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Compact USB-A and USB-C dongle with RJ45 port, matte black finish

C&N

C&N UC57 5Gbps USB 3.2 Ethernet Adapter RTL8157 2-in-1 USB-A/C RJ45

SKU CH-GGMX-0X0T2

A 5Gbps USB 3.2 to RJ45 network adapter with dual USB-A and USB-C connectors, using the Realtek RTL8157 chipset for 2.5Gbps and 1Gbps fallback speeds

  • Connector typeRJ45
  • Up to 5 Gbps wired speed via USB 3.2 Gen 2
  • 2-in-1 USB-A and USB-C connectors for broad device compatibility
  • Backward compatible with 2.5 Gbps, 1 Gbps, 100 Mbps and 10 Mbps networks
  • Realtek RTL8157 chipset with IEEE 802.3bz and 802.3ab compliance
  • Driver installation required for optimal 5 Gbps performance

5Gbps USB 3.2 Ethernet Adapter

The C&N UC57 adds a 5Gbps RJ45 port to any PC or laptop through a USB 3.2 connection. It uses the Realtek RTL8157 controller and supports 5000, 2500, 1000, 100 and 10 Mbps link speeds. The adapter works with Windows, Mac OS and Linux once the required driver is installed.

Dual USB-A and USB-C Connector

A single cable ends in both a USB-A and a USB-C plug so you can switch between legacy and modern ports without carrying a separate dongle. The device complies with USB 3.2 Gen2 and IEEE 802.3bz standards and falls back to USB 2.0 or 3.0 at reduced throughput. Advanced power management reduces energy draw during idle periods.

Replaces Gigabit USB Dongles

This unit upgrades a 1000 Mbps USB adapter when your broadband exceeds 1 Gbps and your router or switch offers 2.5G or 5G ports. The jump is worth it only if you connect with a CAT6A or better cable to a USB 3.2 Gen2 host port. Buyers whose network infrastructure stops at 1 Gbps will not see a speed benefit.

How it compares

Measured against everything we stock in Network Adapters & RJ45 Plugs, at today’s prices. Recalculated every night.

Price $27.99
Pricier than about 67% of the 1,221 comparable items (median $19.99).

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Specifications

Product
Brand nameC&N
Model nameUC57
Ports & slots
Connector typeRJ45

Questions about this item

Does USB 3.2 Gen2 actually deliver 5000 Mbps on the UC57?

Yes, the RTL8157 chipset supports 5000 Mbps over USB 3.2 Gen2; connect to a USB 3.2 or higher port and use CAT6A cable to reach that rate.

What ports and cable does the 2-in-1 UC57 need to work?

It plugs into either USB-A or USB-C and requires a CAT6A or higher RJ45 Ethernet cable for 5 Gbps operation.

Which driver step do people skip when installing the UC57?

Downloading and installing the Realtek RTL8157 driver before first use; without it the adapter falls back to slower speeds.

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