StarTech.com C22G-USB-ETHERNET 2.5GbE USB-C to Ethernet Adapter - NBASE-T NIC - USB 3.2 Gen 1 - Thunderbolt Compatible
Business volume discounts
Technical guidance
Preparation & staging
QC · ON · AB · BC
Product Features
Technical Overview
This adapter is built around the Realtek RTL8156BG chipset, which supports the 2.5GBASE-T standard and NBASE-T multi-gigabit technology. It offers four-speed auto-negotiation, automatically connecting at 10Mbps, 100Mbps, 1Gbps, or 2.5Gbps to ensure optimal compatibility with existing network switches and routers. The USB 3.2 Gen 1 (5Gbps) host interface provides ample bandwidth to handle the adapter's maximum 2.5Gbit/s data rate.
Advanced networking features include support for PXE (Preboot Execution Environment) for network booting, VLAN tagging for network segmentation, and Wake-on-LAN (WoL) for remote power management. The adapter also supports Jumbo Frames up to 16K to improve throughput efficiency for large data transfers, though this feature is not available in macOS.
Relevant factors for this section include Chipset Manufacturer, Chipset Model, Features, Host Interface. 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
The primary advantage of this adapter is its ability to deliver 2.5GbE performance using the existing Cat5e cabling found in most offices and homes. This provides a significant performance uplift over standard Gigabit Ethernet for tasks like large file transfers, video editing from network storage, or high-quality video conferencing, all without the cost and disruption of rewiring with Cat6A or fiber.
Broad System Compatibility
The adapter features driverless installation on most modern operating systems, including Windows 7 and later, Linux LTS Kernel 4.19+, macOS, iOS, and ChromeOS. It works across all major hardware platforms, including Intel, AMD, ARM (Snapdragon), and Apple Silicon systems.
- Works with MacBooks, Chromebooks, and Windows laptops
- Compatible with tablets and desktop computers
Enhanced Connectivity Security
Provides a faster and more reliable wired connection compared to Wi-Fi, which is crucial for sensitive business data, cloud synchronization, and stable video calls. The direct Ethernet connection reduces latency and avoids wireless interference.
Deployment / Use Cases
This adapter is perfectly suited for modernizing the connectivity of devices that lack a built-in Ethernet port or are limited to slower wireless speeds. Its slim profile makes it an excellent fit for hot-desking environments, home offices, or as a permanent fixture on a compact desktop setup.
Common deployment scenarios include connecting ultrabooks and tablets to corporate networks for secure, high-speed access, retrofitting older desktop systems with a modern USB-C interface for faster network performance, and providing a stable Ethernet connection for gaming consoles or media devices that benefit from low latency.
Office & Remote Work
Enables employees with modern, port-limited laptops to connect reliably to office networks for accessing large files, using VoIP systems, and participating in high-definition video conferences without Wi-Fi dropouts.
Content Creation & Data Transfer
Ideal for photographers, videographers, and IT professionals who need to quickly move large project files to and from NAS devices or servers, significantly reducing transfer wait times compared to standard Gigabit connections.
Physical Profile
The adapter features a compact, standalone desktop form factor with a minimal footprint. Its small dimensions (0.80" wide x 0.60" high) and lightweight design (0.60 oz) make it highly portable. The integrated 6-inch USB-C cable provides flexibility in placement while keeping the setup tidy. The Space Gray aluminum housing offers durability and a premium aesthetic that matches contemporary computing hardware.
- Width
- 0.80" (20.32 mm)
- Height
- 0.60" (15.24 mm)
- Weight
- 0.60 oz (17.01 g)
Highlights
- Adds 2.5GbE network access via a USB Type-C port on laptops, tablets, and desktops.
- Delivers 2.5Gbps speeds over existing Cat5e cabling using NBASE-T technology.
- Features broad, driverless compatibility with Windows, Linux, macOS, iOS, and ChromeOS.
- Compact desktop form factor with a 6-inch attached USB-C cable for easy connection.
- Supports advanced features like PXE boot, VLAN, Wake-on-LAN, and Jumbo Frames.
- USB bus-powered design requires no external power adapter.
- Compatible with Thunderbolt ports and works on Intel, AMD, ARM, and Apple Silicon platforms.
- Backed by a 2-year limited warranty and complies with RoHS and WEEE environmental directives.
Specifications
| Specifications | |
|---|---|
| Manufacturer | StarTech.com |
| Manufacturer Part Number | C22G-USB-ETHERNET |
| Brand Name | StarTech.com |
| Product Name | 2.5Gigabit Ethernet Adapter |
| Packaged Quantity | 1 |
| Product Type | 2.5Gigabit Ethernet Adapter |
| Technical Information | |
| Chipset Manufacturer | Realtek |
| Chipset Model | RTL8156BG |
| Features | PXE Support,Jumbo Frames Support |
| Interfaces/Ports | |
| Host Interface | USB 3.2 (Gen 1) Type C |
| Total Number of Ports | 1 |
| Number of Network (RJ-45) Ports | 1 |
| Media & Performance | |
| Media Type Supported | Twisted Pair |
| Maximum Data Transfer Rate | 2.50 Gbit/s |
| Network & Communication | |
| Network Technology | 2.5GBase-T |
| Physical Characteristics | |
| Color Family | Gray |
| Product Color | Space Gray |
| Form Factor | Desktop |
| Height | 0.60" (15.24 mm) |
| Width | 0.80" (20.32 mm) |
| Weight (Approximate) | 0.60 oz (17.01 g) |
| Miscellaneous | |
| Device Supported | Tablet,Notebook,Desktop Computer |
| Environmental Compliance | Restriction of Hazardous Substances (RoHS),Waste Electrical and Electronic Equipment Directive (WEEE) |
| Warranty | |
| Limited Warranty | 2 Year |
User Manual
FAQ
What is the maximum network speed this USB-C adapter supports?
The StarTech.com C22G-USB-ETHERNET adapter supports a maximum data transfer rate of 2.5 Gbit/s (2.5Gbps). It uses 2.5GBASE-T and NBASE-T technology to achieve this speed over standard twisted-pair Ethernet cabling, specifically Cat5e or better. It also auto-negotiates down to 1Gbps, 100Mbps, or 10Mbps for compatibility with older network equipment.
Which operating systems are compatible with this Ethernet adapter?
This adapter offers broad driverless compatibility. It auto-installs on Windows 7 and later versions, Linux distributions with LTS Kernel 4.19 or newer, macOS, iOS, and ChromeOS. This makes it suitable for a wide range of devices including MacBooks, Windows laptops, Chromebooks, iPads, and desktop computers without requiring manual driver downloads in most cases.
Can I use this adapter with my existing Cat5e network cables?
Yes, a key advantage of this adapter is its ability to deliver the full 2.5Gbps speed over existing Category 5e (Cat5e) cabling. It leverages NBASE-T technology, which is designed to provide multi-gigabit speeds over legacy cable plants, allowing you to upgrade network performance without the expense of rewiring your infrastructure with Cat6A or fiber optic cables.
Does this adapter require an external power source?
No, this adapter is USB bus-powered. It draws all necessary power directly from the host device's USB Type-C port, eliminating the need for a separate power adapter or cable. This contributes to its compact and portable design, making it ideal for use with laptops and mobile devices.
What are the physical dimensions and form factor of the adapter?
The adapter has a compact desktop form factor, measuring 0.80 inches in width and 0.60 inches in height. It weighs approximately 0.60 ounces (17 grams). It includes a 6-inch (15 cm) attached USB-C cable for connection. Its small size and Space Gray color make it discreet and suitable for any workspace.
What advanced networking features does this adapter support?
Beyond basic connectivity, this Realtek RTL8156BG-based adapter supports several advanced features. These include PXE for network booting, VLAN tagging for managing network traffic, and Wake-on-LAN for remotely powering on a connected computer. It also supports Jumbo Frames up to 16K to improve data transfer efficiency, although note that Jumbo Frame support is not available in macOS.
| Qty | Price | Available |
|---|
