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Sonnet SF3 Series

Home Video Equipment 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.
Mac & Win
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SF3 Series -CFexpress/XQD Pro Card Reader

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


Superior IngestPerformance

Whether you’re capturing 4K at 60P RAW video footage toCFexpress™ memory cards, or shooting hundreds of photos in a session and savingthem to XQD™ memory cards, the generated files are huge, and the cards fill upfast. Moving those files to your computer for editing is a must, but if you usethe 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 finishingthe 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 tworeaders side-by-side on a rack tray in just 1U of rack space.


40Gbps Thunderbolt™ 3Interface

Fastest interface available; offers 2750 MB/s of PCIebandwidth.


Two Thunderbolt 3Ports

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


Backward Compatible

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


Mac & WindowsCompatible

Supports Mac and Windows computers.


Cut Ingest Times byup to Half

Dual Card Slots, Less Waiting

The SF3 Series - CFexpress/XQD Pro Card Reader isultra-fast, able to ingest files from CFexpress and XQD cards at their maximumspeeds. Better still, it can ingest files simultaneously from two CFexpresscards—at more than double the average ingest speed of other CFexpress or XQDcard 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 racktray in just 1U of rack space.


Fastest ExternalInterface Available

Thunderbolt 3 - The USB-C That Does It All


Featuring a dual-port 40Gbps Thunderbolt 3 interface, thisprofessional reader ingests footage from CFexpress 2.0 Type B or XQD memorycards to any Mac® or Windows® computer with Thunderbolt 3 ports—on location, inthe 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 twoThunderbolt 3 ports; the first one used for connecting to your computer, whilethe second supports daisy chaining of up to five additional Thunderboltperipheral 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, meaningyou can connect a USB device to the second port using the proper cable oradapter.


Supports Two 4K orOne 5K Display

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


Provides 15W of Power

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


Included at No ExtraCharge Thunderbolt 3 Cable. ThunderLok 3.

Sonnet includes a 0.5-meter Thunderbolt 3 (40Gbps) cablethat, 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) thatprevents accidental cable disconnections—just slide it over one end of thecable, and then plug in the connector and secure it to the chassis by turning athumbscrew. Because of its unique design, ThunderLok remains on the cable so itwon’t get lost when not in use.


Backward Compatiblewith Older Macs

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

Part No. 
SF3-2RMMSF3 Series - RED MINI-MAG Pro Card Reader
Technical SupportLifetime
Form FactorPortable card reader
Bus Interface40Gbps Thunderbolt 3
External Connector
  • Two RED MINI-MAG slots
  • Two Thunderbolt 3 ports
  • Power port
Power AdapterUniversal 60W, 100-240V AC, 50-60 Hz
Supported MediaRED MINI-MAG
Package Dimensions (WxDxH)9.2 x 6.8 x 3.5 in (233 x 173 x 89 mm)
Reader Dimensions (WxDxH)5.75 x 6.1 x 1.4 in. (145 x 155 x 36 mm)
RoHS CompliantYes
Mounting Instructions
Package Contents
  • Sonnet SF3 Series - RED MINI-MAG Pro Card Reader
  • Power adapter
  • Region-specific Power cable for US, Australia, Europe, Japan, or Switzerland
  • 0.5-meter Thunderbolt 3 cable
  • ThunderLok 3 Thunderbolt Connector Retainer Clip
  • Documentation


Specifications subject to change without notice.



Mac Compatibility

Mac with Thunderbolt 3 ports

Mac with a Thunderbolt 2 or Thunderbolt port with an Apple Thunderbolt 3 (USB C) to Thunderbolt 2 Adapter plus Thunderbolt cable (both sold separately)

macOS 10.12.6+

macOS Mojave compatible

Windows Compatibility

Computer with Thunderbolt 3 ports

Windows 10 (64-bit Edition Version 1903 or greater)

Linux Compatibility

Linux computer with Thunderbolt 3 ports

Linux Kernel 5.0+

Technical Notes

  1. One 4K monitor directly supported. Two 4K monitors requires either a 4K monitor with multi-stream transport support (DP out), or a Thunderbolt 3 to Dual DisplayPort. 5K monitor requires a Thunderbolt 3 to Dual DisplayPortadapter.
  2. ThunderLok 3 compatible specifically with Sonnet 0.5- and 0.7-meter Thunderbolt 3 cables; Sonnet 1- and 2-meter Thunderbolt 3 cables require ThunderLok 3L.



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