StarTech.com US1GC30DB · USB network adapter

MPN / P/N

US1GC30DB

Manufacturer designation

USB C to Gigabit Ethernet Adapter - 1Gbps NIC USB 3.0/USB 3.1 Type C Network Adapter - 1GbE USB-C to RJ45/LAN Port Thunderbolt 3 Compatible Windows MacBook Pro Chromebook

Manufacturer conditions

Jumbo Frames are no longer supported in macOS

System and cable requirements

Available USB Type-C port

Power source

USB-Powered

Input voltage

5V DC

Output voltage

5 DC

Colour

Black

Network adapter form factor

Dongle

Material

Plastic

Product length

2.0 in [51.0 mm]

Product width

0.8 in [20.2 mm]

Product height

0.5 in [13.0 mm]

Product weight

0.3 oz [9.0 g]

Operating temperature

0C to 60C (32F to 140F)

Storage temperature

-10C to 80C (14F to 176F)

Humidity

5% ~ 90% RH

Maximum documented data rate

5 Gbps (USB 3.0); 2 Gbps (Ethernet - Full-Duplex)

Type and rate

USB 3.0 (5Gbps)

Compatible networks

10/100/1000 Mbps

Auto MDIX

Yes

Full-duplex support

Yes

Jumbo-frame support — manufacturer limit

9K max.

Wake-on-LAN — manufacturer conditions

Yes

Number of ports

1

Interface

RJ45 (Gigabit Ethernet)

Bus type

USB 5Gbps

Industry standards

IEEE 802.3, 802.3u and 802.3ab

Chipset ID

Realtek - RLT8153

LED Indicators

1 - Power; 1 - Activity

Connector 1 (Quantity)

1

Connector 1

USB-C (5Gbps, 4.5W)

Connector 2 (Quantity)

1

Connector 2

RJ-45

Documented selection limits

Match the exact host interface, peripheral/device protocol, connector, firmware, OS/driver and power requirements before ordering. Published maximum rates are interface limits, not guaranteed application throughput. No universal device or current/future OS compatibility is implied. Match USB host generation and OS/driver support; USB bus bandwidth may limit Ethernet line-rate performance. Fiber/SFP variants require the correct transceiver/link partner, supplied modules must be checked. RJ45 Ethernet does not imply PoE output.

Specification source: StarTech.com ↗
Checked against documentation: 16.10.2026