Molex Part Review

A

adrian95

Review all available part information (MPN, package, pin count, description, properties). If no datasheet URL is already set, search the web for the official datasheet and update the part's Datasheet property with the URL. Then cross-check the schematic symbol, footprint, and pin descriptions against the datasheet. Summarize key specs and flag any mismatches.

flux

I’ll inspect the part metadata, look for an official datasheet if needed, update the Datasheet property only if it’s missing, then compare symbol/footprint/pin info against the datasheet and report mismatches.
Created a project doc

Part Review - Molex 105309-1202

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Date: 2026-07-21 Reviewed available Flux part information, official Molex datasheet/product data, schematic symbol terminals, footprint geom...

flux

Reviewed the Molex 105309-1202 part against official Molex data. The Datasheet URL was already set to the official Molex sales drawing, so I did not change it.
Full findings are in Part Review - Molex 105309-1202. Key result: identity and footprint dimensions look consistent; main flagged issues are missing pin descriptions and Unspecified pin types, which should be Passive with descriptions like Circuit 1 / CKT 1 and Circuit 2 / CKT 2.
Suggested next steps:
  • Update terminal pin metadata to Passive.
  • Add pin descriptions for both contacts.
  • Visually verify the CKT1 marker orientation against the Molex connector-side PCB view before publishing any footprint revision.
Fix metadata and verify
Update pin metadata
Verify footprint orientation
Run design checks
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Part Review - Molex 105309-1202
Date: 2026-07-21
Scope
Reviewed available Flux part information, official Molex datasheet/product data, schematic symbol terminals, footprint geometry, and pin descriptions for the published part project silicon-yard/105309-1202.
Sources Checked
Current Flux Part Information

Table

FieldCurrent valueReview result
Project name105309-1202OK
Published part UIDc59667a5-fd4a-403c-9498-ccbeb5d41ba1OK
Library part name1053091202OK
DescriptionMolex Nano-Fit 105309, 2.5mm Pitch, 2 Way, 1 Row, Vertical PCB Header, Through HoleMatches datasheet/product page
Manufacturer NameMolexMatches
Manufacturer Part Number105309-1202Matches
Designator PrefixJAppropriate for connector/header
Part TypeConnectorsAppropriate, though singular Connector would also be acceptable if standardized elsewhere
MountThrough HoleMatches
Terminal count2Matches 2 circuits / 2 loaded contacts
Datasheet URLhttps://www.molex.com/pdm_docs/sd/1053091202_sd.pdfAlready present; no update was required
Package / case code from library resultTOLikely not meaningful for this connector; footprint itself is custom and correct-looking
Key Official Specs

Table

SpecOfficial value
SeriesMolex Nano-Fit, series 105309
Part / SKU105309-1202 / 1053091202
Connector styleVertical shrouded male PCB header, wire-to-board power connector
Positions / circuits2 loaded, 2 maximum
Rows1 / single row
Pitch2.50 mm mating interface, 2.50 mm termination interface
Termination / mountThrough-hole, kinked pins
PC tail length3.20 mm
Recommended PCB thickness1.60 mm to 2.40 mm
Current ratingProduct page: 8.0 A max per contact. Product spec guidance for 2-circuit single-row, fully loaded, all circuits powered: 8.0 A with 20 AWG, 6.5 A with 22 AWG, 6.0 A with 24 AWG, 5.0 A with 26 AWG; application derating required
Voltage rating250 V AC RMS / DC
Operating temperature-40 °C to +125 °C, including temperature rise
HousingBlack LCP
Terminal metalBrass
Mating platingGold, 0.381 µm minimum for this variant
Termination platingTin, 1.524 µm minimum
PackagingTray
Mating receptacle seriesMolex 105307 and 226354 noted in drawing/product information
Datasheet / Product Drawing Footprint Requirements

Table

FeatureDatasheet valueFlux footprint observedResult
Electrical contact count22 TH pads, pad 1 and pad 2OK
Contact pitch2.50 mmPad 1 at X=0, pad 2 at X=2.50 mm in KiCad footprint payloadOK
Contact drillØ1.20 ±0.05 mmDrill 1.20 mmOK
Contact pad diameterNot directly prescribed in extracted data; must provide annular ring1.80 mm pad, 1.20 mm drill = 0.30 mm annular ringReasonable / OK
Mechanical / locator holeØ1.30 ±0.05 mmNPTH pad 3 size/drill 1.30 mmOK
Mechanical hole locationDrawing shows centered between contacts, 1.25 mm from pad 1 and 1.34 mm offset from pin rowPad 3 at X=1.25 mm, Y=1.34 mm in KiCad footprint payloadOK based on extracted drawing data
Pin-1 / CKT1 markingCKT 1 shown in recommended PCB viewSilk/fab includes a CKT1 marker line/diagonal near pad 1 areaAppears OK; visual orientation should be checked against Molex connector-side PCB view before publishing revisions
Courtyard / keepoutDrawing shows connector body envelope and keepout/courtyard-type geometryFootprint has F.CrtYd rectangle and silk/fab outlinesGenerally OK; detailed keepout zones should be verified visually against drawing if strict mechanical clearance is required
Schematic Symbol / Terminal Review

Table

TerminalCurrent Pin NumberCurrent Pin TypeCurrent Pin DescriptionDatasheet functionResult
11UnspecifiedMissingCircuit 1 passive connector contactMismatch / improvement recommended
22UnspecifiedMissingCircuit 2 passive connector contactMismatch / improvement recommended
The datasheet does not assign signal names such as VIN/GND; both pins are generic connector circuits. The better symbol metadata is:

Table

TerminalRecommended Pin TypeRecommended Pin Description
1PassiveCircuit 1 / CKT 1
2PassiveCircuit 2 / CKT 2
Mismatches / Issues Flagged
  1. Schematic terminal pin types are Unspecified
    The pins should be Passive connector contacts. This is a metadata quality issue, not a footprint geometry issue.
  2. Pin descriptions are missing
    Add Circuit 1 / CKT 1 and Circuit 2 / CKT 2 so the symbol reflects the Molex drawing and improves user clarity.
  3. Library search reports package_case_code: TO
    This appears inappropriate/non-informative for a connector. The actual footprint is custom and matches the drawing, so this is likely a metadata classification artifact rather than a layout problem.
  4. Pin-1 orientation should be visually verified before any footprint revision
    The CKT1 marker appears present and near pad 1, but orientation-sensitive connector footprints should always be checked against the official Molex connector-side PCB view.
  5. Datasheet URL was already set
    No Datasheet property update was needed.
Verdict
The part identity, datasheet URL, terminal count, through-hole footprint pitch, plated contact drills, and mechanical locator hole dimensions are consistent with the official Molex 105309-1202 data. The main issues are symbol metadata improvements: set both pins to Passive and add Circuit 1 / Circuit 2 descriptions. No major footprint mismatch was found from the extracted drawing data.

  • Scope

  • Sources Checked

  • Current Flux Part Information

  • Key Official Specs

  • Datasheet / Product Drawing Footprint Requirements

  • Schematic Symbol / Terminal Review

  • Mismatches / Issues Flagged

  • Verdict