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Item#: N82E16817659005

Tek Republic TUN-300 USB 3.0 to Gigabit Ethernet Network Adapter

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  • Chipset: ASIX AX88179
  • Automatic driver installation via Windows Update on Windows 8/7/XP, 32/64 bit
  • IPv4/IPv6 checksum offload, crossover detection and auto correction

  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The Tek Republic TUN-300 USB 3.0 Gigabit network adapter adds a RJ45 Ethernet port to any USB-enabled PC. The USB 3.0 maximizes network access speeds and provides up to 5GBps at USB 3.0 bus levels. The TUN-300 is a compact USB 3.0 network adapter that is backwards compatible with older USB 2.0/1.x computer systems (speed limited by USB bus), which makes it the ideal portable replacement network adapter. Also, with support for features such as Jumbo Frames, VLAN tagging and Wake on LAN (WOL), the adapter is a versatile Gigabit network solution for home and business users alike.


  • Gigabit Ethernet at USB 3.0 Speed
  • Supports 10/100/1000 with auto-sensing IEEE 802.3, 802.3u and 802.3ab (10BASE-T, 100BASE-TX, and 1000BASE-T)
  • Crossover Detection & Auto-Correction (Auto MDIX)
  • Supports Checksum Offload (IPv4, IPv6, TCP, UDP) and Large Send Offload
  • Lightweight & Portable
  • ASIX AX88179 Chipset


Connectors 1 x RJ45 (Gigabit Ethernet) and 1 x USB 3.0 A male
Chipset ID ASIX AX88179
Data Transfer Speed 5Gbps, 480 / 12 / 1.5Mbps
Compatible Networks 10/100/1000Mbps - IEEE 802.3i, IEEE 802.3u, IEEE 802.3ab, and IEEE 802.3az
Auto MDIX Yes
Full Duplex Support Yes
LED Indicators Activity (Yellow) Link (Green)
Dimensions (L x W x H) 2.6 x 1 x 0.6"
Weight 0.03lbs
Operating System Support Windows XP / Vista, Windows 7/8 and Mac OS X v10.6 or later

Learn more about the Tek Republic TUN-300


Tek Republic


Chipset: ASIX AX88179
Speed: 10 / 100 / 1000 Mbps


Connector A
USB 3.0
Connector B


Chipset: ASIX AX88179

Speed: 10 / 100 / 1000 Mbps

Compliant with Universal Serial Bus 3.0 Specification, Revision 1.0

Supports full duplex operation with IEEE 802.3x flow control and half duplex operation with back-pressure flow control

Compatible with IEEE 802.3, IEEE 802.3u, IEEE 802.3ab

Supports IEEE 802.3az (Energy Efficient Ethernet) auto-detect usage for energy saving adjustment

Supports crossover detection and auto-correction

Supports Wake-on-LAN

Support Windows 2000 / XP / Vista / 7 / 8 (32 / 64 bit) and 2003; Mac OS X 10.6 / 10.7 / 10.8; Android 1.x / 2.x / 3.x / 4.x, and Linux

kernel 2.6.14 and later

Windows 8 Compatible

Download latest driver on manufacturer product page

Dimensions & Weight

2.60" x 1.00" x 0.60"
0.03 lb.
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
  • Return Policies
    • Return for refund within: 45 days
    • Return for replacement within: 1 year
  • This item is covered by's 45/1 Return Policy.
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