Sonnet SF3 Series

Home Sonnet SF3 Series - CFast 2.0 Pro Card Reader
Professional dual-slot CFast 2.0 card reader for Mac and Windows computers with Thunderbolt 3 ports. Supports ingest from any CFast card at maximum speeds, and simultaneous ingest of two cards at up to 1000 MB/s. Features a 40Gbps Thunderbolt 3 interface with replaceable, captive 0.5-meter Thunderbolt 3 (40Gbps) cable.
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SF3 Series -CFexpress/XQD Pro Card Reader

Professional Dual-Slot CFexpress 2.0 Type B/XQD Card Reader for Computers with Thunderbolt 3 Ports


Superior Ingest Performance

Whether you’re capturing 4K at 60P RAW video footage toCFexpress™ memory cards, or shooting hundreds of photos in a session and saving them to XQD™ memory cards, the generated files are huge, and the cards fill up fast. Moving those files to your computer for editing is a must, but if you use the wrong tool, you’ll spend a lot of time waiting around. Get a Sonnet SF3™Series - CFexpress/XQD Pro Card Reader; it’s the ultimate tool for finishing the job fast.


Key Features


Superior Performance

Ingests footage from CFexpress 2.0 Type B cards and XQDcards at up to maximum supported speeds.


Cuts Ingest Times byup to Half

Dual card slots enable simultaneous ingest of footage fromtwo cards for greater efficiency.


Rugged, Compact,Stackable

Small and rugged aluminum enclosure for reliable operation;design enables multiple SF3 Series card readers to occupy same footprint.



Threaded mount points enable secure attachment of two readers side-by-side on a rack tray in just 1U of rack space.


40Gbps Thunderbolt™ 3Interface

Fastest interface available; offers 2750 MB/s of PCIe bandwidth.


Two Thunderbolt 3Ports

One port connects to computer; second port supports daisy chaining of up to five additional SF3 Series pro card readers.


Backward Compatible

With Thunderbolt 2 and Thunderbolt Macs when used with an Apple® Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter and a Thunderbolt cable(both sold separately).


Mac & Windows Compatible

Supports Mac and Windows computers.


Cut Ingest Times by up to Half

Dual Card Slots, Less Waiting

The SF3 Series - CFexpress/XQD Pro Card Reader is ultra-fast, able to ingest files from CFexpress and XQD cards at their maximum speeds. Better still, it can ingest files simultaneously from two CFexpress cards—at more than double the average ingest speed of other CFexpress or XQD card readers—to cut your ingest times in half.


Ready for Racking

Sonnet’s SF3 Series pro card readers include threaded mountpoints that enable you to securely attach two readers side-by-side on a rack tray in just 1U of rack space.


The CFexpress/XQD Reader for Digital Imaging Technicians (DITs)

Measuring 5.75 inches wide by 1 inch tall by 3.5 inches deep, the SF3 Series - CFexpress/XQD Pro Card Reader is suitable for use in any workspace and workflow; for DITs working multi-camera shoots or in a small space, the Sonnet reader’s design advantages stand out.

Built with rugged aluminum enclosures, SF3 Series card readers are designed to be stacked and daisy chained, enabling multiple CFexpress/XQD, REDMINI-MAG®, SxS™, and CFast™ 2.0 readers to occupy the same footprint, while connecting to your computer through a single cable. Now you can take advantage of Thunderbolt 3’s 2750 MB/s bandwidth to ingest four, six or more cards simultaneously!

Fastest External Interface Available

Thunderbolt 3 - The USB-C That Does It All


Featuring a dual-port 40Gbps Thunderbolt 3 interface, this professional reader ingests footage from CFexpress 2.0 Type B or XQD memory cards to any Mac® or Windows® computer with Thunderbolt 3 ports—on location, in the studio, or in the edit suite—at the fastest speeds the cards will support.


Two Thunderbolt 3Ports

The SF3 Series - CFexpress/XQD Pro Card Reader features two Thunderbolt 3 ports; the first one used for connecting to your computer, while the second supports daisy chaining of up to five additional Thunderbolt peripheral devices(1) to a single port on your computer.


10Gbps USB 3.2 Gen 2Support

The reader includes 10Gbps USB 3.2 Gen 2 support, meaning you can connect a USB device to the second port using the proper cable or adapter.


Supports Two 4K or One 5K Display

The Sonnet reader also provides full support for connecting up to two 4K displays @ 60Hz or one 5K display @60Hz(2).


Provides 15W of Power

For connected devices requiring extra power, 15 watts is provided to bus-powered Thunderbolt 3 peripherals, such as the SF3 Series -CFast 2.0 ProCard Reader.


Included at No Extra Charge Thunderbolt 3 Cable. ThunderLok 3.

Sonnet includes a 0.5-meter Thunderbolt 3 (40Gbps) cable that, unlike some other cables, transfers data at Thunderbolt 3’s full 2750MB/s bandwidth, and supports up to 100W of Power Delivery (PD). In addition, Sonnet provides a ThunderLok 3 Thunderbolt connector retainer clip(3) that prevents accidental cable disconnections—just slide it over one end of the cable, and then plug in the connector and secure it to the chassis by turning a thumbscrew. Because of its unique design, ThunderLok remains on the cable so it won’t get lost when not in use.


Backward Compatible with Older Macs

No Thunderbolt 3? No problem—the SF3 Series - CFexpress/XQDPro Card Reader is also compatible with Macs with Thunderbolt 2 or Thunderbolt ports when used with the bi-directional Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter and a Thunderbolt cable (both sold separately).


Part Number




Form Factor

Portable card reader

Bus Interface

40Gbps Thunderbolt 3

External Connectors

Two CFexpress 2.0 Type B/XQD card slots

Two Thunderbolt 3 ports

Power port

Power Adapter

Universal 60W, 100-240V AC, 5060 Hz

Supported Media

CFexpress 2.0 Type B


Reader Dimensions(WxDxH)

5.75 x 3.5 x 1 in. (147 x 88.3 x 35.6 mm)


Reader and Power Adapter: 1.35 lbs (0.6 kg)

Complete Package: 2.10 lbs (1 kg)

RoHS Compliant


Package Contents

Sonnet SF3 Series - CFexpress/XQD Pro Card Reader

Power adapter

Power cable

0.5-meter Thunderbolt 3 cable

ThunderLok3 retainer clip



Mac Compatibility


Mac with Thunderbolt 3 ports

Mac with a Thunderbolt 2 or Thunderbolt port with an AppleThunderbolt 3 (USB C) to Thunderbolt 2 Adapter plus a Thunderbolt 2 cable (bothsold separately).

macOS 10.12.6+

macOS Catalina compatible(4)

Windows Compatibility


Computer with Thunderbolt 3 ports

Window 10 (64-bit Edition Version 1809 or greater)

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