Gigabit Ethernet USB3.1 Gen 1 Adapter w/4KVrms Isolation and Mounting Kit

Gigabit Ethernet Super-Speed USB 3.1 4KV Isolated Adapter

Expand or upgrade to a Gigabit Ethernet network using USB 3.1 Gen1 specifications. 4KV isolation is on the Ethernet port protecting your network connection. Small, Compact, and Mountable to DIN Rails or flat surfaces, the CG-31G1EA4K is a great solution to a faster and safer network connection.

  • Compliant with USB Specification 3.1 Gen 1 at up to 5Gbps data speeds.
  • Supports Wall Mounting Kit and Optional DIN RAIL
  • Adds a RJ45 Gigabit Ethernet Port (10/100/1000M)
  • Supports 4KVAC Isolation for Ethernet Port


Out of Stock

Model No. CG-31G1EA4K

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USB 3.1 Gen1 Gigabit Ethernet Adapter with 4KV Isolation

The CG-31G1EA4K is a USB3.1 Gen1 Gigabit Ethernet Adapter with 4KV Ethernet circuit Isolation. It provides an instant gigabit connection to your Notebook, Desktop, Server and Thin-Client computers. Once connected to an available USB port, you’re ready for gigabit network speeds with USB3.1 Gen 1 Super-Speed support.

USB 3.1 Type-B and Ethernet Cables Connected

The Universal Serial Bus (USB) 3.1 Gen 1 specification provides Super-Speed data transmission up to 5Gbps. Upgrade your network to lightning-fast gigabit speeds for large file transfers, data backups or access your network storage.

USB 3.1 is the renamed specification of USB3.0 and is the most popular external port interface for devices to connect to PCs. The CG-31G1EA4K provides an ideal solution to expand your Ethernet port immediately and save your investment.

Gigabit Ethernet 4KV Isolated Adapter Features

  • Compliant with USB Specification 3.1 Gen 1
  • Supports Wall Mounting Kit and Optional DIN RAIL
  • Mounting Kit for Industrial Critical Applications
  • Adds a RJ45 Gigabit Ethernet Port (10/100/1000M)
  • An Upstream Type-B USB3.1 Gen 1(5 Gbps) Port, Backward Compatible with USB2.0 and USB1.1
  • Easy Installation for Windows, Simply Plug and Go
  • Supports all USB Power Saving Modes
  • Supports 4KVAC Isolation for Ethernet Port
  • Supports IEEE 802.3, 802.3u, and 802.3ab, 802.1Q
  • Supports IEEE 802.3az-2010 (Energy Efficient Ethernet)
  • Supports Jumbo Frames up to 9K Bytes
  • Supports Microsoft AOAC (Always On Always Connected)
  • LEDs for Ethernet Status and Data Transferring Speed
  • Supports USB Screw-Lock Cable Mechanism
  • Supports Windows, Mac OS and Linux
  • Item Weight: 2.0 oz.



For Systems with USB3.1 Gen 1 (USB3.0), USB2.0, or USB1.1 Ports

USB 3.1 Gen1 Port

  • Compliant with USB Specifications 3.1 Gen 1
  • Plug and Play and Hot-swappable, no additional hardware installation required
  • Backward compatible with USB2.0 and 1.1 Standards
  • Supports USB Screw-Lock Features
  • Supports USB Power Saving Features

Gigabit Ethernet Port

  • IEEE 802.3, 802.3u, and 802.3ab Compatible
  • Supports IEEE 802.3az (Energy Efficient Ethernet)
  • Provides LINK/ACT and SPEED LED Indicators
  • Built-in Supports IPv4/IPv6 packet Checksum Offload Engine (COE)
  • Supports 10/100/1000M Ethernet Speeds
  • Onboard Windows Drivers, Simply Plug and Go
  • Ethernet Port Supports 4K VAC Isolation
  • Supports suspend mode and remote wake-up
  • Supports crossover detection and auto- correction
  • Supports Flexible Mounting Options
  • Supports 9K-Byte Jumbo frame

Operating Systems

  • Microsoft Windows 10, 8.x (x86, x64), 7 (x86, x64), Vista XP
  • Windows Embedded Compact 7 (CE 7.0), CE 6.0 and CE 5.0
  • Linux
  • Mac OS X

I/O Hardware

  • Supports 1 Upstream USB3.1 Type-B connector with Screw Lock Mechanism.
  • Supports 1 Gigabit RJ45 connector with Speed and Link/Act LED Indicators


  • Operating Temp.: 0 to 70°C (32 to 131°F)
  • Storage Temp: -20 to 85°C (-4 to 185°F)
  • Operating Humidity: 5 to 95% RH

Form Factor

2.56in(L)x1.67in(W)x0.81in(H) (65.0 x 42.5 x 20.5 mm)

Package Contents

  • Gigabit Ethernet USB 3.1 Gen1 Adapter
  • Clip-on Mounting Plate
  • 5ft. USB 3.0 Screw lock A to B cable
  • Paper Installation Guide

Product Specifications

Country of Origin




Mounting Style

Din-Rail, Surface Mount


1 Ethernet Port, 1 USB Port

USB Type

USB 3.1

Isolated/Surge Protected


Operating Temperature

0C to 70C

Isolated/Surge Protected



.562 lbs


9.00 × 6.250 × 1.637 in

UPC: 045079160439

Product Documentation & Drivers

Need drawings, CAD files, or other compliance documentation? Click HERE

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