StarTech.com US2GA30 2.5GbE USB 3.0 Type-A to Ethernet Adapter - NBASE-T NIC - Multi-Speed Gigabit Network
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Product Features
Product Overview
The StarTech.com US2GA30 2.5GbE USB A to Ethernet Adapter bridges the gap between modern high-speed networking demands and existing infrastructure. This NBASE-T NIC delivers 2.5 Gb/s performance over standard Cat 5e cabling, eliminating the need for costly Cat 6A or fiber upgrades while maintaining backward compatibility with Gigabit LANs.
Designed for content creators, power users, and IT professionals, this adapter leverages USB 3.0 Type-A connectivity to provide reliable, high-bandwidth network access on laptops and workstations. Its portable form factor makes it ideal for mobile setups, remote work environments, and temporary network deployments where wired reliability outperforms wireless connections.
Relevant factors for this section include Host Interface, Total Number of Ports, Number of Network (RJ-45) Ports, Media Type Supported. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Technical Overview
Built around the Realtek RTL8156 controller, the US2GA30 supports multi-gigabit networking with three-speed auto-negotiation (2.5G/1G/100 Mbps). This ensures maximum bandwidth availability by automatically detecting and matching the connected network's capabilities. The adapter operates as a bus-powered device, drawing power directly from the USB port without requiring external power supplies.
Advanced networking features include support for 9K Jumbo Frames (though no longer supported in macOS), Wake-on-LAN (WoL), and VLAN tagging. These capabilities make it suitable for both consumer and professional environments where network management and efficiency are priorities.
Relevant factors for this section include Host Interface, Total Number of Ports, Number of Network (RJ-45) Ports, Media Type Supported. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Key Product Advantages
This adapter stands out by delivering 2.5 GbE performance without requiring infrastructure upgrades. By supporting existing Cat 5e cabling, it provides a cost-effective path to higher network speeds while maintaining compatibility with legacy Gigabit equipment.
Backward Compatibility
Seamlessly integrates with existing 10/100/1000 Mbps networks while providing headroom for 2.5 GbE when available.
- Works with standard Cat 5e cables
- Auto-negotiates to available speed
- No switch replacement required
Broad OS Support
Compatible with a wide range of operating systems and hypervisors for flexible deployment across different environments.
- Windows 7 through 10
- Windows Server 2008 R2 to 2016
- Linux LTS Kernel 4.19+
- macOS 10.11 to 11
Deployment / Use Cases
The US2GA30 adapter excels in scenarios where laptops or workstations require wired network connections exceeding standard Gigabit speeds. Content creators working with large video files, photographers transferring high-resolution images, and IT professionals managing network backups all benefit from the 2.5 GbE throughput.
This adapter is particularly valuable for modern ultrabooks and business laptops that often sacrifice built-in Ethernet ports for slim designs. Models like the Lenovo ThinkPad X1 Carbon, Dell XPS series, and HP EliteBook/ZBook can regain high-speed wired connectivity through this compact USB solution.
Mobile Workstation Enhancement
Transform any USB 3.0-equipped laptop into a high-performance networked workstation for data-intensive tasks.
Temporary Network Solutions
Ideal for conference rooms, temporary offices, or remote work setups where reliable wired connectivity is needed quickly.
What's in the Box
The package includes everything needed for immediate deployment of the 2.5GbE USB adapter.
Highlights
- 2.5 GbE performance over existing Cat 5e cabling
- USB 3.0 Type-A interface with 5 Gbps bandwidth
- Three-speed auto-negotiation (2.5G/1G/100 Mbps)
- NBASE-T and 2.5GBASE-T compliant
- Broad OS compatibility including Windows, Linux, and macOS
- Bus-powered design requires no external power
- Portable form factor for mobile use
- Backward compatible with Gigabit networks
- Supports Wake-on-LAN and VLAN tagging
- 2-year limited warranty
Specifications
| Specifications | |
|---|---|
| Manufacturer | StarTech.com |
| Manufacturer Part Number | US2GA30 |
| Brand Name | StarTech.com |
| Product Name | USB 3.0 Type-A To 2.5 Gigabit Ethernet Adapter - 2.5GBase-T |
| Packaged Quantity | 1 Each |
| Product Type | 2.5Gigabit Ethernet Adapter |
| Interfaces/Ports | |
| Host Interface | USB 3.0 Type A |
| Total Number of Ports | 1 |
| Number of Network (RJ-45) Ports | 1 |
| Media & Performance | |
| Media Type Supported | Twisted Pair |
| Network & Communication | |
| Network Technology | 10Base-T,1000Base-T,100Base-TX,2.5GBase-T |
| Physical Characteristics | |
| Form Factor | Portable |
| Miscellaneous | |
| Package Contents | USB 3.0 Type-A To 2.5 Gigabit Ethernet Adapter - 2.5GBase-T 1 x Quick-Start Guide |
| Device Supported | Notebook,Computer |
| Environmentally Friendly | Yes |
| Environmental Certification | EU RoHS |
| Environmental Compliance | Restriction of Hazardous Substances (RoHS) 2,Registration, Evaluation, Authorization and Restriction of Chemicals (REACH),Waste Electrical and Electronic Equipment Directive (WEEE) |
| Country of Origin | China |
| Warranty | |
| Limited Warranty | 2 Year |
User Manual
FAQ
What is the maximum network speed this adapter supports?
The StarTech.com US2GA30 supports up to 2.5 Gb/s (2.5 Gigabit per second) network speeds. It uses three-speed auto-negotiation to automatically connect at 2.5G, 1G, or 100 Mbps depending on what the connected network equipment supports, ensuring optimal performance without manual configuration.
Does this adapter work with my existing network cables?
Yes, this adapter works with standard Cat 5e Ethernet cables to deliver 2.5 GbE performance. One of its key advantages is that it doesn't require expensive Cat 6A or fiber optic cabling upgrades. The NBASE-T technology enables higher speeds over the twisted pair cabling already installed in most environments.
Which operating systems are compatible with this USB Ethernet adapter?
The adapter supports Windows 7, 8.1, and 10; Windows Server 2008 R2, 2012 R2, and 2016; Linux distributions with LTS Kernel 4.19 or newer; and macOS versions 10.11 through 11. This broad compatibility makes it suitable for diverse computing environments from home offices to enterprise deployments.
Can I use this adapter with my laptop that only has USB ports?
Absolutely. This adapter is specifically designed for laptops and computers with USB 3.0 Type-A ports. It's bus-powered, meaning it draws power directly from the USB port without needing an external power adapter. The portable form factor makes it ideal for mobile professionals who need reliable wired networking on the go.
What is NBASE-T technology and why is it important?
NBASE-T is an Ethernet standard that enables multi-gigabit speeds (2.5G and 5G) over existing Cat 5e and Cat 6 cabling. This technology is important because it provides a cost-effective upgrade path from standard Gigabit Ethernet without requiring complete cable infrastructure replacement. The US2GA30 implements NBASE-T to deliver 2.5 GbE performance.
Does this adapter support advanced networking features?
Yes, the adapter supports several advanced networking features including Wake-on-LAN (WoL) for remote power management, VLAN tagging for network segmentation, and 9K Jumbo Frames for improved data transfer efficiency (though Jumbo Frame support is no longer available in macOS). These features make it suitable for both basic connectivity and managed network environments.
| Qty | Price | Available |
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