FIELD GUIDESource-led reference
Port & Cable

P001 / USB / Connector

USB Type-A

USB Type-A has a rectangular mating profile. Legacy and newer USB implementations can use this shape.

Also called USB-A Type A USB type A

A familiar rectangle does not tell you its data rate.

Look for

Look for the broad rectangle and internal tongue. Inspect a disconnected connector in good light; do not infer the specification from the plastic color.

Claim inspection dates: 2026-10-01, 2026-10-13, 2026-10-22 · Independent review pending

USB Type-A: 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.

USB Type-A: 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.

USB Type-A: 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.

USB Type-A: original recognition drawing, not to scale.

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

Image inspection / P001

See the view. Check its scope.

2 registered views for this reference. Different part examples are not automatically mates; all remain not to scale and independently unapproved.

USB Type-A: cable-end plug, mating-face outline. Rectangular plug shell with a simplified offset insert. Not to scale; no pinout. (private workspace)

P001 / Inherited recognition study

USB Type-A

USB Type-A / previously depicted manufacturer example

Mating-face outline · Cable plug / cable end

Not to scale. Technical and rights review pending.

Inspect view & provenance (private workspace)
USB Type-A: device receptacle, opening outline. Rectangular device opening with a simplified offset insert. Not to scale; no pinout. (private workspace)

P001 / Inherited recognition study

USB Type-A

USB Type-A / previously depicted manufacturer example

Opening outline · Device receptacle

Not to scale. Technical and rights review pending.

Inspect view & provenance (private workspace)

Visual reference / P001

A rectangle is the starting clue.

PLUG + PORT

Recognition, not measurement. Each drawing is fitted independently: equal boxes do not mean equal sizes. Contact detail is deliberately omitted.

01 / Cable-end plugMating-face outline
USB Type-A: cable-end plug, mating-face outline. Rectangular plug shell with a simplified offset insert. Not to scale; no pinout.

Looking toward the plug opening; not the wire or solder side.

Qualitative recognition study interpreted from the pictured manufacturer example. Inner contacts, exact dimensions and hidden surfaces are omitted.

02 / Device receptacleOpening outline
USB Type-A: device receptacle, opening outline. Rectangular device opening with a simplified offset insert. Not to scale; no pinout.

Looking into the device opening as pictured; not a rear or board view.

Simplified opening from the cited device-port illustration. Product bezel, contact count and internal construction are not generalized.

Two things to notice

  1. Rectangular metal shell
  2. Offset interior insert; detail simplified

What the picture cannot tell you

A common USB-A outline does not identify the USB generation. Contact counts and insert color are intentionally not used.

Sources, drawing scope & rights

Visual references checked 2026-10-09. These are new, source-scoped recognition studies, not approved mechanical drawings, pinouts or compatibility verdicts. Independent drawing review remains pending.

Original Port & Cable vector study. Third-party reference photographs are linked, not copied or bundled.

C2G / Legrand — USB connector guide
Manufacturer cable-end photographs: Type A, Type C, Mini-B 5-pin, Micro-B and USB 3.0 Micro-B. Identity and visible exterior of the pictured cable plugs only. Performance prose was not adopted.

Apple — Identify the ports on your Mac
USB-A; Thunderbolt / USB-C; HDMI; Mini DisplayPort port illustrations. Illustrated receptacle openings only. A common outline does not establish protocol or model support.

Source image: Cable-end plug →Source image: Device receptacle →

This inspection does not refresh any canonical claim, source-review date or publication approval.

Look twiceCompare USB Type-C →Compare SuperSpeed USB Type-B →

The useful distinction

Recognize it. Then verify it.

USB Type-A has a rectangular mating profile. Legacy and newer USB implementations can use this shape. [C001A]

C2G warns against using an ordinary A-to-A cable to connect two computers. [C001B]

Legrand’s USB connector guide distinguishes the additional contacts in the USB 3.0 Type-A implementation from the earlier Type-A form, despite the similar outer shape. [C001D]

Molex specifies 676430910 as a USB-A USB2 receptacle, 4 loaded circuits and 1 row(s), with mating-interface pitch 2.00mm, 2.50mm. [C001W]

Identify the documented form

Identify a rectangular USB end before checking its device role.

  1. Use the broad rectangular mating profile as the family clue; plastic color is not a documented generation identifier. S002
  2. The similar outer Type-A shape can contain the additional contacts of a newer implementation. Read the exact port and cable documentation. S001
Documented identity facts; exact part and variant scope remains with each value
Nominal contacts4 (USB 2.0 Standard-A); 9 (USB 3.x Standard-A)S363 · S651 · S652 · S653Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Standard-A contact-count engineering context only. Named nine-contact Standard-A research variant, excluding the shell. Per-contact status and original source scope remain controlling.
Positions / cavity spanNot 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.
Connector roleplug; socket; socket (614004190021)S002 · S363 · S860 · S874Separate exact examples; retain each value’s source, role, axis and part scope. plug and receptacle interface Exact named example 614004190021: USB 2.0 Standard-A PCB receptacle. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Drawing dimension axes not visually inspected; no shell dimensions or mating pitch proposed.
Rows, pitch, dimensions, keying and view limits
Additional scoped facts; not a fabrication drawing or a mating approval
Contact rows1 (Molex 676430910)S970Current primary-source scoped values; named examples remain separate and unknowns are not inferred from illustrations. Exact Molex 676430910, female right-angle USB-A USB2 receptacle; manufacturer mating-interface/row fields only, not a universal family value. Quantity context: Manufacturer Number of Rows property.
Contact pitch2 mm Manufacturer Pitch - Mating Interface; internal gap order and physical projection not further dimensioned (Molex 676430910); 2.5 mm Manufacturer Pitch - Mating Interface; internal gap order and physical projection not further dimensioned (Molex 676430910)S970Current primary-source scoped values; named examples remain separate and unknowns are not inferred from illustrations. Exact Molex 676430910, female right-angle USB-A USB2 receptacle; manufacturer mating-interface/row fields only, not a universal family value.
Dimensions / axisNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Coupling / latchNot 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.
View conventionSYS-427X manual receptacle-opening drawing: legacy contacts labelled 4 at left and 1 at right; SuperSpeed contacts labelled 5 at left and 9 at right. (WINSYSTEMS SYS-427X J17); SYS-427X manual receptacle-opening drawing: four contacts labelled 4 at left and 1 at right. (WINSYSTEMS SYS-427X J10/J11)S652 · S652Exact source-view examples remain separate from other roles, parts and generated schematics. Exact WINSYSTEMS SYS-427X J17 USB 3.1 Gen 1 Type-A receptacle example, not every Type-A part. Source page pixels inspected2026-10-22; no pitch, dimensions or electrical assignment added. Exact WINSYSTEMS SYS-427X J10/J11 USB2.0 Type-A receptacle example, not every Type-A part. Source page pixels inspected2026-10-22; no pitch, dimensions or electrical assignment added.
Contact gender / arrangementNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Mountinghorizontal THT (614004190021)S860 · S874Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example 614004190021: USB 2.0 Standard-A PCB receptacle. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Drawing dimension axes not visually inspected; no shell dimensions or mating pitch proposed.
Shell / formNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
ManufacturerWürth Elektronik (614004190021)S860 · S874Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example 614004190021: USB 2.0 Standard-A PCB receptacle. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Drawing dimension axes not visually inspected; no shell dimensions or mating pitch proposed.
SeriesWR-USB Standard (614004190021)S860 · S874Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example 614004190021: USB 2.0 Standard-A PCB receptacle. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Drawing dimension axes not visually inspected; no shell dimensions or mating pitch proposed.
Exact part / implementation614004190021 (614004190021)S860 · S874Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example 614004190021: USB 2.0 Standard-A PCB receptacle. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Drawing dimension axes not visually inspected; no shell dimensions or mating pitch proposed.
Recorded markingsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Keep this limit: An ordinary A-to-A cable is not the documented way to connect two computers. S001

Make the next check

Record both cable ends and the host/device functions before selecting a replacement.

Existing source inspection and AI review remain distinct from independent technical review. A matching form does not establish a safe connection.

Recorded variant and source limits
  • No V54 contact numbering or electrical assignment map is published.
  • Connector shape and four-contact count do not identify the USB generation or device capability.
  • USB 2.0 four-contact Standard-A: Receptacle face: 4 at left, 1 at right, per SYS-427X p. 21.
  • USB 3.x nine-contact Standard-A: Receptacle face: legacy row 4 left/1 right; SuperSpeed row 5 left/9 right, per SYS-427X p. 20.
  • Prior view context (not a source-view value): Contact count only in V54; no numbered mating-face map is reproduced, avoiding mirrored-orientation mistakes.
Report a correction to this identification or view →

Bounded facts, visible unknowns

Specifications and limits

USB Type-A facts and limitations
Physical categoryConnector, not protocol [C001A] [C001B]
ReversibleNo; inspect orientation [C001A] [C001B]
Maximum speedNot determined by shape [C001A] [C001B]
Scoped referenceType-A is a form, not one contact implementation. [C001D] [C001B]
Mechanical dimensionsNo independently reviewed mechanical drawing in this release; do not use this page for fabrication.
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.

This record is an identification starting point. It does not provide measured mating tolerances, electrical approval, or a list of verified device models. Use the original device and accessory documentation to resolve the remaining requirements.

Before you connect

What to check

  1. Read the host and peripheral documentation separately.
  2. Check the stated data mode on the cable, not just its ends.
  3. Do not join two computers with a bare A-to-A cable. A purpose-built transfer product is a different class.
Trace a supported connection class →

Can I connect…

Common connections for this connector

All connection questions →

Pins & wiring

Pinout

Choose the exact wiring. Pin numbers follow its stated view; a schematic does not establish physical positions. Check your exact device before wiring.

What the status labels mean
Confirmed
Recorded research passes agree within this variant; this is not independent human review or hardware validation.
Single source
Only one underlying document, or one pass, supports this assignment.
Device-specific
Supported for the named equipment or wiring only. Check your device’s manual.
Unverified
Missing or conflicting evidence. Do not wire from this row.
Not connected
The source explicitly says NC, no contact or no pin for this wiring.
Wiring variant

USB 2.0 four-contact Standard-A

View and evidence limits

Receptacle face: 4 at left, 1 at right, per SYS-427X p. 21.

  • P001 USB Type-A — Agree (USB 2.0: 4 pins; USB 3.x: 9 pins + shell) — USB-IF specifications reached.
  • Charge-only, proprietary extra-contact, special A-to-A and later edition exceptions are not established here.
USB Type-A engineering referenceReceptacle face: 4 at left, 1 at right, per SYS-427X p. 21.SCHEMATIC · physical positions unconfirmedNot to scale · check the named wiring and device manual1: VBUS (single_source)12: D− (single_source)23: D+ (single_source)34: GND (single_source)4powergrounddataConfigshieldNCUnknown
Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.
USB 2.0 four-contact Standard-A — source-scoped contact map
PinSignalWhat it doesStatus
1VBUSUSB bus power; voltage and current depend on the device.Single source
Sources
2D−Control, detection or configuration connection; check the source and device.Single source
Sources
3D+USB 2.0 data, positive side of the pair.Single source
Sources
4GNDGround reference and return.Single source
Sources
Sources (3)

USB 3.x nine-contact Standard-A

View and evidence limits

Receptacle face: legacy row 4 left/1 right; SuperSpeed row 5 left/9 right, per SYS-427X p. 20.

  • P001 USB Type-A — Agree (USB 2.0: 4 pins; USB 3.x: 9 pins + shell) — USB-IF specifications reached.
  • Charge-only, proprietary extra-contact, special A-to-A and later edition exceptions are not established here.
USB Type-A engineering referenceReceptacle face: legacy row 4 left/1 right; SuperSpeed row 5 left/9 right, per SYS-427X p. 20.SCHEMATIC · physical positions unconfirmedNot to scale · check the named wiring and device manual1: VBUS (single_source)12: D− (single_source)23: D+ (single_source)34: GND (single_source)45: StdA_SSRX− (single_source)56: StdA_SSRX+ (single_source)67: GND_DRAIN (single_source)78: StdA_SSTX− (single_source)89: StdA_SSTX+ (single_source)9powergrounddataConfigshieldNCUnknown
Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.
USB 3.x nine-contact Standard-A — source-scoped contact map
PinSignalWhat it doesStatus
1VBUSUSB bus power; voltage and current depend on the device.Single source
Sources
2D−Control, detection or configuration connection; check the source and device.Single source
Sources
3D+USB 2.0 data, positive side of the pair.Single source
Sources
4GNDGround reference and return.Single source
Sources
5StdA_SSRX−Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
6StdA_SSRX+Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
7GND_DRAINControl, detection or configuration connection; check the source and device.Single source
Sources
8StdA_SSTX−Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
9StdA_SSTX+Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
Sources (3)

Type-A is a form, not one contact implementation.

Keep the USB 2.0 and USB 3.0 contact implementations distinct. An outer rectangle does not establish the cable or port performance. Ordinary A-to-A leads are not a general way to join two computers.

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 ↑
C001ASource checked · pending review

USB Type-A has a rectangular mating profile. Legacy and newer USB implementations can use this shape.

Cable Matters · USB connector cable types ↗

Locator: USB-A, USB-B and USB-C sections
Access: public page. Do not infer video, power or backward compatibility from this broad guide.

S002: full source recordInspect review dependencies → (private workspace)

Claim scope: Consumer identification / documented standard or product class only. Next review due 2026-12-30.

Back to first citation ↑
C001BSource checked · pending review

C2G warns against using an ordinary A-to-A cable to connect two computers.

C2G / Legrand · USB connector guide ↗

Locator: USB A-Type; B-Type; Mini-B; Micro-B; USB 3.0 B-Type and Micro-B sections
Access: public page. Older capability descriptions elsewhere on this page are not used as current universal limits.

S001: full source recordInspect review dependencies → (private workspace)

Claim scope: Narrowly stated supporting distinction; not an end-to-end device guarantee. Next review due 2026-12-30.

Back to first citation ↑
C001DSource checked · pending review

Legrand’s USB connector guide distinguishes the additional contacts in the USB 3.0 Type-A implementation from the earlier Type-A form, despite the similar outer shape.

C2G / Legrand · USB connector guide ↗

Locator: USB A-Type; B-Type; Mini-B; Micro-B; USB 3.0 B-Type and Micro-B sections
Access: public page. Older capability descriptions elsewhere on this page are not used as current universal limits.

S001: full source recordInspect review dependencies → (private workspace)

Claim scope: V145: Legacy and USB 3.0 Type-A identification only; not a speed, charging or universal four-contact claim.. Next review due 2027-01-11.

Back to first citation ↑
C001WSource checked · pending review

Molex specifies 676430910 as a USB-A USB2 receptacle, 4 loaded circuits and 1 row(s), with mating-interface pitch 2.00mm, 2.50mm.

Molex · Molex 67643 series chart, exact 676430910 USB-A USB2 receptacle ↗

Locator: Full Export Spreadsheet table, exact 676430910 row: Web Description, Gender, Circuits Loaded, Number of Rows, Pitch - Mating Interface and separate Pitch - Termination Interface columns. Full official chart read; no PDF drawing pixels acquired.
Access: public page. Both 2.00 and 2.50 mm are in the one mating-pitch cell. No ordered gap pattern or uniform pitch asserted without a dimensioned drawing. Product detail page says Limited Information Available; chart fields retained without measured/toleranced drawing.

S970: full source recordInspect review dependencies → (private workspace)

Claim scope: Exact Molex 676430910, female right-angle USB-A USB2 receptacle; manufacturer mating-interface/row fields only, not a universal family value.. Next review due 2027-01-20.

Suggest a correction to this field note →

Put this field note to work.

Add to discovery trayRecord an unsaved candidate (private workspace)

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_pilot

Assessment 2026-10-22 · earliest scheduled source review 2026-12-30. 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

S001 · USB connector guide

C2G / Legrand · Manufacturer / product-owner domain · inspected 2026-10-01 · due 2026-12-30

Within inspection window

Scoped support: Connector identification and legacy mating distinctions only.

Not established / limitations: Older capability descriptions elsewhere on this page are not used as current universal limits.

Locator: USB A-Type; B-Type; Mini-B; Micro-B; USB 3.0 B-Type and Micro-B sections

S002 · USB connector cable types

Cable Matters · Manufacturer / product-owner domain · inspected 2026-10-01 · due 2026-12-30

Within inspection window

Scoped support: Narrow physical identification.

Not established / limitations: Do not infer video, power or backward compatibility from this broad guide.

Locator: USB-A, USB-B and USB-C sections

S970 · Molex 67643 series chart, exact 676430910 USB-A USB2 receptacle

Molex · Manufacturer / product-owner domain · inspected 2026-10-22 · due 2027-01-20

Within inspection window

Scoped support: Exact 676430910 specification row only.

Not established / limitations: Both 2.00 and 2.50 mm are in the one mating-pitch cell. No ordered gap pattern or uniform pitch asserted without a dimensioned drawing. Product detail page says Limited Information Available; chart fields retained without measured/toleranced drawing.

Locator: Full Export Spreadsheet table, exact 676430910 row: Web Description, Gender, Circuits Loaded, Number of Rows, Pitch - Mating Interface and separate Pitch - Termination Interface columns. Full official chart read; no PDF drawing pixels acquired.

Trace 4 claims to their source records

C001A · P001

USB Type-A has a rectangular mating profile. Legacy and newer USB implementations can use this shape.

Claim scope: Consumer identification / documented standard or product class only

Source links: S002 · Evidence trail → (private workspace)

C001B · P001

C2G warns against using an ordinary A-to-A cable to connect two computers.

Claim scope: Narrowly stated supporting distinction; not an end-to-end device guarantee

Source links: S001 · Evidence trail → (private workspace)

C001D · P001

Legrand’s USB connector guide distinguishes the additional contacts in the USB 3.0 Type-A implementation from the earlier Type-A form, despite the similar outer shape.

Claim scope: V145: Legacy and USB 3.0 Type-A identification only; not a speed, charging or universal four-contact claim.

Source links: S001 · Evidence trail → (private workspace)

C001W · P001

Molex specifies 676430910 as a USB-A USB2 receptacle, 4 loaded circuits and 1 row(s), with mating-interface pitch 2.00mm, 2.50mm.

Claim scope: Exact Molex 676430910, female right-angle USB-A USB2 receptacle; manufacturer mating-interface/row fields only, not a universal family value.

Source links: S970 · 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.