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Small black USB-A dongle with RJ45 port and status LEDs

Cable Matters 202485 USB-A 2.5Gbps network connector

SKU CH-2AB6-125VX MPN 202485

Adds a 2.5 Gbps wired Ethernet port to any USB-A device, using a Realtek RTL8156BG controller for plug-and-play compatibility with Windows, macOS, Linux and ChromeOS

  • 5 Gbps wired speed for faster transfers and lower latency
  • Realtek RTL8156BG controller delivers stable 2.5 Gigabit performance
  • Works plug-and-play on Windows, macOS, Linux and ChromeOS
  • USB-A 3.0 host connection adds Ethernet to laptops without a port
  • Backward compatible with 10, 100 and 1000 Mbps networks

USB-A 2.5Gbps network adapter

The Cable Matters 202485 adds a 2.5 Gigabit Ethernet port to any device with a USB-A 3.0 socket. It suits laptops, desktops and mini PCs that lack built-in wired networking or need speeds beyond standard Gigabit. The Realtek RTL8156BG controller handles the link, and the adapter works with Windows, macOS, Linux and ChromeOS. It is not compatible with Nintendo Switch, Wii or TV devices.

Thermals, noise and power

The Realtek RTL8156BG controller runs with efficient power consumption and reduced heat during normal operation. No fan is present, so the adapter is completely silent. Power is drawn directly from the host USB-A port, requiring no external supply. Actual throughput depends on the host USB port, cabling, router or switch capability and ISP speed.

Driver and cable impact

Plug-and-play operation is supported on many systems, but installing the latest Realtek USB 2.5G Ethernet Controller driver improves stability and speed, especially on older operating systems or certain Linux kernels. Using a shielded Cat 6A cable helps maintain the 2500Mbps link quality. The adapter is backward compatible with 10, 100 and 1000 Mbps networks.

Highlights

  • 5 Gbps wired speed for faster transfers and lower latency
  • Realtek RTL8156BG controller delivers stable 2.5 Gigabit performance
  • Works plug-and-play on Windows, macOS, Linux and ChromeOS
  • USB-A 3.0 host connection adds Ethernet to laptops without a port
  • Backward compatible with 10, 100 and 1000 Mbps networks

Specifications

BrandCable Matters
Model202485

Questions about this item

How do I install the Cable Matters 202485 USB-A 2.5Gbps network connector, and what step is often missed?

Plug the adapter into a USB 3.0 Type-A port and connect an Ethernet cable. The step often missed is installing the latest Realtek USB 2.5G Ethernet Controller driver for best speed and stability, especially on older operating systems or certain Linux kernels.

What maintenance or replacement will the Cable Matters 202485 USB-A 2.5Gbps network connector need later?

No scheduled maintenance is required. Keep the RJ45 port and USB connector free of dust. Replace the unit if the controller fails or if the USB-A plug or RJ45 jack becomes physically damaged.

What limit appears first on the Cable Matters 202485 USB-A 2.5Gbps network connector during sustained use?

The practical throughput ceiling is the USB 3.0 host interface and the Realtek RTL8156BG controller, which together cap sustained speeds at up to 2500 Mbps, provided the host port, cable, router or switch, and ISP plan all support that rate.

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