D-Link DUB-E250 USB-C to 2.5 Gigabit Ethernet Adapter with USB 3.0
The D-Link DUB-E250 is a compact and powerful USB-C to 2.5 Gigabit Ethernet adapter that instantly upgrades your laptop, MacBook, or PC to ultra-fast wired network speeds up to 2500 Mbps. Perfect for modern ultra-thin laptops without built-in Ethernet ports, this adapter delivers 2.5x faster speeds than standard Gigabit connections, making it ideal for demanding workloads like online gaming, 4K streaming, video conferencing, large file transfers, and network-attached storage. With its plug-and-play design, compatibility with both Windows and macOS, and ultra-portable form factor, the DUB-E250 is the perfect solution for professionals, gamers, and content creators who need reliable, high-speed wired connectivity on the go.
Key Features
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2.5 Gigabit Ethernet Speed: Upgrade to 2500 Mbps wired performance, 2.5x faster than standard Gigabit Ethernet for lightning-fast downloads, streaming, and file transfers
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USB-C Connectivity: Compatible with USB-C and Thunderbolt 3 ports on laptops, MacBooks, PCs, and more
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Full-Duplex Performance: Supports bi-directional data transmission with up to 4.6 Gbps of combined throughput
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Plug and Play: Built-in virtual CD driver for Windows makes installation effortless with no CDs or downloads required
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Ultra-Compact Design: One of the smallest 2.5Gb adapters in the world at just 5.3cm × 2.15cm × 1.5cm, easily slips into your pocket or laptop bag
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Wide Compatibility: Works with Windows 7/8/10 and macOS 10.6 or later, fully backwards compatible with 10/100/1000 Mbps networks
Lightning-Fast Multi-Gigabit Performance
Experience the power of 2.5 Gigabit Ethernet connectivity with the DUB-E250. Simply plug the adapter into any available USB-C port on your computer and you're ready to connect to your router or switch at speeds more than twice as fast as traditional Gigabit Ethernet. Whether you're transferring large video files to a NAS, hosting live streams in high-definition, or engaging in competitive online gaming, the DUB-E250 delivers exceptional speeds and rock-solid stability. The adapter supports full-duplex mode for simultaneous sending and receiving of data, providing up to 4.6 Gbps of combined bandwidth.
Perfect for Modern Laptops and Workstations
Designed specifically for ultra-thin laptops with USB-C or Thunderbolt 3 connections and no built-in Ethernet port, the DUB-E250 brings reliable wired networking to devices like MacBook Pro, MacBook Air, Dell XPS, Microsoft Surface, and countless other modern notebooks. The adapter is also ideal for desktop users who want to add multi-gigabit connectivity without installing a PCIe network card. With its compact, portable design, you can take fast, reliable wired networking with you wherever you go.
Effortless Installation and Use
The DUB-E250 features a virtual CD driver preloaded on the adapter for Windows users, eliminating the need for optical drives or manual driver downloads. Simply plug in the adapter, and the installation software launches automatically. For macOS users, drivers are available from the D-Link support website. The adapter also features auto speed detection and crossover detection, automatically negotiating 10/100/1000/2500 speeds and eliminating cable confusion. Two LED indicators provide visual diagnostics: a solid orange connection LED when the device is operational, and a flashing white data access LED during transfers.
Energy-Efficient Green Technology
The DUB-E250 is powered directly from the USB-C port with no external power adapter required, reducing cable clutter. It supports the USB 3.0 standard's power-saving features and includes an energy-saving suspend and resume function that minimises power consumption during times of light network traffic, when the device is idle, or when the Ethernet cable is unplugged. This green technology is good for the environment and even better for your laptop's battery life, making it perfect for mobile professionals.
Backwards Compatible with Existing Networks
While the DUB-E250 excels at 2.5 Gigabit speeds, it's fully backwards compatible with existing Fast Ethernet (100 Mbps) and Gigabit (1000 Mbps) networks, allowing you to connect to a wired network wherever you are. The adapter automatically detects and adjusts to the available network speed, ensuring seamless connectivity whether you're at home, in the office, or on the road. It complies with IEEE 802.3, 802.3u, 802.3ab, 802.3az, and 802.3bz standards.
Ideal Use Cases
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Gaming: Eliminate lag and enjoy stable, low-latency connections for competitive online gaming
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Content Creation: Transfer large 4K video files and high-resolution images to network storage at blazing speeds
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Live Streaming: Host high-definition streams with zero interruptions and maximum upload bandwidth
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Video Conferencing: Ensure crystal-clear video calls without dropouts or quality degradation
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NAS Access: Maximise performance when accessing network-attached storage for backups and media libraries
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Remote Work: Maintain fast, secure VPN connections for professional remote working
What's in the Box
- D-Link DUB-E250 USB-C to 2.5G Ethernet Adapter
- Quick Installation Guide
Full Specifications
| Model |
DUB-E250 |
| Product Type |
Network Adapter |
| Form Factor |
External |
| Interface |
USB-C / Thunderbolt 3 |
| Ports |
1 × 2.5GBase-T RJ45 Ethernet |
| Maximum Speed |
2500 Mbps (2.5 Gigabit) |
| Data Link Protocol |
10Mb LAN, 100Mb LAN, Gigabit Ethernet, 2.5 Gigabit Ethernet |
| Duplex Mode |
Full-duplex (up to 4.6 Gbps combined throughput) |
| Cabling Type |
10Base-T, 100Base-TX, 1000Base-T, 2.5GBase-T |
| LED Indicators |
2 LEDs (Connection: solid orange; Data Access: flashing white) |
| Auto-Negotiation |
10/100/1000/2500 Mbps |
| Crossover Detection |
Yes |
| Power |
USB bus-powered (no external adapter required) |
| Energy Efficiency |
IEEE 802.3az (Energy Efficient Ethernet), suspend and resume function |
| Compliant Standards |
IEEE 802.3, IEEE 802.3u, IEEE 802.1Q, IEEE 802.3ab, IEEE 802.1p, IEEE 802.3x, USB 2.0, USB 3.0, IEEE 802.3az, IEEE 802.3bz, USB 3.1 Gen 1 |
| Operating System |
Windows 7/8/10, macOS 10.6 or later |
| Dimensions (W × D × H) |
5.3cm × 2.15cm × 1.5cm (2.1" × 0.8" × 0.6") |
| Weight |
28.5g |
| Warranty |
2 years |
Specifications are sourced from the manufacturer product page and may be updated.
