FIELD GUIDESource-led reference

Side by side

CompactFlash versus CFast

Similar names refer to different card families.

Computer-generated illustration, not a photograph.
P119 · ConnectorCompactFlash Type I card interface
Computer-generated illustration, not a photograph.
P120 · ConnectorCFast card interface

How they differ

  • CompactFlash Type I card interface Read the full card label, including Type I where documented, and compare the recessed contact end with the reader specification.
  • CFast card interface Read CFast on the card and confirm the same family in the camera and reader manuals. Avoid identifying a slot by width alone.

At a glance

Source-scoped form facts; counts, variants and unknowns are distinct
FieldCompactFlash Type I card interfaceCFast card interface
TypeConnectorConnector
FamilyStorageStorage
Shapecard edgecard edge
Nominal contacts50S847Fifty-contact interface; recessed contacts may not be visible without a manufacturer illustration.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Positions / cavity spanNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Contact rowsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.1 (3M N7G24-A0B2RA-00-0HT)S985Current primary-source scoped values; named examples remain separate and unknowns are not inferred from illustrations. Exact 3M N7G24-A0B2RA-00-0HT CFast host plug for Type I/II cards; explicit Number of Contact Rows property only. Quantity context: Manufacturer Number of Contact Rows.
Connector rolecard (TS32GCF800)S920Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. TS32GCF800. Documented role: card. Actual full official2page PDF captured and hashed. Dimensions tuple is explicit, but table does not name width/length axes.; CFA legacy mechanical specifications require non-member purchase; no purchase attempted and no extra pitch/key geometry invented.card (TS32GCFX722I)S921Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. TS32GCFX722I. Documented role: card. Exact CFX722I card family, not CFexpress or CompactFlash despite similar outer envelope.; Current full official PDF captured; filename202404 is not asserted as an internal publication date. No contact pitch inferred.
Key distinctionThe word Compact does not identify a card interface.CFast is not an abbreviated name for CFexpress.

Full evidence ledger and sources ↓

Illustrations are computer-generated with prior AI visual review; independent technical and rights review pending. A comparison is not a compatibility verdict.

This comparison stays within one evidence layer.

All selected records are Connector records. Similar layer does not mean compatible, interchangeable or safe to mate.

Families represented: Storage

Application comparison / concept only

CompactFlash is not a catch-all name

Do not shorten away the interface distinction.

CompactFlash is not a catch-all name. A CompactFlash reader listing alone does not establish CFast support.
A CompactFlash reader listing alone does not establish CFast support. Concept only; not physical interface geometry.

Not a general compatibility verdict. S096 · S439 · S440

The reference ledger

Read the same question across.

2 selected records · 15 fields
No score. No compatibility verdict.

On a narrow screen, scroll the table sideways or open the field-by-field reading view below. Illustrations are not a size comparison.

Comparison of selected field notes; source links accompany each documented specification
What you are comparing
CompactFlash Type I card interface — label-led card symbol; card symbol; interface face not shown; label-led symbol, not interface geometry; original, not-to-scale identification schematic; drawing review pending
P119 / ConnectorCompactFlash Type I card interface

Identification schematic · not to scale · drawing review pending

CFast card interface — label-led card symbol; card symbol; interface face not shown; label-led symbol, not interface geometry; original, not-to-scale identification schematic; drawing review pending
P120 / ConnectorCFast card interface

Identification schematic · not to scale · drawing review pending

LayerConnectorConnector
Key distinctionThe word Compact does not identify a card interface.CFast is not an abbreviated name for CFexpress.
Nominal contacts50S847Fifty-contact interface; recessed contacts may not be visible without a manufacturer illustration.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Positions / cavity spanNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Populated contactsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Contact rowsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.1 (3M N7G24-A0B2RA-00-0HT)S985Current primary-source scoped values; named examples remain separate and unknowns are not inferred from illustrations. Exact 3M N7G24-A0B2RA-00-0HT CFast host plug for Type I/II cards; explicit Number of Contact Rows property only. Quantity context: Manufacturer Number of Contact Rows.
Contact pitchNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Dimensions / axisNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.42.8 ± 0.1 mm overall horizontal span in published broad-face drawing (TS32GCFX722I); 36.4 ± 0.15 mm overall vertical span in published broad-face drawing (TS32GCFX722I); 3.3 ± 0.1 mm overall thickness in published side view (TS32GCFX722I)S921Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. TS32GCFX722I. Documented role: card. Exact CFX722I card family, not CFexpress or CompactFlash despite similar outer envelope.; Current full official PDF captured; filename202404 is not asserted as an internal publication date. No contact pitch inferred.
Connector rolecard (TS32GCF800)S920Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. TS32GCF800. Documented role: card. Actual full official2page PDF captured and hashed. Dimensions tuple is explicit, but table does not name width/length axes.; CFA legacy mechanical specifications require non-member purchase; no purchase attempted and no extra pitch/key geometry invented.card (TS32GCFX722I)S921Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. TS32GCFX722I. Documented role: card. Exact CFX722I card family, not CFexpress or CompactFlash despite similar outer envelope.; Current full official PDF captured; filename202404 is not asserted as an internal publication date. No contact pitch inferred.
Coupling / latchNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Keying / polarizationNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Documented identificationTranscend describes a 50-pin CompactFlash card and explicitly lists Type I support.C119AThe CompactFlash Association identifies CFast as a Serial ATA card family.C120A
Important distinctionThe CompactFlash Association identifies CompactFlash with the PATA interface.C119BThe same association lists CompactFlash and CFexpress as separate card standards.C120B
Documented distinctionThe RDF8 sheets list CompactFlash UDMA7 separately from SD and microSD UHS-I. The named TS-RDF8K2 / TS-RDF8W2 reader examples do not establish CFast or CFexpress support.C119CNot an equivalent field
EvidenceC119A,C119B,C119C →
Independent review pending
C120A,C120B,C120C,C120W →
Independent review pending
Read field by field — no sideways scrolling

The same selected records, fields, values and source links as the table. Missing fields remain non-equivalent; no values are merged.

Layer

CompactFlash Type I card interfaceP119 / Connector
Connector
CFast card interfaceP120 / Connector
Connector

Key distinction

CompactFlash Type I card interfaceP119 / Connector
The word Compact does not identify a card interface.
CFast card interfaceP120 / Connector
CFast is not an abbreviated name for CFexpress.

Nominal contacts

CompactFlash Type I card interfaceP119 / Connector
50S847Fifty-contact interface; recessed contacts may not be visible without a manufacturer illustration.
CFast card interfaceP120 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Positions / cavity span

CompactFlash Type I card interfaceP119 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
CFast card interfaceP120 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Populated contacts

CompactFlash Type I card interfaceP119 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
CFast card interfaceP120 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact rows

CompactFlash Type I card interfaceP119 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
CFast card interfaceP120 / Connector
1 (3M N7G24-A0B2RA-00-0HT)S985Current primary-source scoped values; named examples remain separate and unknowns are not inferred from illustrations. Exact 3M N7G24-A0B2RA-00-0HT CFast host plug for Type I/II cards; explicit Number of Contact Rows property only. Quantity context: Manufacturer Number of Contact Rows.

Contact pitch

CompactFlash Type I card interfaceP119 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
CFast card interfaceP120 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Dimensions / axis

CompactFlash Type I card interfaceP119 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
CFast card interfaceP120 / Connector
42.8 ± 0.1 mm overall horizontal span in published broad-face drawing (TS32GCFX722I); 36.4 ± 0.15 mm overall vertical span in published broad-face drawing (TS32GCFX722I); 3.3 ± 0.1 mm overall thickness in published side view (TS32GCFX722I)S921Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. TS32GCFX722I. Documented role: card. Exact CFX722I card family, not CFexpress or CompactFlash despite similar outer envelope.; Current full official PDF captured; filename202404 is not asserted as an internal publication date. No contact pitch inferred.

Connector role

CompactFlash Type I card interfaceP119 / Connector
card (TS32GCF800)S920Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. TS32GCF800. Documented role: card. Actual full official2page PDF captured and hashed. Dimensions tuple is explicit, but table does not name width/length axes.; CFA legacy mechanical specifications require non-member purchase; no purchase attempted and no extra pitch/key geometry invented.
CFast card interfaceP120 / Connector
card (TS32GCFX722I)S921Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. TS32GCFX722I. Documented role: card. Exact CFX722I card family, not CFexpress or CompactFlash despite similar outer envelope.; Current full official PDF captured; filename202404 is not asserted as an internal publication date. No contact pitch inferred.

Coupling / latch

CompactFlash Type I card interfaceP119 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
CFast card interfaceP120 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Keying / polarization

CompactFlash Type I card interfaceP119 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
CFast card interfaceP120 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Documented identification

CompactFlash Type I card interfaceP119 / Connector
Transcend describes a 50-pin CompactFlash card and explicitly lists Type I support.C119A
CFast card interfaceP120 / Connector
The CompactFlash Association identifies CFast as a Serial ATA card family.C120A

Important distinction

CompactFlash Type I card interfaceP119 / Connector
The CompactFlash Association identifies CompactFlash with the PATA interface.C119B
CFast card interfaceP120 / Connector
The same association lists CompactFlash and CFexpress as separate card standards.C120B

Documented distinction

CompactFlash Type I card interfaceP119 / Connector
The RDF8 sheets list CompactFlash UDMA7 separately from SD and microSD UHS-I. The named TS-RDF8K2 / TS-RDF8W2 reader examples do not establish CFast or CFexpress support.C119C
CFast card interfaceP120 / Connector
Not an equivalent field

Evidence

CompactFlash Type I card interfaceP119 / Connector
C119A,C119B,C119C →
Independent review pending
CFast card interfaceP120 / Connector
C120A,C120B,C120C,C120W →
Independent review pending

Your next step

Use the distinction in context.

Continue the distinction

Compare next

Browse every comparison →

Adjust this comparison

Evidence behind this page

Scope first. Source second. Approval separate.

6 linked sources · 7 scoped claims · 0 sources with inspection/access flags.

Page scope: Evidence behind the compared records; the editorial comparison still needs separate review.

Assessment 2026-10-22 · earliest scheduled source review 2027-01-01. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 6 source scopes, access limits and dates

S096 · Card types and form-factor distinctions

CompactFlash Association · Standards-organization domain · inspected 2026-10-03 · due 2027-01-01

Within inspection window

Scoped support: CF uses PATA; CFast uses SATA; CFexpress uses PCIe/NVMe; Type B and XQD share a form factor but camera support is conditional.

Not established / limitations: No copied tables, logos, numeric throughput promises, exhaustive market status or licensed normative specification. Text-only scope.

Locator: CFexpress Form Factors; Type A versus Type B; Legacy Standards

S439 · RDF8 product sheet — Transcend-RDF8.pdf

Transcend · Manufacturer / product-owner domain · inspected 2026-10-08 · due 2027-01-06

Within inspection window

Scoped support: TS-RDF8K2 / TS-RDF8W2 selected media slots, CompactFlash UDMA7, SD/microSD UHS-I, USB 3.1 Gen 1 description.

Not established / limitations: Concurrent-operation wording is compared with S440 and remains unresolved. Document age or hardware revision is not inferred from a filename. No measured aggregate transfer, exact-card or OS certification.

Locator: PDF pages 1–2 visually inspected; card slots, Compatibility, Performance, Ordering Information and three-card insertion wording. No printed revision identifier.

S440 · RDF8 product sheet — EN_RDF8_PS_1905.pdf

Transcend · Manufacturer / product-owner domain · inspected 2026-10-08 · due 2027-01-06

Within inspection window

Scoped support: TS-RDF8K2 / TS-RDF8W2 UHS-II cards at UHS-I speeds and contradictory simultaneous-insertion wording.

Not established / limitations: Page 1 allows two-card insertion while page 2 says it is unsupported. Kept as an unresolved documentation conflict, not a chosen device capability. Filename is not treated as a verified revision date.

Locator: PDF pages 1–2 visually inspected: page 1 Additional Features, page 2 Operating Environment Note and Compatibility. Page 3 multi-product comparison not adopted.

S641 · FAQs About the Industrial CFast Card — interface distinction

Delkin Devices · Unclassified publisher domain · inspected 2026-10-14 · due 2027-01-12

Within inspection window

Scoped support: Manufacturer explanation identifying a 24-pin SATA connector/interface for industrial CFast.

Not established / limitations: Only interface/contact-count distinction adopted. No precise dimensions, universal flash technology, uptime, security, speed or card/device compatibility claims adopted.

Locator: Article dated 2022-05-06; What is the difference between CF and CFast?

S847 · PCMCIA CompactFlash Adapter TS0MCF2PC

Transcend Information, Inc. · Manufacturer / product-owner domain · inspected 2026-10-21 · due 2027-01-19

Within inspection window

Scoped support: The full manufacturer product page explicitly states the50-pin CompactFlash card interface and TypeI support for this adapter.

Not established / limitations: Adapter's documented support only; no arbitrary device/OS/slot approval, card pinout, measured tolerance, or broad compatibility guarantee. Product photos and certification marks were not copied.

Locator: Key Features:50-pin CompactFlash to68-pin PCMCIA and TypeI; Compatibility: CompactFlash(TypeI); Order Information:TS0MCF2PC.

S985 · 3M CFast connector N7G24-A0B2RA-00-0HT specification

3M · Unclassified publisher domain · inspected 2026-10-22 · due 2027-01-20

Within inspection window

Scoped support: ExactN7G24-A0B2RA-00-0HT host plug contact-row property only.

Not established / limitations: Contact rows is the explicit manufacturer property; PCB tail description kept separate. No pitch transferred from Kingconn or other3M part; TypeI/II host acceptance is not a CFast-to-CF compatibility approval.

Locator: Full exact part page: NumberofContacts24,ConnectorStylePlug,Number of Contact Rows1,CardTypeI/II. TS2329 technicalPDF link retrieved as text-reference only; direct acquisition403, no drawing pixels claimed.

Trace 7 claims to their source records

C119A · P119

Transcend describes a 50-pin CompactFlash card and explicitly lists Type I support.

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval

Source links: S847 · Evidence trail → (private workspace)

C119B · P119

The CompactFlash Association identifies CompactFlash with the PATA interface.

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval

Source links: S096 · Evidence trail → (private workspace)

C119C · P119

The RDF8 sheets list CompactFlash UDMA7 separately from SD and microSD UHS-I. The named TS-RDF8K2 / TS-RDF8W2 reader examples do not establish CFast or CFexpress support.

Claim scope: Both sheets PDF page 2 Compatibility and Ordering Information; no Type I/II thickness or electrical assignment adopted.

Source links: S439 · S440 · Evidence trail → (private workspace)

C120A · P120

The CompactFlash Association identifies CFast as a Serial ATA card family.

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval

Source links: S096 · Evidence trail → (private workspace)

C120B · P120

The same association lists CompactFlash and CFexpress as separate card standards.

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval

Source links: S096 · Evidence trail → (private workspace)

C120C · P120

Delkin identifies a 24-pin SATA connector and SATA interface as a distinction of its industrial CFast description.

Claim scope: Manufacturer interface-identification passage only. No pin assignment, exact mating dimensions or card-reader support inferred.

Source links: S641 · Evidence trail → (private workspace)

C120W · P120

3M specifies N7G24-A0B2RA-00-0HT as a 24-contact CFast host plug with one contact row. The source separately describes its single-row SMT solder tails.

Claim scope: Exact 3M N7G24-A0B2RA-00-0HT CFast host plug for Type I/II cards; explicit Number of Contact Rows property only.

Source links: S985 · Evidence trail → (private workspace)

Prepare this page for review → (private workspace)Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.