This article covers StarTech.com USB有線LANアダプター.
Overview
The StarTech.com 2GPD3-USB-C-ETHERNET is a USB-C to 2.5Gbps Ethernet adapter with integrated Power Delivery pass-through. It enables simultaneous wired networking and up to 100W laptop charging through a single USB-C port, eliminating the need for a separate hub or dock. Compatible with Thunderbolt 3 and 4, it works with MacBooks, Windows laptops, Chromebooks, and even iOS devices. The adapter is exceptionally compact at 8.5 x 2.2 x 1.5 cm with an attached 15cm cable, making it portable for travel or hot-desking. Featuring a Realtek chipset, it supports plug-and-play operation with automatic driver installation on most operating systems.
Connectivity & Compatibility
This adapter connects via USB-C 3.2 Gen 1 (5Gbps) and provides an RJ45 port supporting auto-negotiation for 10/100/1000/2500 Mbps. It supports NBASE-T and 2.5GBASE-T standards, allowing full 2.5Gbps speed over existing Cat5e cabling, saving upgrade costs. OS compatibility is broad: Windows 7+, macOS, Linux (LTS Kernel 4.19+), ChromeOS, and iOS all work with built-in drivers or automatic updates. Advanced features include Wake-on-LAN, VLAN tagging, PXE boot, and 16K jumbo frames, making it suitable for enterprise networks. The adapter is bus-powered via USB-C, so no external power supply is required; however, to use the PD passthrough function, a USB-C charger must be connected to the adapter's input port.
Product Info
Released in late 2024, this adapter is priced around ¥6,372 on . StarTech.com is a well-known Canadian manufacturer of business-grade PC accessories. This product sits in the mid-to-high range of network adapters, as few competitors offer both 2.5GbE and 100W PD passthrough in such a compact form factor. It offers strong value for users who need to maximize limited ports. The warranty is 2 years from the manufacturer. The package includes the adapter with an integrated 15cm cable and a quick-start guide. The casing is space gray with a metal-like finish, giving it a professional appearance.
Best Use Cases
This adapter is ideal for users with limited USB-C ports who need both charging and wired networking simultaneously. For example, MacBook Air/Pro users can connect to a 2.5Gbps network while charging at full speed without occupying extra ports. It also suits remote workers and hot-desk setups that require stable wired connections for video conferencing or large file transfers. Gamers and content creators handling large assets will benefit from more reliable, higher throughput compared to Wi-Fi. Additionally, users who frequently back up to NAS or servers will appreciate the 2.5Gbps bandwidth for faster transfers.