 or 1000 Mbps Ethernet speeds. Compatibility depends on the host having a USB 3.0 Type-A socket; USB 2.0 ports will limit throughput to lower rates. No software installation is needed on supported operating systems, making the interface choice the primary factor for reliable gigabit performance.

Capacity and headroom

The link supports 10Base-T, 100Base-TX and 1000Base-T cabling at a maximum data transfer rate of 1 Gbps. Typical wired workloads such as file transfers, video streaming and remote desktop sessions run comfortably within this bandwidth. Congestion appears only when sustained traffic approaches the gigabit ceiling or when the host USB controller shares bandwidth with other high-speed peripherals.

How it compares

Measured against everything we stock in Ethernet Cards & NICs, at today’s prices. Recalculated every night.

Price $26.99
Cheaper than about 87% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameBELKIN
Model nameB2B048
Performance
Rated speed10/100/1000 Mbit/s
Ports & slots
Interface typeUSB
Connection types1 x USB 3.0
Size & build
Shipping weight0.14 kg
Package size150 × 132 × 30 mm

Questions about this item

What does the 1000 Mbps rating mean once the adapter is plugged into a USB 3.0 port?

The adapter can negotiate gigabit Ethernet speeds on a USB 3.0 connection, delivering up to 1 Gbps data transfer when the network and cabling support it.

Which USB standard does the B2B048 use and what throughput does it cap at?

It uses USB 3.0, which provides enough bandwidth for the adapter to reach its full 1 Gbps Ethernet rate.

What physical space or mounting does the external adapter need?

The unit weighs 20 g and plugs directly into a USB 3.0 port with no external power supply or mounting hardware required.

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