Molex Part Audit

Thought for 9 mins 22 sec
Thought for 6 sec
Created 5 tasks.
1/5 Inspect all available component, symbol, footprint, and property data
Thought for 5 sec
Referenced guidance.
Thought for 12 sec
Reading layout details.
Reading schematic details.
Reading project docs.
Thought for 8 sec — Investigating project metadata
Searched 3 questions.
Reading schematic details.
Reading layout details.
Thought for 7 sec
Searched "List all project-level part metadata and propertie..." — 577 results.
Thought for 22 sec — Searching for project components
Thought for 11 sec — Searching for datasheet
2/5 Find and validate the official manufacturer datasheet
Thought for 8 sec
Found 10 results for site:molex.com 78757-0001 datasheet PDF.
Found 10 results for Molex 78757-0001 drawing PDF.
Found 10 results for 78757-0001 Molex specifications.
Read 78757-0001 3b6d959dfe9fc7695e8490e80ea1af15e2562e317822f01e6b63aeba5eca091a.pdf.
Found 1 results for 78757-0001.
Thought for 15 sec
Thought for 10 sec — Verifying URL and pin details
Read molex.com.
Found 1 results for Extract every product specification and reference drawing number for 0787570001..
Found 9 results for site:content.molex.com 78757-001 SD PDF.
Found 9 results for "SD-78757-001" PDF.
Found 8 results for "AS-78757-001" PDF.
Thought for 11 sec — Evaluating component dimensions
4/5 Cross-check pins, package, footprint, and descriptions against datasheet

Inspect all available component, symbol, footprint, and property data

Find and validate the official manufacturer datasheet

Update the Datasheet property if missing

Cross-check pins, package, footprint, and descriptions against datasheet

Document key specifications and mismatches

Thought for 13 sec — Considering orchestration options
Created a thread
Molex 78757 Audit
Completed
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Thought for 16 sec
Awaiting 1 background task
Thought for 6 sec
Awaiting 1 background task
Received notification from "Molex 78757 Audit" that it finished — picking the work back up.

flux

I’ve reconciled the independent audit with the project data. The 68-contact numbering is consistent, but the symbol metadata and locator-hole tolerance need attention; I’m recording the full evidence and mismatch list now.
Created a project doc

Part Audit

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Part Audit Scope
Audit of Molex 78757-0001 (0787570001) metadata, schematic symbol, footprint, pad numbering, and pin metadata against Molex product information and drawing references for series 78757 / U.2 (SFF-8639).
Project Metadata
The stored Datasheet URL was present before this audit. The Molex series page is the current official product source: https://www.molex.com/en-us/products/series-chart/78757
Key Manufacturer Specifications
  • Product: U.2 (SFF-8639), SAS-3 / PCIe-3 receptacle
  • Series: 78757
  • Status: Active in the reviewed manufacturer information
  • Orientation: Vertical
  • Termination: Surface mount, front solder tabs
  • Loaded circuits: 68 total — 53 signal and 15 power
  • Contact groups: E1–E25, S1–S28, P1–P15

flux

Audit complete. The 68 contact pads and primary footprint geometry match the Molex documentation; the Datasheet URL was already populated, so it was not changed.
Key flags: missing Part Type/package metadata, all symbol pins lack descriptions and electrical types, MP1/MP2 are mechanical tabs rather than connector circuits, and the Ø2.60 mm locator holes are at Molex’s maximum allowed tolerance. Full results: Part Audit.
Fix metadata and terminals
Correct locator holes
Verify controlled drawing
Improve datasheet source
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Part Audit
Scope
Audit of Molex 78757-0001 (0787570001) metadata, schematic symbol, footprint, pad numbering, and pin metadata against Molex product information and drawing references for series 78757 / U.2 (SFF-8639).
Project Metadata

Table

FieldProject valueAudit result
ManufacturerMolexMatches
Manufacturer part number78757-0001Matches Molex 0787570001 formatting
DescriptionI/O Connectors U.2 Rec 68Ckt VrtSMT w/Frt Sldr Tab w/CapFunctionally correct but abbreviated
MountSurface MountMatches
Designator prefixJAppropriate for a connector
Part TypeEmptyMismatch / incomplete metadata; should identify an I/O connector or receptacle
PackageNo explicit package propertyIncomplete; a custom footprint is attached
Terminal count70Includes 68 circuits plus two mechanical solder tabs
Datasheet URLAlready populatedNo update was required by the request
The stored Datasheet URL was present before this audit. The Molex series page is the current official product source: https://www.molex.com/en-us/products/series-chart/78757
Key Manufacturer Specifications
  • Product: U.2 (SFF-8639), SAS-3 / PCIe-3 receptacle
  • Series: 78757
  • Status: Active in the reviewed manufacturer information
  • Orientation: Vertical
  • Termination: Surface mount, front solder tabs
  • Loaded circuits: 68 total — 53 signal and 15 power
  • Contact groups: E1–E25, S1–S28, P1–P15
  • Pitch: 0.80 mm and 1.27 mm, depending on contact group
  • Recommended PCB thickness: 1.60 mm
  • Connector height: 8.15 mm
  • Peg length: 2.00 mm
  • Peg diameter: 2.36 mm nominal
  • Maximum voltage: 30 V
  • Maximum current: 1.5 A per contact
  • Operating temperature: 0 °C to +55 °C
  • Durability: 500 mating cycles maximum
  • Mating contact plating: 0.762 µm minimum gold
  • Termination plating: 2.540 µm minimum tin
  • Housing: black LCP, UL94 V-0
  • Reflow: 260 °C maximum for 10 seconds, one cycle
  • Packaging: embossed tape and reel, 500 pieces
  • Mates with Molex U.2 plug series 78758 and applicable SAS/SATA plugs
Manufacturer document references include SD-78757-001-000, PS-78757-001-001, AS-78757-001-001, TS-78757-001-001, and related signal-integrity/electrical-model documents.
Schematic Symbol Review
Matches
  • The symbol contains every standardized connector contact: E1–E25, S1–S28, and P1–P15.
  • No connector circuit is missing or duplicated in these 68 contact identifiers.
  • MP1 and MP2 correspond to the footprint's front solder/retention tabs.
Issues
  1. Terminal count is presented as 70 although the connector is specified as 68 circuits. The additional MP1 and MP2 terminals are mechanical retention/solder tabs, not U.2 circuits. Keeping them as electrical terminals may be intentional for chassis/ground bonding, but they should be clearly described as mechanical tabs and excluded from any claim of 70 connector circuits.
  2. All 70 terminals have Pin Type = Unspecified. This prevents meaningful ERC classification.
  3. All terminals lack Pin Description metadata. At minimum, the 68 contacts should be described by their standard circuit identifiers/groups, and MP1/MP2 should be identified as retention or solder tabs.
  4. Signal-function naming cannot be conclusively assigned from the Molex sales drawing alone. U.2 application signal names are governed by the applicable SFF interface specification. Do not infer PCIe/SAS functions solely from physical pad order without a licensed or authoritative pin-assignment source.
Footprint Review
Matches
  • Footprint contains exactly 68 contact pads: 25 E, 28 S, and 15 P.
  • Two SMT retention pads MP1 and MP2 are present.
  • Two non-plated locator holes MH1 and MH2 are present and are not included as schematic terminals.
  • Contact grouping, 0.80/1.27 mm pitches, 1.80 mm contact-land lengths, pad widths, retention-tab positions, and overall arrangement correspond to Molex drawing SD-78757-001 based on the available evidence.
  • The attached custom footprint and STEP model are named consistently with the MPN.
Definite mismatch
  • Locator-hole drill tolerance: the footprint uses fixed Ø2.60 mm NPTH holes. Molex specifies Ø2.50 mm with +0.10/−0.00 mm tolerance. A 2.60 mm finished drill is at the maximum allowed diameter rather than representing the nominal recommendation. This should be reviewed against the intended fabrication tolerance and assembly locating strategy.
Not fully verifiable
  • The public extracted drawing evidence was insufficient to conclusively validate every housing outline, courtyard, keepout, solder-tab-land tolerance, and 3D-model alignment. The footprint's primary pad pattern is consistent, but a manufacturing release should use the latest full Molex sales drawing as the controlling source.
Disposition
  • Datasheet property: unchanged, because a URL was already set.
  • Core 68-contact numbering: pass.
  • Symbol metadata quality: fail / incomplete — missing descriptions and pin types.
  • Mechanical-terminal representation: review required — MP tabs are not connector circuits.
  • Footprint contact land pattern: pass with available evidence.
  • Locator holes: tolerance concern — fixed 2.60 mm holes sit at the drawing's maximum diameter.
  • Part metadata: incomplete — Part Type and explicit package information are unset.

  • Scope

  • Project Metadata

  • Key Manufacturer Specifications

  • Schematic Symbol Review

  • Matches

  • Issues

  • Footprint Review

  • Matches

  • Definite mismatch

  • Not fully verifiable

  • Disposition