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ATTO ThunderLink NQ 3401
40Gb/s Thunderbolt 3 (2-port) to 40GbE (1-Port) Adapter (includes SFPs)

ATTO ThunderLink NQ 3401

ATTO Technology Products
ATTO ThunderLink Thunderbolt Adapters
ATTO ThunderLink NQ 3401 Dual 40Gb to Single 40Gb Ethernet Thunderbolt 3 Adapter, QSFP+ included
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ATTO ThunderLink NQ 3401 Dual 40Gb to Single 40Gb Ethernet Thunderbolt 3 Adapter, QSFP+ and IEC C-13 power cord included
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The ATTO ThunderLink NQ 3401 acts as an external Thunderbolt 3 to 40GbE adapter, connecting Thunderbolt enabled all-in-one workbooks and workstations to 40Gb/s Ethernet networks and storage devices. Ethernet ThunderLinks are the premier connectivity choice for bandwidth-intensive applications such as data back-up and restoration, clustered computing, IP content delivery, medical imaging, and video rendering. Thunderbolt 3 technology provides four times the data and twice the video bandwidth of any other cable. ATTO combines cutting- edge Thunderbolt 3 technology with time tested Ethernet expertise to deliver superior throughput to meet the growing bandwidth requirements needed today.

All ATTO Thunderbolt product utilize Advanced Data Streaming (ADS) Technology which maximizes CPU processes to deliver smooth and reliable data transfers and the highest consistent performance as well as our easy to use ConfigTool, an intuitive GUI, which enables management, monitoring and configuration.

Technical Features

  • Dual Thunderbolt 3 (40Gb/s USB-C) connectors
  • Single 40GbE (QSFP+) port (module included)
  • Supports 4K video file transfer and display simultaneously with dual 40Gb/s Thunderbolt 3
  • Daisy chain up to five additional thunderbolt technology-enabled devices
  • Backwards compatible with 20Gb/s and 10Gb/s Thunderbolt hosts via Apple legacy adapter
  • Exclusive Advanced Data Streaming (ADS) technology
  • Minimized interrupts for low latency
  • TCP, UDP and IPv4 checksum offloading and Tx/TCP segmentation offloading
  • Industry's lowest power consumption
  • Support for downstream USB 3.1 and 2.0 devices
  • Three year standard product warranty
  • RoHS Compliant

Industry Proven Technology

ATTO Technology has 30 years of experience developing and delivering reliable storage connectivity solutions for customers. ATTO ThunderLink Ethernet adapters now provide creative professional using Thunderbolt enabled hosts, cost effective access to storage not previously available using FireWire or USB. The integrated family of ThunderLink adapters boasts an extensive list of customer design wins and certifications with respected industry partners.

Flexible Connectivity Solutions

ATTO 40GbE adapters provide the most flexible and scalable connectivity for today's high bandwidth content creation environments. ThunderLink 40GbE adapters offer driver support for Windows and macOS, VMware, providing a single connectivity solution for customers with heterogeneous operating system environments.

Performance Engineered

With 40Gb data transfer rates and multiple offloads (TCP, IPv4, UDP), ATTO Ethernet devices are the premier connectivity choice for bandwidth-intensive applications such as data back-up and restoration, IP content delivery, medical imaging, and video rendering. With mult-core processors driving the need for higher bandwidth, ThunderLink 40GbE delivers superior throughput to meet that need.

Advanced Management Tools

ThunderLink 40GbE adapters provide a common foundation for both local and storage networks. The ThunderLink leverages standard OS management and monitoring tools to dramatically reduce the cost and complexity of a data center's administration and infrastructure.


ThunderLink 40GbE adapter solutions allow the unparalleled performance of 40GbE to meet the performance and economic needs of today's growing data centers. The ThunderLink is ideal for applications that require low latency, high bandwidth data transfers, such as data back-up and restoration, video-on-demand and video streaming, medical imaging, and clustered databases.

Advanced Data Streaming (ADS)

Latency-management technology that controls the acceleration of data transfers to move large amounts of data faster and more efficiently.


ATTO ThunderLink Fibre Channel adaptersPurpose-built with your design needs in mind

Meet demands for increased portability, decreased footprint and noise-sensitive environments with a low profile, cool, ultra-quiet device. ThunderLink adapters are simple to stack, easy to install and are designed to integrate seamlessly into existing infrastructures. The ability to hot-plug and full support of daisy-chaining allows you to reconfigure on-the-fly and empowers scalability as workgroups grow.

Spend less time managing equipment and more time creating

Trust your units are powered, ready-to-go and have uninterrupted power with locking power supplies. Now shipping with every Thunderbolt adapter, Kensington Security Slots provide a simple solution for studios, offices and educational facilities, allowing units to be easily secured to a fixed location.


An investment in a ThunderLink comes with knowing our team of experts has sweat the finest of details to provide you superior performance, design and ease of use over the competition.

It's time to watch your throughput grow

Finally combat compressed schedules and allow for more time creating high-quality deliverables by optimizing performance, up to 2750MB/s for Thunderbolt 3. Smooth and reliable data delivery via ATTO Advanced Data Streaming (ADS) technology allows you to maintain the highest consistent performance while working with HD, 2K, 4K and higher formats.

Advanced Data Streaming (ADS)


Build out a workflow the way you need it

Expand your connectivity choices with the widest portfolio of Thunderbolt adapters across Fibre Channel, Ethernet and SAS and 4X more interoperable components than the closest competitors. Any needed optics (SFP+, QSFP+) are already included and rigorously tested to ensure compatability and data integrity. Mac and Windows Thunderbolt certification enables collaborative workflows and the only Thunderbolt adapter certified with VMware ESXi allows deployments of a one-of-a-kind solution for test and development environments.

ATTO Thunderbolt 16Gb Adapter Interoperable Storage Systems

Thunderbolt Solutions have never been easier

Improve overall workflow efficiencies using ATTO MultiPath Director drivers for Fibre Channel by providing uninterrupted and consistent data by enabling load balancing and failover. ATTO ConfigTool provides an easy to use, yet powerful GUI for customizing, managing and optimizing your products. Backed by our extensive history and expertise in connectivity solutions, if any issues do arise, we have an on-site support team ready to diagnose technical issues and resolve them in a timely manner.


ATTO ThunderLink

  TLNQ-3401 TLNQ-3402
ATTO ThunderLink TLNQ-3401 TLNQ-3402
Transfer Rate 40Gb/s 40Gb/s
Input Connectors (2) 40Gb/s Thunderbolt (2) 40Gb/s Thunderbolt
Output Connectors (1) 40Gb/s Ethernet (2) 40Gb/s Ethernet
Connector Type Thunderbolt 3 / QSFP+ Thunderbolt 3 / QSFP+
Included SFPs/QSFPs 1 QSFP+ 2 QSFP+
Form Factor Desktop
General Features
  • Data rate per port: 40GbE
  • Tx/TCP segmentation offload (Large Send Offload-LSO)
  • Low latency interrupts
  • PCI-SIG SR-IOV support
  • Interrupt levels MSI, MSI-X
  • Plug and play specification support
  • Advanced Packet Filtering
  • VLAN support with tag filtering, insertion and stripping
Advanced Software Features
  • Adaptive load balancing
  • Teaming support
  • PCI Hot Plug/Active peripheral interconnect
Management Tools
  • Easy system monitoring with Simple Network Management Protocol (SNMP) and Remote Network Monitoring (RMON) Statistic Counters
  • Watchdog timer for chip/driver status monitoring
Network Standards
  • IEEE802.3ba (40 Gigabit Ethernet)
  • IEEE802.3az (Energy Efficient Ethernet)
  • IEEE802.1p (Priority Encoding)
  • IEEE802.1q (VLAN tagging)
  • IEEE802.3ad (Link aggregation)
  • IEEE802.1qbb (Priority flow control)
  • IEEE802.1qaz (Enhanced Transmission)
  • IEEE8023.AD (Load-balancing, failover)
Operating System Support
  • Windows
  • macOS
External Connectivity
  • 40Gb/s , 10Gb/s, 1Gb/s QSFP+ MTP/MPO connectors
  • 2 LED indicators per port
  • FCC Part 15, Subpart B, Class B
  • EN55032, ClassA/EN55024
  • EN60825-1
  • EN60825-2
  • EN60950-1
  • cTUVus
  • EU RoHS (2011/95/EC)
  • TAA Compliant (country of origin:USA)
Dimensions 8.66"(D) x 4.07"(W) x 1.20"(H)
Power Adapter
  • Input: 100-240VAC, 50-60Hz, 0.6A Max
  • Output: 12VDC
Hardware Operating Temperature
  • Temperature: 0°-40° C (34°-104° F)
  • Humidity: 10%-90% non-condensing
Storage Operating Temperature
  • Temperature: -40°-70° C (-40°-157° F)
  • Humidity: 5%-95% non-condensing
Warranty Three-year standard product warranty
Complementary Products
  • ATTO Celerity Fibre Channel HBAs
  • ATTO ExpressSAS HBAs and RAID Adapters
  • ATTO FastFrame NICs
  • ATTO FibreBridge Fibre Channel storage controllers
  • ATTO Thunderbolt adapters
  • ATTO premium cables
Thunderbolt Cabling
  • 40Gb/s cables are designated with a 3" marking
    • Active
      1M - 40 Gb/s performance
      2M - 40 Gb/s performance
    • Passive
      .5m - 40 Gb/s performance
      1m - 20 Gb/s performance
      2m - 20 Gb/s performance


The ATTO Difference - Advanced Data Streaming

Latency management technology is built into ATTO host bus adapters (HBAs) and RAID hardware. Advanced Data Streaming manages latency by providing controlled acceleration for smooth data streaming to maintain the highest consistent performance. ADS ensures best-in-industry data transfers for high-bandwidth applications.

ATTO ThunderRack Rackmount Shelf:

Seamless Rackmount Solutions

Looking for a way to mount and organize Thunderbolt ThunderLink Adapters?

ThunderRack shelving enclosure gives the ability to easily rack units, whether in an on-set cart or standard rack in the data center. Now you can seamlessly integrate ThunderLink adapters into existing workspaces and keep units safe and secure all while freeing up desktop space.


  • Fits up to four ATTO ThunderLink Adapters
  • Slim 1U form-factor
  • Fits traditional 19" rack environment
  • Rack 21" depth , extend 32" with included L-Bracket or optional rail kit
  • Note: Cabinet depth must be 26" or higher to use rail kit
  • Easily manage power supplies
  • Simple access to single-sided Thunderbolt and protocol ports
  • Designed for optimal airflow
  • Operating temperature recommendation is 0 - 30C for all models

ATTO ThunderRack Rackmount Shelf


Download the ATTO ThunderLink NQ 3401 Datasheet (.PDF)

Pricing Notes:

ATTO Technology Products
ATTO ThunderLink Thunderbolt Adapters
ATTO ThunderLink NQ 3401 Dual 40Gb to Single 40Gb Ethernet Thunderbolt 3 Adapter, QSFP+ included
Get a Quote!
ATTO ThunderLink NQ 3401 Dual 40Gb to Single 40Gb Ethernet Thunderbolt 3 Adapter, QSFP+ and IEC C-13 power cord included
Get a Quote!
ATTO ThunderLink Rackmount
ATTO ThunderRack, ThunderLink Rackmount Shelf
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ATTO ThunderRack, ThunderLink Rail Kit
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ATTO Accessories
ATTO Locking Power Supply Kit for Thunderbolt Adapters
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