Molex Part Review

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
Update package metadata
2
Pin Number
2
1
Pin Number
1

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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

Documents

Assets

kicad_mod

105309-1202

1053091202.kicad_modFootprint
1053091202-thumb.png

1053091202-thumb.png

1053091202-thumbThumbnail
105309-1202

105309-1202

105309-1202.stp3D Model
svg

105309-1202

105309-1202 Symbol.svgDefault

1053091202

1053091202 thumbnail
Connector Header Through Hole 2 position 0.098" (2.50mm)
Nano-Fit Vertical Header Connector designed for through-hole PCB power connections, featuring a single-row, 2-circuit configuration with 2.50 mm pitch and kinked pins. It uses a vertical orientation, male contacts with 0.38 µm gold plating on the mating interface, tin-plated termination, black LCP housing, and supports an operating temperature range of -40°C to +125°C.
#Connector #PowerConnector #HeaderConnector #ThroughHole #NanoFit #Molex #1053091202

Properties

105309-1202

Molex

Connectors

molex.com/pdm_docs/sd/1053091202_sd.pdf

J

Through Hole

parametric-v1

creativecommons.org/licenses/by/4.0/

Pricing & Availability

DPN

Stock

Qty 1

1

0

$2.85

Controls