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Small black USB-C to RJ45 network adapter with short cable

STARTECH

STARTECH US1GC30B USB-C to Gigabit Ethernet Adapter

SKU CH-RNCV-X8TJS MPN US1GC30B

Adds a Gigabit Ethernet port through a USB-C connection with native driver support and Thunderbolt 3 compatibility

  • Rated speed10/100/1000 Mbit/s
  • Supported standardsIEEE 802.3, 802.3u and 802.3ab
  • Connection typesConnector Type (s): 1 - USB Type-C (24 pin) USB 3.0 Male Ext
  • Temperature rangeOperating Temperature: 0 to 70 degree Celsius (32 to 158 deg
  • Humidity range5% ~ 90% RH
  • Key featuresAdd a Gigabit Ethernet network connection to your computer t
  • Gigabit Ethernet over USB-C at 10/100/1000 Mbps with auto-detection
  • Instant native driver support means no downloads or setup required
  • Thunderbolt 3 compatible for use with the newest laptops and desktops
  • Compact 0.60" x 8.30" x 1.00" design weighs just 0.19 lb for travel
  • Powered directly from the USB port so no external adapter is needed

USB-C Gigabit Ethernet Adapter

The StarTech US1GC30B adds a wired network port to laptops and desktops that only have USB-C connectivity. It connects through a USB 3.1 Gen 1 interface and delivers 10/100/1000Mbps speeds with auto-detection. Native driver support provides instant connection without downloads. The compact adapter draws power directly from the host port.

Upgrade from Missing or Slow Ports

This adapter replaces a missing onboard Ethernet jack or supplements a slower 100Mbps connection. The jump is worth it when you need reliable gigabit throughput for large file transfers or stable video calls. It supports checksum and large send offload to reduce CPU load during sustained traffic. Systems without USB-C cannot use this adapter.

Fits USB-C Workstations

The 24-pin USB-C plug works with Thunderbolt 3 ports and standard USB 3.0 Type-C sockets. No external power supply is required, freeing up outlets and keeping cable count low. Operating range spans 0 to 70 degree Celsius for office or field use. The package contains only the adapter itself.

How it compares

Measured against everything we stock in Ethernet Cards & NICs, at today’s prices. Recalculated every night.

Price $31.99
Cheaper than about 82% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameStarTech.com
Model nameUS1GC30B
Performance
Rated speed10/100/1000 Mbit/s
Connectivity
Supported standardsIEEE 802.3, 802.3u and 802.3ab
Ports & slots
Connection typesConnector Type (s): 1 - USB Type-C (24 pin) USB 3.0 Male
External Ports: 1 - RJ-45 Female
Size & build
Product dimensions0.6 in × 8.3 in × 1 in
Product weight0.19 lb (0.09 kg)
Shipping weight0.09 kg
Package size170 × 142 × 28 mm
In the box
In the box1 - USB-C to GbE network adapter
Environment & compliance
Temperature rangeOperating Temperature: 0 to 70 degree Celsius (32 to 158 degree Fahrenheit)
Storage Temperature: -10 to 80 degree Celsius (14 to 176 degree Fahrenheit)
Humidity range5% ~ 90% RH

Questions about this item

What USB-C port dimensions does the 0.60" x 8.30" x 1.00" adapter need for a secure fit?

The adapter plugs into any standard USB Type-C (24 pin) USB 3.0 male port and requires no extra clearance beyond its 0.60" x 8.30" x 1.00" body.

Which step do users miss when installing the adapter on a Thunderbolt 3 port?

Simply insert the USB-C connector; native driver support in IEEE 802.3, 802.3u and 802.3ab standards gives instant 10/100/1000Mbps Ethernet with no downloads required.

When should the RJ-45 female port be checked for wear?

Inspect the RJ-45 port if link lights fail or speeds drop below 10/100/1000Mbps; the adapter has no moving parts and operates from 0 to 70 °C.

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