StarTech.com US1GC30B2 · USB network adapter

MPN / P/N

US1GC30B2

Manufacturer designation

USB-C to Ethernet Adapter, USB 3.0 to Gigabit Ethernet Network Adapter, 10/100/1000 Mbps, USB-C to RJ45 Ethernet Adapter (GbE), 12in Attached Cable, Driverless Install

Manufacturer conditions

Jumbo Frames are no longer supported in macOS

System and cable requirements

USB Type-C port

Power source

Bus Powered

Input voltage

5V DC

Output voltage

5 DC

Colour

Space Gray

Network adapter form factor

Attached Cable

Material

ABS

Cable Length

11.8 in [30 cm]

Product length

14.8 in [37.7 cm]

Product width

1.1 in [27 mm]

Product height

0.6 in [15.0 mm]

Product weight

1.0 oz [28.0 g]

Operating temperature

0C to 45C (32F to 113F)

Storage temperature

-10C to 70C (14F to 158F)

Humidity

10% to 85%

Maximum documented data rate

5 Gbps (USB 3.2 Gen 1); 2 Gbps (Ethernet - Full Duplex)

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

MTBF — not warranty duration

262,800 hours

Number of ports

1

Interface

RJ45 (Gigabit Ethernet)

Bus type

USB 5Gbps

Industry standards

IEEE802.1Q (VLAN tagging); IEEE802.3az Energy Efficient Ethernet (EEE); Wake-on-LAN (WOL); IEEE 802.3 10BASE-T; IEEE 802.3u 100BASE-TX; IEEE 802.3ab 1000BASE-T

Chipset ID

Asix - AX88179A

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