FIELD GUIDESource-led reference
Port & Cable

P122 / Storage / Connector

CFexpress Type B card interface

CFexpress Type B shares a form factor with XQD, but a physical resemblance does not establish camera or reader support.

Also called CFexpress B CF express type B Type B camera card

Same shell is not the same supported media.

Look for

Read Type B on the card and the exact supported-media list; record the camera firmware requirement where one is given.

Claim inspection dates: 2026-10-03, 2026-10-08, 2026-10-11 · Independent review pending

CFexpress Type B card interface: three-quarter view. Computer-generated illustration, not a photograph.

Three-quarter view Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.

CFexpress Type B card interface: mating face. Computer-generated illustration, not a photograph.

Mating face Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.

CFexpress Type B card interface: fitted in place. Computer-generated illustration, not a photograph.

Fitted in place Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.

CFexpress Type B card interface: original recognition drawing, not to scale.

Recognition drawing Original schematic, not to scale. Drawing review pending.

Application notes / Camera media / P122

Does an XQD-shaped slot guarantee Type B support?

FIELD NOTES 04

No. The shared Type B/XQD form needs a separate device-support check. Sony MRW-G1 is a named reader with documented support for both the specified Type B and XQD families.

Identify first

Read the part and the device.

Record the reader model as carefully as the card label.

Still unresolved

Keep this requirement open.

A different XQD reader or camera is not approved by the MRW-G1 example.

Documented support · named example only

Are Sony CFexpress Type B and XQD G/M series listed?

Yes, those card families are explicitly listed for MRW-G1.

Boundary. Only the named reader and card families; not every XQD reader or camera.

Next check. Confirm the exact card series and the reader label.

S495 · C122D (private workspace) · C123C (private workspace)

Not established · named example only

Can the family name alone select the reader?

Unknown: determine Type A or Type B and the exact reader before choosing a path.

Boundary. No type, generation, recording mode or speed is inferred from an incomplete label.

Next check. Read the complete card and reader markings.

S096 · C121C (private workspace) · C122C (private workspace)

Before choosing an adapter or reader

  1. Identify the reader or camera model.
  2. Find its exact CFexpress Type B support statement.
  3. Keep firmware and approved card lists attached to that model.
Read the evidence and its scope · 3 observations

C122C (private workspace) — CFA describes CFexpress Type B as using two PCIe lanes and retaining the same dimensions and connector as XQD. It separately makes camera support conditional on implementation or a manufacturer update.

Card Types public text: form-factor footnote and A/B FAQ; no dimensions or speed table transcribed.

S096

C122D (private workspace) — Sony lists its CFexpress Type B memory cards for the MRW-G1 reader.

Sony MRW-G1 and the specified Sony card family only. No camera or other reader approval.

S495

C123C (private workspace) — Sony lists XQD G-series and M-series memory cards for the MRW-G1 reader.

Sony MRW-G1 and these named Sony XQD series only; a shared slot outline does not transfer this support to another reader.

S495

Source interpretation is not independent engineering review, hardware testing, wiring advice or a public-release approval.

Flagship atlas MEDIA / HOST

CFexpress B and XQD: same envelope

CFexpress Type B and XQD use the same nominal card envelope and connector, but a camera or reader must explicitly support the relevant technology and firmware. Similar form is not a firmware upgrade.

LP01 P122
Conceptual four-stage decision path: Card envelope; then Media protocol; then Camera firmware; then Reader support. Every stage requires independent verification; this is not a drawing of connector contact geometry.
Decision map, not a plug drawing or electrical wiring diagram. The original connector specimen remains above; this sequence shows what needs proof after shape identification.

Four facts to keep separate

01

Physical identity

CFA states Type B and XQD share dimensions and a connector. Evidence: C122A

02

Technology

CFA documents CFexpress Type B using a two-lane PCIe interface, separate from the older XQD technology. Evidence: C122C

03

Implementation

CFA describes camera support for the newer card as conditional on implementation or a manufacturer update. Evidence: C122A

04

Reader / workflow

Card-reader support and camera firmware must each be checked for the exact model. Evidence: C122B

Common wrong conclusion

Do not infer that every XQD-only reader will read CFexpress Type B or that Type A fits a Type B slot.

What to check next

  1. Read the exact card type and camera/reader model rather than relying on matching outline.
  2. Check the manufacturer compatibility list and any explicitly required firmware version.
  3. Match reader, cable and computer host transfer interfaces separately.
Why these statements are qualified · claim and source context

This is an original editorial decision study tied to existing source-checked claims. The following source inspections have not been renewed by this new page presentation, and none is independent engineering or model-by-model qualification.

  • S096 · CompactFlash AssociationCFexpress Form Factors; Type A versus Type B; Legacy Standards · source reviewed 2026-10-03 · CF uses PATA; CFast uses SATA; CFexpress uses PCIe/NVMe; Type B and XQD share a form factor but camera support is conditional.
  • S098 · SonyCEB-G product information; interface row · source reviewed 2026-10-03 · Sony CEB-G examples explicitly identify CFexpress Type B and PCI Express.

Unresolved: Actual device fit, required physical tolerances, pinouts, negotiations, electrical safety and hardware interoperability still require the identified manufacturer's documentation and any necessary independent review.

Flagship reference

Practical answers for CFexpress Type B card interface

Start with the answer. Follow the real distinction, then the source-scoped next check. All evidence dates and publication blockers remain unchanged.

V102Q09 Practical reference

CFexpress Type B resembles XQD. Can I use either card in a reader or camera?

Short answer Do not infer support from the similar shell. The CompactFlash Association describes a shared form factor and connector, but media acceptance remains conditional on the exact camera or reader implementation and, where applicable, manufacturer updates.

Which distinction matters?

What you are checkingWhat the cited evidence establishes
Card physical formCFA documents the shared Type B / XQD connector form factor
Card technologySony Type B product examples use their own stated interface
Camera / reader / firmwareMust expressly support the selected media family

Next checks, in order

  1. Read the camera’s exact supported card types and firmware conditions.
  2. Read the card reader’s explicit Type B or XQD support list independently.
  3. Check the reader-to-host connection path separately before inferring transfer performance.

Still unresolved: A shared connector never establishes universal firmware compatibility, cross-format decoding or guaranteed speed.

Card reader compatibility worksheet XQD and CFexpress support guide
Claim-level evidence, source locators and limits

Existing evidence claims: C122A · C122B · C122C. These are editorial field answers over inherited source records, not newly approved specifications.

  • S096 · CompactFlash Association — CFexpress Form Factors; Type A versus Type B; Legacy Standards. Recorded inspection 2026-10-03; No copied tables, logos, numeric throughput promises, exhaustive market status or licensed normative specification. Text-only scope.
  • S098 · Sony — CEB-G product information; interface row. Recorded inspection 2026-10-03; Japanese primary text inspected. Model-specific performance and dimensions are not transferred to every card.

Neither the source inspection dates nor the evidence dataset has been refreshed. No physical tests, exact-device compatibility approval, pinout or fabrication geometry is implied.

Visual reference / P122

See the envelope. Confirm the label.

Published card dimensions reveal proportion, not an approved mating drawing. Contact/key geometry is deliberately omitted.

NOMINAL / 01
CFexpress Type B: original nominal width by height envelope study, 29.6 by 38.5 mm, 3.8 mm nominal depth. Not a contact or key drawing; no host compatibility approval.
CFexpress Type B · source-supported nominal two-dimensional envelope. The outer rectangle is a size comparator only, not an exact perimeter, face layout, contact geometry or manufacturing gauge.
Nominal W × H29.6 × 38.5 mm
Nominal depth3.8 mm
Family label to checkTYPE B

What can be recognized

Larger than Type A. Same outer dimensions and connector family as XQD; the Type B label and camera/reader support remain decisive.

Compare the three independently named standards in the common-scale envelope study. The two-dimensional proportional outline excludes card corners, ramps, pins and insertion direction.

Still unverified

This exterior envelope alone cannot identify the card as Type B instead of XQD, show the connector key, or establish camera firmware support.

Never use this outline for trial insertion, mechanical design, repair, wiring or buying a reader.

Source, geometry and image-rights boundaries

First-party reference reading 9 October 2026. This is newly authored original vector artwork derived only from nominal published W/H values. It contains no borrowed logo, product image, copyrighted engineering drawing or detailed contact geometry. Manufacturer dimensions are facts, not image reuse grants. No independent engineering or rights certification is claimed.

See existing canonical evidence: S096 · S098. This visual inspection is separate from the claim review history; source review dates were not changed.

The useful distinction

Recognize it. Then verify it.

CFexpress Type B shares a form factor with XQD, but a physical resemblance does not establish camera or reader support. [C122A]

Sony labels its CEB-G card examples CFexpress Type B with a PCI Express interface. [C122B]

CFA describes CFexpress Type B as using two PCIe lanes and retaining the same dimensions and connector as XQD. It separately makes camera support conditional on implementation or a manufacturer update. [C122C]

Sony lists its CFexpress Type B memory cards for the MRW-G1 reader. [C122D]

Source-scoped identification facts

Each value retains its exact example, role and measurement axis. Facts from different parts must not be combined into an invented component.

Documented examples; not a mating drawing or compatibility approval
Dimensions / axis29.6 mm approximate overall width (CEB-G128); 38.5 mm approximate overall length (CEB-G128); 3.8 mm approximate overall thickness (CEB-G128)S098Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. CEB-G128. Documented role: card. Approximate dimensions of named CEB-G models. No XQD electrical compatibility inferred merely from shared physical form.
Connector rolecard (CEB-G128)S098Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. CEB-G128. Documented role: card. Approximate dimensions of named CEB-G models. No XQD electrical compatibility inferred merely from shared physical form.
ManufacturerSony (CEB-G128)S098Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. CEB-G128. Documented role: card. Approximate dimensions of named CEB-G models. No XQD electrical compatibility inferred merely from shared physical form.
SeriesCEB-G (CEB-G128)S098Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. CEB-G128. Documented role: card. Approximate dimensions of named CEB-G models. No XQD electrical compatibility inferred merely from shared physical form.
Exact part / implementationCEB-G128 (CEB-G128)S098Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. CEB-G128. Documented role: card. Approximate dimensions of named CEB-G models. No XQD electrical compatibility inferred merely from shared physical form.

Not recorded: Nominal contacts, Positions / cavity span, Populated contacts, Contact rows, Contact pitch, Contact gender / arrangement, Mounting, Coupling / latch, Keying / polarization, Shell / form, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Recorded variant and source limits
  • A camera update does not update a card reader. Check exact card, reader, capacity and recording-mode documentation separately.
  • No independently reviewed card dimensions, contact count, contact assignments or tolerance drawing are published in this profile.
  • A bus generation, lane count, VPG class or connector shape is not measured performance or a complete compatibility verdict.
Report a correction to these facts →

Bounded facts, visible unknowns

Specifications and limits

CFexpress Type B card interface facts and limitations
Documented identificationThe CompactFlash Association states that Type B and XQD share a form factor and connector, with camera support conditional on implementation. [C122A]
Important distinctionSony labels its CEB-G card examples CFexpress Type B with a PCI Express interface. [C122B]
Documented distinctionCFA describes CFexpress Type B as using two PCIe lanes and retaining the same dimensions and connector as XQD. It separately makes camera support conditional on implementation or a manufacturer update. [C122C]
Mechanical dimensionsNo independently approved mechanical dimensions. Do not use this record for fabrication or fit testing.
Engineering pinoutSource-checked engineering profile available; independent review pending. Open engineering profile →
Verified device listNot included. Check exact device and accessory documentation.
A boundary, not an omission to guess around.

Record the exact device model and the label beside the port. Obtain its manual and the accessory documentation. Keep unknown properties unknown instead of filling them from a visually similar item.

Before you connect

What to check

  1. Distinguish Type B from Type A.
  2. Confirm CFexpress support rather than assuming XQD support is sufficient.
  3. Check camera firmware and card-reader support separately.
Trace a supported connection class →

What is not established

This field note does not approve a connection, publish a pinout or provide a measured template. Use the linked source scope and the checklist as a documentation starting point.

Your next step

Move from the form to the requirement.

Read the engineering reference Source-scoped details, orientation and explicit unknowns.Work through a connection Choose your task before deciding on a cable.Explore this evidence trail Inspect the claims and their dependencies. (private workspace)

The source trail

Evidence for this page

AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.

Back to first citation ↑
C122ASource checked · pending review

The CompactFlash Association states that Type B and XQD share a form factor and connector, with camera support conditional on implementation.

CompactFlash Association · Card types and form-factor distinctions ↗

Locator: CFexpress Form Factors; Type A versus Type B; Legacy Standards
Access: public page. No copied tables, logos, numeric throughput promises, exhaustive market status or licensed normative specification. Text-only scope.

S096: full source recordInspect review dependencies → (private workspace)

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval. Next review due 2027-01-01.

Back to first citation ↑
C122BSource checked · pending review

Sony labels its CEB-G card examples CFexpress Type B with a PCI Express interface.

Sony · CFexpress Type B CEB-G support — interface identity ↗

Locator: CEB-G product information; interface row
Access: public page. Japanese primary text inspected. Model-specific performance and dimensions are not transferred to every card.

S098: full source recordInspect review dependencies → (private workspace)

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval. Next review due 2027-01-01.

Back to first citation ↑
C122CSource checked · pending review

CFA describes CFexpress Type B as using two PCIe lanes and retaining the same dimensions and connector as XQD. It separately makes camera support conditional on implementation or a manufacturer update.

CompactFlash Association · Card types and form-factor distinctions ↗

Locator: CFexpress Form Factors; Type A versus Type B; Legacy Standards
Access: public page. No copied tables, logos, numeric throughput promises, exhaustive market status or licensed normative specification. Text-only scope.

S096: full source recordInspect review dependencies → (private workspace)

Claim scope: Card Types public text: form-factor footnote and A/B FAQ; no dimensions or speed table transcribed.. Next review due 2027-01-06.

Back to first citation ↑
C122DSource checked · pending review

Sony lists its CFexpress Type B memory cards for the MRW-G1 reader.

Sony · MRW-G1 CFexpress Type B / XQD reader supported cards ↗

Locator: Product description and FAQ: supported Sony CFexpress Type B and Sony XQD G/M series cards.
Access: public page. Named example only. No universal compatibility or publication approval. Raw-byte acquisition status is recorded separately.

S495: full source recordInspect review dependencies → (private workspace)

Claim scope: Sony MRW-G1 and the specified Sony card family only. No camera or other reader approval.. Next review due 2027-01-09.

Suggest a correction to this field note →

Common questions

Questions this record can help resolve

Is CFexpress Type A or B the same as its generation?Separate the physical type, specification generation, protocol and exact equipment support.Does an XQD slot automatically support CFexpress Type B?Use an exact firmware example without extending it to every camera or reader.What do UDMA, UHS and USB mean on a multi-card reader?Keep each card slot’s interface separate from the computer connection.Is VPG the same as a card’s read speed or USB speed?Check sustained-write profile requirements separately from offload claims.

Take this family into a reader workflow.

See documented support, explicit exclusions and remaining unknowns for exact readers.

Explore reader coverage →Start an unsaved worksheet

Put this field note to work.

Add to discovery trayRecord an unsaved candidate (private workspace)

Compare look-alikes: CFexpress Type A versus Type B · XQD versus CFexpress Type B

Candidate selection does not confirm the identity or capabilities of your physical item.

Use this reference

From identity to the right next question

Evidence behind this page

Scope first. Source second. Approval separate.

3 linked sources · 4 scoped claims · 0 sources with inspection/access flags.

Page scope: consumer_reference_expansion

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 3 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

S098 · CFexpress Type B CEB-G support — interface identity

Sony · Manufacturer / product-owner domain · inspected 2026-10-03 · due 2027-01-01

Within inspection window

Scoped support: Sony CEB-G examples explicitly identify CFexpress Type B and PCI Express.

Not established / limitations: Japanese primary text inspected. Model-specific performance and dimensions are not transferred to every card.

Locator: CEB-G product information; interface row

S495 · MRW-G1 CFexpress Type B / XQD reader supported cards

Sony · Unclassified publisher domain · inspected 2026-10-11 · due 2027-01-09

Within inspection window

Scoped support: Named reader support only, not all XQD readers, all camera slots or all brands.

Not established / limitations: Named example only. No universal compatibility or publication approval. Raw-byte acquisition status is recorded separately.

Locator: Product description and FAQ: supported Sony CFexpress Type B and Sony XQD G/M series cards.

Trace 4 claims to their source records

C122A · P122

The CompactFlash Association states that Type B and XQD share a form factor and connector, with camera support conditional on implementation.

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

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

C122B · P122

Sony labels its CEB-G card examples CFexpress Type B with a PCI Express interface.

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

Source links: S098 · Evidence trail → (private workspace)

C122C · P122

CFA describes CFexpress Type B as using two PCIe lanes and retaining the same dimensions and connector as XQD. It separately makes camera support conditional on implementation or a manufacturer update.

Claim scope: Card Types public text: form-factor footnote and A/B FAQ; no dimensions or speed table transcribed.

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

C122D · P122

Sony lists its CFexpress Type B memory cards for the MRW-G1 reader.

Claim scope: Sony MRW-G1 and the specified Sony card family only. No camera or other reader approval.

Source links: S495 · 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.