FIELD GUIDESource-led reference

P242 / Legacy computer / Connector

40-position 2.54 mm IDC ribbon header

A 40-position, two-row 2.54 mm ribbon-cable header is visually close to other IDC families, so count and keying matter before any protocol assumption.

Also called IDC 40 40-pin ribbon header 40 position ribbon connector 2x20 IDC

A familiar 40-position ribbon form does not by itself prove ATA/PATA, GPIO or another historical bus assignment.

Look for

Confirm the 40-position, two-row layout and housing keying from the exact host or cable documentation rather than relying on the “IDE cable” shorthand.

Claim inspection dates: 2026-10-06 · Independent review pending

The useful distinction

Recognize it. Then verify it.

A 40-position, two-row 2.54 mm ribbon-cable header is visually close to other IDC families, so count and keying matter before any protocol assumption. [C242A]

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 contacts40S262Source-backed nominal position/contact count: 40.
Positions / cavity span40 (Claim C242A); 40 (Claim C242B)S262 · S286Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof. V44 engineering reference for the cited component only; not a universal IDC pinout, wiring diagram, fabrication tolerance or device-compatibility statement.
Contact rows2 (Claim C242A); 2 (Claim C242B); 2 (1-1761685-3)S262 · S286 · S262Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. TE Connectivity identifies part 1-1761685-3 as a 40-position, two-row ribbon-cable header with a 2.54 mm centerline. | V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof. TE Connectivity specifies part 1-1761685-3 as a vertical two-row 40-position pin header on 2.54 mm centers with mating alignment and ejection-latch retention. | V44 engineering reference for the cited component only; not a universal IDC pinout, wiring diagram, fabrication tolerance or device-compatibility statement. 1-1761685-3. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
Contact pitch2.54 mm Centerline pitch (Recorded example component); 2.54 mm Source-described pitch / centerline (Claim C242A); 2.54 mm centerline (1-1761685-3)S286 · S262 · S262Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. example_component; two-row vertical wire-to-board pin header V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof. 1-1761685-3. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
Dimensions / axis69.85 mm connector length (1-1761685-3); 8.89 mm connector height (1-1761685-3)S262Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 1-1761685-3. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
Connector roleheader; plug (1-1761685-3)S262 · S286 · S262Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. two-row vertical wire-to-board pin header 1-1761685-3. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
Coupling / latchlatch (Claim C242B)S286Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V44 engineering reference for the cited component only; not a universal IDC pinout, wiring diagram, fabrication tolerance or device-compatibility statement.
ManufacturerTE Connectivity (1-1761685-3)S262Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 1-1761685-3. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
SeriesAMP-LATCH NOVO (1-1761685-3)S262Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 1-1761685-3. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
Exact part / implementation1-1761685-3 (1-1761685-3)S262Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 1-1761685-3. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.

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

Recorded variant and source limits
  • No IDE/ATA or other protocol pin map is inferred from the 40-position header form.
  • Product dimensions, latch features and pitch do not constitute a fabrication drawing or device compatibility result.
  • Center mating alignment without an identified key/polarizing feature remains context rather than target-qualified keying. Recorded source context: Center mating alignment; ejection latches / 1-1761685-3
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Bounded facts, visible unknowns

Specifications and limits

40-position 2.54 mm IDC ribbon header facts and limitations
Documented identification40-position/contact recognition fact in the cited implementation. [C242A]
Mechanical dimensionsNo independently reviewed mechanical drawing in V43; do not use this page for fabrication, fit testing or tolerance work.
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.

Use the source-backed form or position count only for identification. Resolve ratings, protocol, direction, wiring, cable construction and exact device support from the relevant equipment and component documentation.

Before you connect

What to check

  1. Identify the exact connector family and variant from the equipment or cable documentation.
  2. Keep shape, contact count, protocol, electrical rating and device support as separate facts.
  3. Do not force, rewire or adapt a connector from this recognition record; resolve the remaining requirements first.
Trace a supported connection class →

What is not established

This field note does not approve a connection, adapter, cable assembly, rewiring scheme or fabricated part. It intentionally omits unsupported pin assignments and mechanical tolerances.

Your next step

Move from the form to the requirement.

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 ↑
C242ASource checked · pending review

TE Connectivity identifies part 1-1761685-3 as a 40-position, two-row ribbon-cable header with a 2.54 mm centerline.

TE Connectivity · 40-position AMP-LATCH ribbon header ↗

Locator: Product configuration summary
Access: public page. Identification/reference scope only. V43 does not convert this source into a universal pinout, fabrication drawing, electrical approval, protocol guarantee or end-to-end compatibility verdict.

S262: full source recordInspect review dependencies → (private workspace)

Claim scope: V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof.. Next review due 2027-01-04.

Suggest a correction to this field note →

Put this field note to work.

Add to discovery trayRecord an unsaved candidate (private workspace)

Compare look-alikes: 34-, 40- and 50-position IDC ribbon headers

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

Evidence behind this page

Scope first. Source second. Approval separate.

1 linked sources · 1 scoped claims · 0 sources with inspection/access flags.

Page scope: catalogue_expansion_v43

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 1 source scopes, access limits and dates

S262 · 40-position AMP-LATCH ribbon header

TE Connectivity · Manufacturer / product-owner domain · inspected 2026-10-06 · due 2027-01-04

Within inspection window

Scoped support: Identifies a 40-position, two-row, 2.54 mm AMP-LATCH ribbon-cable header; V43 uses only recognition facts.

Not established / limitations: Identification/reference scope only. V43 does not convert this source into a universal pinout, fabrication drawing, electrical approval, protocol guarantee or end-to-end compatibility verdict.

Locator: Product configuration summary

Trace 1 claims to their source records

C242A · P242

TE Connectivity identifies part 1-1761685-3 as a 40-position, two-row ribbon-cable header with a 2.54 mm centerline.

Claim scope: V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof.

Source links: S262 · 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.