E293 · Contact count only

SFF-TA-1002 4C 140-contact connector engineering reference

SNIA REF-TA-1012 Rev 1.0 documents this variation with 140 contacts and up to 44 differential data pairs using GSSGSSG structure; the same reference shows alternate assignment contexts rather than one universal logical map.

Open field note Source trail

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

SFF-TA-1002 4C 140-contact connector engineering boundary original orientation schematic — Original V51 engineering boundary schematic; not to scale and not a logical pinout, mating gauge or manufacturing drawing.

Contact count

140

SFF-TA-1002 card-edge connector variation

Mating boundary

Shape is not the verdict.

SFF-TA-1002 device/card edge ↔ matching receptacle implemented for the same platform and assignment context

Orientation

How to read this profile

V51 records the keyed card-edge/contact-count context only. Assignment side, lane, power and sideband roles must be resolved from the applicable platform specification; no universal pin map is reproduced.

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
Nominal contacts	140S334Source-backed nominal position/contact count for identification: 140. Not a pinout or manufacturing drawing.
Contact rows	2S912Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. Rev1.6a 4C straight fixed receptacle; not right-angle/straddle variants. Documented role: socket. Standard drawing limits, not a measured specimen or exact manufacturer part.; A1 indicator shape is not transcribed as literal lettering. Manufacturer logo/series/part markings remain unknown.; Preserve existing application pinout records; mechanical drawing does not establish electrical usage.
Contact pitch	0.6 mm longitudinal adjacent mating contact/pad centersS912Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. Rev1.6a 4C straight fixed receptacle; not right-angle/straddle variants. Documented role: socket. Standard drawing limits, not a measured specimen or exact manufacturer part.; A1 indicator shape is not transcribed as literal lettering. Manufacturer logo/series/part markings remain unknown.; Preserve existing application pinout records; mechanical drawing does not establish electrical usage.
Dimensions / axis	57.17 mm maximum overall longitudinal span; 6.15 mm maximum transverse body depth; 9.25 mm maximum height from SMT lead plane to housing topS912 · S912Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. Rev1.6a 4C straight fixed receptacle; not right-angle/straddle variants. Documented role: socket. Standard drawing limits, not a measured specimen or exact manufacturer part.; A1 indicator shape is not transcribed as literal lettering. Manufacturer logo/series/part markings remain unknown.; Preserve existing application pinout records; mechanical drawing does not establish electrical usage.
Connector role	card-edge; socketS334 · S356 · S912Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. SFF-TA-1002 card-edge connector variation Rev1.6a 4C straight fixed receptacle; not right-angle/straddle variants. Documented role: socket. Standard drawing limits, not a measured specimen or exact manufacturer part.; A1 indicator shape is not transcribed as literal lettering. Manufacturer logo/series/part markings remain unknown.; Preserve existing application pinout records; mechanical drawing does not establish electrical usage.
Keying / polarization	Unequal divider keys prevent reversed mating; p.74FigB-3S912Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. Rev1.6a 4C straight fixed receptacle; not right-angle/straddle variants. Documented role: socket. Standard drawing limits, not a measured specimen or exact manufacturer part.; A1 indicator shape is not transcribed as literal lettering. Manufacturer logo/series/part markings remain unknown.; Preserve existing application pinout records; mechanical drawing does not establish electrical usage.
Recorded markings	Position A1 identification mark required by drawingS912Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. Rev1.6a 4C straight fixed receptacle; not right-angle/straddle variants. Documented role: socket. Standard drawing limits, not a measured specimen or exact manufacturer part.; A1 indicator shape is not transcribed as literal lettering. Manufacturer logo/series/part markings remain unknown.; Preserve existing application pinout records; mechanical drawing does not establish electrical usage.
View convention	Mating-face view: B row above A row; position1 at right in the published straight-receptacle drawing.S912Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. Rev1.6a 4C straight fixed receptacle; not right-angle/straddle variants. Documented role: socket. Standard drawing limits, not a measured specimen or exact manufacturer part.; A1 indicator shape is not transcribed as literal lettering. Manufacturer logo/series/part markings remain unknown.; Preserve existing application pinout records; mechanical drawing does not establish electrical usage.

Not recorded: Positions / cavity span, Populated contacts, Contact gender / arrangement, Mounting, Coupling / latch, Shell / form, Manufacturer, Series, Exact part / implementation. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Recorded variant and source limits

EDSFF, OCP, Gen-Z and other implementation contexts can use different logical assignments over related connector variations.
Connector variation and pair capacity do not establish active lane count, protocol generation, power delivery, sideband wiring, host support or fabrication dimensions.

Report a correction to these facts →

Unknowns stay unknown.

EDSFF, OCP, Gen-Z and other implementation contexts can use different logical assignments over related connector variations.
Connector variation and pair capacity do not establish active lane count, protocol generation, power delivery, sideband wiring, host support or fabrication dimensions.

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

C293Asource checked

SNIA REF-TA-1012 identifies the SFF-TA-1002 4C connector variation as a 140-contact connector with up to 44 differential pairs of data signals.

SNIA · SNIA REF-TA-1012 SFF-TA-1002 connector variations — 4C ↗
Section 3.1 overview, 4C connector variation · Source-backed identification does not establish universal wiring, protocol generation, device compatibility, safe installation or fabrication approval.

C293Bsource checked

SNIA’s published reference describes the SFF-TA-1002 4C variation as 140 contacts with capacity for up to 44 differential data pairs in a GSSGSSG contact pattern.

Storage Networking Industry Association (SNIA) · SNIA REF-TA-1012 Rev 1.0: SFF-TA-1002 alternate pin assignments ↗
Sections 2–3 and Table 3-1: connector variations, contact counts, differential-pair capacity and alternate assignment contexts · Alternate assignments vary by implementation context; connector variation alone does not establish lane enablement, power/sideband wiring, platform support or fabrication dimensions.

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

Discovery Quality III

Questions this record helps answer

All focused explainers →

EDSFF / SFF-TA-1002 connector form vs assignmentWhat can the 1C / 2C / 4C / 4C+ connector form tell me, and what still depends on the exact EDSFF implementation?

Evidence behind this page

Scope first. Source second. Approval separate.

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

Page scope: Original V51 engineering boundary schematic; not to scale and not a logical pinout, mating gauge or manufacturing drawing.

Assessment 2026-10-22 · earliest scheduled source review 2027-01-04. 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

S334 · SNIA REF-TA-1012 SFF-TA-1002 connector variations — 4C

SNIA · Standards-organization domain · inspected 2026-10-06 · due 2027-01-04

Within inspection window

Scoped support: Draft REF-TA-1012 Rev 0.0.2 identification reference for the SFF-TA-1002 4C connector variation; used only for the stated contact-count/form fact.

Not established / limitations: Source-backed identification does not establish universal wiring, protocol generation, device compatibility, safe installation or fabrication approval.

Locator: Section 3.1 overview, 4C connector variation

S356 · SNIA REF-TA-1012 Rev 1.0: SFF-TA-1002 alternate pin assignments

Storage Networking Industry Association (SNIA) · Standards-organization domain · inspected 2026-10-06 · due 2027-01-04

Within inspection window

Scoped support: Published reference context for SFF-TA-1002 1C/2C/4C/4C+ contact counts and GSSGSSG differential-pair structure; V51 does not reproduce the copyrighted assignment table or normalize one universal logical pinout.

Not established / limitations: Alternate assignments vary by implementation context; connector variation alone does not establish lane enablement, power/sideband wiring, platform support or fabrication dimensions.

Locator: Sections 2–3 and Table 3-1: connector variations, contact counts, differential-pair capacity and alternate assignment contexts

Trace 2 claims to their source records

C293A · P293

SNIA REF-TA-1012 identifies the SFF-TA-1002 4C connector variation as a 140-contact connector with up to 44 differential pairs of data signals.

Claim scope: V50 identification fact only; no wiring, protocol compatibility, installation or fabrication approval is inferred.

Source links: S334 · Evidence trail → (private workspace)

C293B · P293

SNIA’s published reference describes the SFF-TA-1002 4C variation as 140 contacts with capacity for up to 44 differential data pairs in a GSSGSSG contact pattern.

Claim scope: Engineering identification context only; alternate assignment tables are implementation-specific and V51 does not normalize a universal logical pinout.

Source links: S356 · Evidence trail → (private workspace)

Prepare this page for review →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.