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Small black USB to RJ-45 desktop adapter

Belkin

Belkin F4U047bt USB 2.0 to RJ-45 10/100 converter

SKU CH-2JNH-5Q935 MPN F4U047bt

Adds a 10/100 Mbps Ethernet port to any PC via a single USB 2.0 connection

  • Compatible phone brandsUniversal
  • Product typeAdpater
  • Product colorBlack
  • Adds wired network access through a single USB port
  • 10/100 Mbps Ethernet speed for stable connectivity
  • Compact 0.6 × 0.9 × 2.6 inch design fits any setup
  • Lightweight 0.88 oz adapter travels easily
  • Plug-and-play on PC with no driver installation needed

Compact USB-to-Ethernet Adapter

The Belkin F4U047bt adds a single RJ-45 port to any PC through a USB 2.0 connection. It supports 10/100Base-TX twisted-pair networking for basic wired internet access. The desktop form factor measures 0.6 by 0.9 by 2.6 inches and weighs 0.88 oz. This adapter suits users who need a simple wired link on devices lacking a built-in Ethernet port.

Steady 100 Mbps Throughput

Under continuous load the link remains limited to 100 Mbps by the 10/100Base-TX specification and the USB 2.0 host interface. There is no higher-speed mode to fall back on, so sustained transfers will not exceed this ceiling. The adapter draws power directly from the USB bus without an external supply. Performance is consistent for typical browsing, email, and light file transfers.

Driver-Free Installation

The device uses a standard USB interface recognised by most PC operating systems without extra drivers. Simply plug the adapter into a free USB port and connect an Ethernet cable to the RJ-45 jack. The compact 2.6-inch depth fits alongside other ports without blocking adjacent sockets. Users requiring gigabit speeds or multi-port expansion will need a different solution.

How it compares

Measured against everything we stock in USB Adapter Cables & Dongles, at today’s prices. Recalculated every night.

Price $21.99
Pricier than about 75% of the 1,430 comparable items (median $14.99).

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Specifications

Product
Brand nameBELKIN
Model nameF4U047bt
Product typeAdpater
Product colorBlack
Size & build
Shipping weight0.05 kg
Package size135 × 107 × 30 mm
Compatibility
Compatible phone brandsUniversal

Questions about this item

Does the F4U047bt get warm or noisy when left plugged in all day?

The adapter has no moving parts and draws minimal power from the USB 2.0 port, so it runs silently and stays cool during continuous use.

What must my computer already have for this Belkin F4U047bt to work?

Your PC needs a free USB 2.0 Type-A port and an operating system that supports standard USB-Ethernet adapters; the single RJ-45 jack then connects to your network cable.

Will this 10/100 Mbps adapter slow down a Gigabit switch or older 10 Mbps hub I still use?

It negotiates at 10 or 100 Mbps, so it will not drag a faster switch down, and it is fully compatible with legacy 10Base-T equipment.

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