FIELD GUIDESource-led reference
Port & Cable

E121 · No electrical assignment published

CFexpress Type A card interface engineering reference

The Type A form uses one PCIe lane in the cited CFA explanation. Version, NVMe context and a named reader’s supported cards remain separate layers.

Open field noteSource trail

Source checked · no independent review claimed · Fabrication approved: no

CFexpress Type A: original nominal width by height envelope study, 20 by 28 mm, 2.8 mm nominal depth. Not a contact or key drawing; no host compatibility approval.
View nominal front-face envelope, no connector edgeW × H 20 × 28 mmThickness 2.8 mm, reported separatelyOriginal proportional study · not a fitting template · independent review pending
Identification schematic only · not to scale · drawing review pending. No engineering drawing is published for this profile.

Orientation

How to read this profile

Existing identification-only schematic. No mating-face numbering, pin-side transformation or mechanical template is supplied.

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 / axis20 mm overall width (CEA-G160T); 28 mm overall height (CEA-G160T); 2.8 mm overall depth (CEA-G160T)S922Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. CEA-G160T. Documented role: card. Existing S438 is MRW-G2 reader manual5-019-283-B1(1)(2020), not a CFexpress card mechanical drawing. Reader47x18mm dimensions must not enrich the card.; Other CEA-G capacities use different interface generations; no uniform capability transferred.
Connector rolecard (CEA-G160T)S922Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. CEA-G160T. Documented role: card. Existing S438 is MRW-G2 reader manual5-019-283-B1(1)(2020), not a CFexpress card mechanical drawing. Reader47x18mm dimensions must not enrich the card.; Other CEA-G capacities use different interface generations; no uniform capability transferred.
ManufacturerSony (CEA-G160T)S922Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. CEA-G160T. Documented role: card. Existing S438 is MRW-G2 reader manual5-019-283-B1(1)(2020), not a CFexpress card mechanical drawing. Reader47x18mm dimensions must not enrich the card.; Other CEA-G capacities use different interface generations; no uniform capability transferred.
SeriesCEA-G (CEA-G160T)S922Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. CEA-G160T. Documented role: card. Existing S438 is MRW-G2 reader manual5-019-283-B1(1)(2020), not a CFexpress card mechanical drawing. Reader47x18mm dimensions must not enrich the card.; Other CEA-G capacities use different interface generations; no uniform capability transferred.
Exact part / implementationCEA-G160T (CEA-G160T)S922Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. CEA-G160T. Documented role: card. Existing S438 is MRW-G2 reader manual5-019-283-B1(1)(2020), not a CFexpress card mechanical drawing. Reader47x18mm dimensions must not enrich the card.; Other CEA-G capacities use different interface generations; no uniform capability transferred.

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
  • MRW-G2 is a bounded shared-slot example, not evidence for every Type A reader, every brand of card, or a Type B adapter.
  • 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 →

Unknowns stay unknown.

  • MRW-G2 is a bounded shared-slot example, not evidence for every Type A reader, every brand of card, or a Type B adapter.
  • 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.

Your next step

Use the detail without guessing past its limits.

Read the connector field note Recognition clues and practical checks.Work through a connection Keep exact equipment and cable requirements separate.

Source trail

Claims and sources

C121Asource checked

The CompactFlash Association distinguishes the smaller Type A form from Type B.

CompactFlash Association · Card types and form-factor distinctions ↗
CFexpress Form Factors; Type A versus Type B; Legacy Standards · No copied tables, logos, numeric throughput promises, exhaustive market status or licensed normative specification. Text-only scope.

C121Csource checked

CFA describes CFexpress Type A as the smaller A/B form using one PCIe lane. The A/B type letter identifies a form factor; the separately described version-4 marking identifies a specification generation.

CompactFlash Association · Card types and form-factor distinctions ↗
CFexpress Form Factors; Type A versus Type B; Legacy Standards · No copied tables, logos, numeric throughput promises, exhaustive market status or licensed normative specification. Text-only scope.

C121Dsource checked

Sony’s MRW-G2 instructions list Sony CFexpress Type A and the stated Sony SD families, while explicitly withholding a guarantee for every memory-card type. This is named-reader scope, not support for CFexpress Type B or for all cards.

Sony · MRW-G2 Operating Instructions — 5-019-283-B1 (1) ↗
PDF page 1, English compatible cards, precautions, specifications and illustrations A–C; printed identifier 5-019-283-B1 (1). · All cards and computers are not guaranteed. Drawing interpreted for this reader only; no manufacturer artwork copied, no card geometry or current OS certification adopted.

2 source records support this profile. No independent engineering review or hardware validation is claimed.

Evidence behind this page

Scope first. Source second. Approval separate.

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

Page scope: No V81 engineering drawing added. The inherited recognition illustration is unnumbered and not to scale.

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 2 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

S438 · MRW-G2 Operating Instructions — 5-019-283-B1 (1)

Sony · Unclassified publisher domain · inspected 2026-10-08 · due 2027-01-06

Within inspection window

Scoped support: MRW-G2 shared-slot alternatives, Sony card-family wording, USB interface and supplied-cable limitations.

Not established / limitations: All cards and computers are not guaranteed. Drawing interpreted for this reader only; no manufacturer artwork copied, no card geometry or current OS certification adopted.

Locator: PDF page 1, English compatible cards, precautions, specifications and illustrations A–C; printed identifier 5-019-283-B1 (1).

Trace 4 claims to their source records

C121A · P121

The CompactFlash Association distinguishes the smaller Type A form from Type B.

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

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

C121B · P121

CFexpress uses PCI Express with NVMe protocols.

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

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

C121C · P121

CFA describes CFexpress Type A as the smaller A/B form using one PCIe lane. The A/B type letter identifies a form factor; the separately described version-4 marking identifies a specification generation.

Claim scope: Card Types public text: Type A versus Type B and label FAQ; reinspected 2026-10-08 without changing the inherited source record.

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

C121D · P121

Sony’s MRW-G2 instructions list Sony CFexpress Type A and the stated Sony SD families, while explicitly withholding a guarantee for every memory-card type. This is named-reader scope, not support for CFexpress Type B or for all cards.

Claim scope: Printed 5-019-283-B1 (1), PDF page 1 English Compatible memory cards.

Source links: S438 · 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.