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Compact black USB-A adapter with aluminum housing and integrated cable

SABRENT NT-UA25 USB 3.0 to 2.5GbE Network Adapter

SKU CH-AET5-EBS7K

Adds a 2.5 Gigabit Ethernet port via USB 3.0 Type-A for speeds up to 2.5× faster than Gigabit with backward compatibility to 10/100/1000 Mbps

  • ColorBlack
  • Weight1.4 ounces
  • Add 2.5GbE over USB 3.0 for up to 2.5× faster wired speed
  • RTL8156BG chipset gives low-latency, low-CPU performance during sustained transfers
  • Driver-free on Windows, macOS and Linux with integrated USB-A cable
  • 5GBASE-T compliant for 2.5Gbps over 100 m of CAT5e or better
  • Aluminum housing acts as heatsink for cool, stable bus-powered operation

USB-A 3.0 to 2.5GbE adapter

This SABRENT NT-UA25 adapter adds a 2.5 Gigabit Ethernet port to any USB-A 3.0 port. It targets desktops, laptops, servers or NAS units that lack a multi-gig port or need a stable wired link instead of Wi-Fi. The integrated cable and bus-powered design keep the setup compact for travel or permanent use. Compatible with Windows, macOS, Linux and Chrome OS without extra drivers in most cases.

Sustained transfer behaviour

The Realtek RTL8156BG controller is chosen for low-latency and low-CPU operation that remains stable during prolonged transfers. An aluminum housing acts as a heatsink to maintain cool performance under continuous load. The adapter auto-negotiates between 2.5G, 1G and 100M speeds depending on the connected switch or router. Status LEDs give immediate feedback on link and activity during long sessions.

2.5GBASE-T practical limits

Full 2.5Gbps throughput requires a 2.5G-capable router or switch and CAT5e or better cabling. The 802.3bz standard supports this speed over 100 metres of such cable. The adapter falls back to 1GbE or 100Mbps on older networks and functions on USB 2.0 ports at reduced bandwidth. Wake-on-LAN and PXE boot are supported for managed environments.

Highlights

  • Add 2.5GbE over USB 3.0 for up to 2.5× faster wired speed
  • RTL8156BG chipset gives low-latency, low-CPU performance during sustained transfers
  • Driver-free on Windows, macOS and Linux with integrated USB-A cable
  • 5GBASE-T compliant for 2.5Gbps over 100 m of CAT5e or better
  • Aluminum housing acts as heatsink for cool, stable bus-powered operation

Specifications

BrandSABRENT
ModelNT-UA25
ColorBlack
Weight1.4 ounces

Questions about this item

Does the aluminum housing keep the RTL8156BG chipset cool during all-day 2.5Gbps transfers?

The rugged aluminum housing doubles as a heatsink for cool, stable performance during prolonged transfers and mobile use.

What type of USB port must my computer have for this adapter to work?

It plugs into any USB 3.0 Type-A port and is backward compatible with USB 2.0 ports.

Will this adapter negotiate down to 1GbE if my switch only supports 1000Mbps?

It auto-negotiates to 2.5G / 1G / 100M and is backward compatible with 1GbE and 100Mbps networks.

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