• Overview
  • Tech Specs
  • Performance
  • Accessories

World's Fastest Bus-Powered Portable Storage Device

Incorporating the latest PCIe Gen 3 SSD and
Thunderbolt Technologies

Do your portable storage requirements include maximum performance, pocket-sized mobility, bus-powered operation, and rugged reliability? The Sonnet Fusion™ Thunderbolt™ 3 PCIe® Flash Drive delivers it all:

Check MarkStunning Performance Over Thunderbolt 3 From a Single Memory Module—No RAID 0 of multiple drives needed for maximum performance

Check MarkBus-powered for Complete Portability—No power
adapter needed

Check MarkSmall and Rugged—Fits easily in your pocket, solid
aluminum case

Intel Thunderbolt Button

More Than 2100 MB/s BugKey Features

Ultra Performance
Data transfer rates up to 2100 MB/s(1) to support 4K workflows

Bus-Powered—Achieve total mobility without the need for a power adapter

Pocketable—Fits in the palm of your hand

40Gbps Thunderbolt 3 Interface—Connects to any Thunderbolt 3 computer port, or at the end of a Thunderbolt 3 device daisy chain

Rugged Construction—Aluminum enclosure withstands heavy use

Windows® Compatible—Connects to any Windows PC with a Thunderbolt 3 port


Fusion Thunderbolt 3 PCIe Flash Drive In Palm of Hand Icon4K Video Workflow Support—
In the Palm of Your Hand4K Display

Sonnet’s Fusion Thunderbolt 3 PCIe Flash Drive leverages the latest advancements in solid state storage and Thunderbolt 3 technology to create a device that delivers performance unimaginable a short time ago, yet fits neatly in the palm of your hand. It is especially well suited to serve as an ultra-fast portable scratch drive for editing raw 4K video at higher frame rates, or even performing IT duties like installing applications and operating systems. You can even employ the Fusion flash drive for instant-access media storage or as a high-performance shuttle drive.

Feature Icons


SSD Icon

Designed with Latest SSD Technology

Sonnet designed the Fusion Thunderbolt 3 PCIe Flash Drive around a Gen 3 M.2 PCIe SSD module, the fastest standard SSD type now available. It connects directly to any Windows computer with a Thunderbolt 3 port, or at the end of a Thunderbolt 3 device daisy chain, via a captive 0.5-meter Thunderbolt 3 (40Gbps) cable.

Speed Dial Icon

Amazing Transfer Speeds & Performance

The Fusion Thunderbolt 3 PCIe Flash Drive incorporates a PCIe Gen 3 flash controller that enables the device to outperform USB 3.0 flash drives by more than 400%, and is capable of transferring files at rates up to 2100 MB/s.(1)




Fusion Thunderbolt 3 PCIe Flash Drive

Pro Thunderbolt Storage Icon Pro Thunderbolt Storage
Connects one high-performance PCIe Gen 3 SSD to any Windows PC with a Thunderbolt 3 port
Superior Performance Icon Superior Performance
Transfers data at up to 2100 MB/s(1)
Pocketable Icon Pocketable
Fits in the palm of your hand – only 2.8 x 4.1 x 1.25 inches (WxDxH)
Thunderbolt 3 Interface Icon Thunderbolt 3 Interface
Connects to any Thunderbolt 3 computer port, or at the end of a Thunderbolt 3 device daisy chain
Rugged Construction Icon Rugged Construction
Aluminum enclosure withstands heavy use
Bus-Powered Icon Bus-Powered
Powered through Thunderbolt
connection; no power adapter

Location of Captive Thunderbolt 3 CableReplaceable Captive Cable

Through the use of a captive cable, the Fusion Thunderbolt 3 PCIe Flash Drive's Thunderbolt cable remains firmly connected to it at all times. Should the cable ever break, it can easily be replaced by Sonnet or a Sonnet-authorized service center.

See Tech Specs Tab for footnotes
Part No.  
FUS-TB3-512GB-W Discontinued
Warranty 1-year
Form Factor Portable storage enclosure
Bus Interface 40Gbps Thunderbolt 3
Power Bus-powered via Thunderbolt connection
Operating Temperature 0˚ C to 40˚C (32˚ F to 104˚F)
Data Transfer Speed Up to 2100 MB/s, depending on computer(1)
Dimensions (WxDxH) 2.8 x 4.1 x 1.25 in (70 x 103.2 x 31.5 mm)
Weight 12.25 oz. (347.28 gm.)
RoHS Compliant Yes
Package Contents
  • Fusion Thunderbolt 3 PCIe Flash Drive with captive 0.5-meter Thunderbolt 3 (40Gbps) cable
  • Documentation


Specifications subject to change without notice.





PC Compatibility

PC with a Thunderbolt 3 port

Windows 10

Technical Notes

  1. Some computers equipped with Thunderbolt 3, such as the Dell Precision 3510 and the Alienware 13 R2, use an implementation of Thunderbolt 3 technology that will result in performance numbers of up to 1400 MB/s.

Windows logoPCI Express LogoRoHS Compliant logo



Fusion Thunderbolt 3 PCIe Flash Drive – Windows Edition
Performance Comparison

Fusion Thunderbolt 3 PCIe SSD Flash Drive Speed Chart

Testing performed using HP ZBook 15 G3 with Intel® Core™ i5-6440HQ, 2.6 GHz with 8GB RAM, running Windows 7 Professional 64-bit. Performance with your computer may differ(1).


Accessories Part No. Description
ThunderLok 3 (2-Pack) ThunderLok 3 Thunderbolt 3 Connector Retainer Clip (2-Pack) TB3-LOK2 Secures 0.5-meter Thunderbolt 3 cables and 1–2 meter Thunderbolt 3 (20Gbps) cables with ThunderLok 3-compatible products