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Compact black USB-C to RJ45 network adapter with short attached cable

StarTech.com US1GC30B USB-C to Gigabit Ethernet Adapter, Thunderbolt 3 /4 Compatible, Black

SKU CH-8CDJ-2FX83

Adds a Gigabit Ethernet port through USB-C with Thunderbolt 3 and 4 compatibility for reliable wired networking

  • ColorBlack
  • Weight0.022 kilograms
  • Gigabit Ethernet via USB-C and Thunderbolt 3 or 4
  • Realtek RTL8153 chipset enables driver-free setup on Windows, macOS and Linux
  • USB 3.2 Gen 1 5 Gbps host link delivers full 10/100/1000 Mbps throughput
  • Compact 22 g dongle with attached cable for portable wired networking
  • Supports 9K jumbo frames, VLAN tagging and Wake-on-LAN for managed networks

USB-C Gigabit Adapter for Laptops

The StarTech.com US1GC30B adds a wired RJ45 network port to any device with a USB-C or Thunderbolt 3 or 4 socket. It supports 10, 100 and 1000 Mbps Ethernet speeds using the Realtek RTL8153 chipset. The adapter is bus-powered and weighs .022 kilograms. It suits mobile workers who need a stable connection instead of Wi-Fi.

Upgrade from Wi-Fi or Missing Port

This adapter replaces a missing built-in Ethernet jack or supplements unreliable wireless on ultra-thin laptops and 2-in-1 devices. The jump is worth it when transferring large files, joining video conferences or accessing network shares that demand consistent 1000 Mbps throughput. It does not help buyers who want multi-gigabit speeds beyond 1 Gbps or who need a second simultaneous network interface.

Plug-and-Play Installation

No driver install is required on Windows 7 and up, macOS 10.14 and up, Linux kernel 4.11 LTS, ChromeOS, Android and iOS on iPhone 15 and newer. The attached cable reduces loose-connection risk. The main issue arises when the host USB-C port lacks data lanes or supplies insufficient power, causing the link to negotiate at 100 Mbps instead of 1000 Mbps.

Highlights

  • Gigabit Ethernet via USB-C and Thunderbolt 3 or 4
  • Realtek RTL8153 chipset enables driver-free setup on Windows, macOS and Linux
  • USB 3.2 Gen 1 5 Gbps host link delivers full 10/100/1000 Mbps throughput
  • Compact 22 g dongle with attached cable for portable wired networking
  • Supports 9K jumbo frames, VLAN tagging and Wake-on-LAN for managed networks

Specifications

BrandStarTech.com
ModelUS1GC30B
ColorBlack
Weight0.022 kilograms

Questions about this item

What host port does the US1GC30B plug into?

It connects to a USB 3.2 Gen 1 Type-C port and also works with Thunderbolt 3 and Thunderbolt 4 ports.

What is the one step people forget when installing this adapter?

Plug it into a USB-C port that supports data, not a charging-only port, otherwise the network link will not appear.

When will the attached cable need replacing?

Replace the cable if the connectors become loose, the jacket shows cuts, or the link drops to 10 or 100 Mbps on a known-good 1000 Mbps network.

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