Lenovo 4X90S91830 ThinkPad USB 3.0 to Gigabit Ethernet Adapter - 1 Port RJ-45 - 10/100/1000Base-T - Desktop
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Product Features
Product Overview
The Lenovo ThinkPad USB 3.0 to Ethernet Adapter (Part 4X90S91830) is a dedicated Gigabit Ethernet card that provides a reliable wired network connection through a USB 3.0 interface. Designed for Lenovo's professional-grade ThinkPad ecosystem, this adapter delivers a stable, high-speed networking alternative or replacement for devices lacking built-in Ethernet ports.
This compact desktop form factor adapter is engineered to maintain the performance and reliability standards associated with ThinkPad hardware. It enables seamless integration into existing wired networks, supporting standard twisted pair cabling for straightforward deployment in office, home office, or remote work environments where consistent network performance is critical.
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
This adapter leverages the USB 3.0 host interface to deliver full Gigabit Ethernet performance, supporting the 10/100/1000Base-T network standard for data transfer rates up to 1000 Mbps. The single RJ-45 port connects directly to standard network infrastructure using cost-effective twisted pair cabling, with support for cable runs up to 100 meters.
The device operates as a plug-and-play peripheral, typically requiring minimal driver installation on modern operating systems. Its technical design focuses on providing a direct, unfiltered bridge between the USB bus and the Ethernet network, ensuring low latency and reliable packet transmission for business applications, large file transfers, and stable video conferencing 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.
Key Product Advantages
The Lenovo ThinkPad USB 3.0 to Ethernet Adapter offers a purpose-built solution for adding wired network connectivity to ultraportable and modern computing devices. Its advantages center on reliability, performance, and seamless integration with professional workflows.
Guaranteed Network Interface
Provides a dependable replacement or supplemental Ethernet port for client devices, servers, or workstations, ensuring network availability when built-in adapters fail or are absent.
- Direct hardware replacement
- Maintains network uptime
- Enterprise-grade reliability
Super-Fast Data Transfer
Utilizes USB 3.0 connectivity to maximize data throughput between the network and computer, reducing bottlenecks for large file transfers, backups, and data-intensive applications.
- Leverages USB 3.0 bandwidth
- Minimizes transfer latency
- Supports high-demand tasks
Simplified Network Expansion
Easily adds any compatible computer to a wired home or office network with a single-port design that simplifies setup and reduces cable clutter on the desktop.
- Single-port simplicity
- Quick deployment
- Reduces desktop footprint
Deployment / Use Cases
This adapter is ideal for environments where reliable wired connectivity is preferred or required over wireless networks. Its primary use case is providing a stable Gigabit Ethernet connection to devices that lack built-in RJ-45 ports, such as modern ultrabooks, tablets, or compact desktops.
Common deployment scenarios include corporate offices where IT departments standardize on wired connections for security and performance, home offices requiring consistent connectivity for video conferencing and large uploads, and temporary workstations in conference rooms or training facilities. The adapter also serves as a direct hardware replacement for failed onboard Ethernet controllers in laptops or desktops, restoring network functionality without requiring major hardware repairs.
Business & Office Integration
Deploy on employee laptops or docking stations to ensure reliable, high-speed access to corporate networks, servers, and cloud applications, enhancing productivity and security.
Remote & Hybrid Work Support
Provide a stable wired internet connection for remote workers using lightweight laptops, improving call quality and reducing dropouts during critical virtual meetings and collaborative sessions.
Highlights
- Adds a Gigabit Ethernet port via USB 3.0 for devices lacking built-in RJ-45
- Supports 10/100/1000Base-T networking for speeds up to 1000 Mbps
- Uses standard twisted pair cabling with support for runs up to 100 meters
- Compact desktop form factor minimizes space usage on desks or worksurfaces
- Plug-and-play operation simplifies installation on modern operating systems
- Compatible with notebooks, computers, and tablets for broad device support
- Provides a reliable wired network alternative to wireless connections
- Engineered as a hardware replacement for failed onboard Ethernet controllers
Specifications
| Specifications | |
|---|---|
| Manufacturer | Lenovo Group Limited |
| Manufacturer Part Number | 4X90S91830 |
| Brand Name | Lenovo |
| Product Name | ThinkPad USB3.0 to Ethernet Adapter |
| Product Type | Gigabit Ethernet Card |
| Interfaces/Ports | |
| Host Interface | USB 3.0 |
| Total Number of Ports | 1 |
| Number of Network (RJ-45) Ports | 1 |
| Media & Performance | |
| Media Type Supported | Twisted Pair |
| Network & Communication | |
| Network Technology | 10/100/1000Base-T |
| Physical Characteristics | |
| Form Factor | Desktop |
| Miscellaneous | |
| Device Supported | Notebook,Computer,Tablet |
| Country of Origin | China |
FAQ
What devices are compatible with this USB to Ethernet adapter?
The Lenovo ThinkPad USB 3.0 to Ethernet Adapter is compatible with notebooks, computers, and tablets that have an available USB 3.0 port and run operating systems with support for standard USB networking drivers. This includes most Windows, macOS, and Linux systems. It is designed as a universal Gigabit Ethernet solution for devices that lack a built-in RJ-45 port or require an additional wired connection.
What is the maximum network speed this adapter supports?
This adapter supports Gigabit Ethernet speeds up to 1000 Mbps (1 Gbps) using the 10/100/1000Base-T network standard. The actual throughput may vary based on the host device's USB 3.0 controller performance, network infrastructure quality, and cable category. It is backward compatible with 100 Mbps Fast Ethernet and 10 Mbps Ethernet networks for seamless integration into existing network environments.
Does this adapter require external power or drivers?
The adapter is bus-powered through the USB 3.0 connection, drawing power directly from the host device without needing an external power adapter. Driver requirements depend on the operating system; most modern OS versions include built-in support for USB Ethernet adapters, allowing plug-and-play functionality. For certain systems or specific configurations, downloadable drivers from Lenovo's support site may be recommended for optimal performance.
What type of network cable does this adapter use?
The adapter uses standard twisted pair Ethernet cables with RJ-45 connectors, specifically supporting Category 5e, 6, or higher cables for optimal Gigabit performance. It is designed for cost-efficient twisted pair cabling, which is widely available and supports reliable data transfer over distances up to 100 meters per Ethernet standard specifications.
Can this adapter be used as a replacement for a failed built-in Ethernet port?
Yes, this Gigabit Ethernet card is designed to guarantee a replacement networking interface for client devices, servers, or workstations. It provides a fully functional wired network connection through USB 3.0, effectively restoring network capability when a built-in Ethernet port fails or is damaged. This makes it a practical hardware solution for maintaining productivity without requiring immediate motherboard repairs or device replacement.
Is this adapter suitable for video conferencing and large file transfers?
Absolutely. The adapter's Gigabit Ethernet capability and USB 3.0 interface provide the stable, high-bandwidth connection required for smooth video conferencing, VoIP calls, and rapid transfer of large files. By using a wired connection, it reduces latency, packet loss, and interference common in wireless environments, ensuring consistent performance for business communications, data backups, and collaborative work involving substantial datasets.
| Qty | Price | Available |
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