Part Datasheet Review and Validation

flux

Completed the part review and saved the detailed findings in Part Review: Molex 43045-0426.
Key flags: the existing Datasheet URL points to a 2-circuit drawing, while 43045-0426 is a 4-circuit Micro-Fit 3.0 header; the symbol shows six terminals even though only four are electrical contacts; pin types/descriptions are incomplete; and the footprint should be checked against the exact Molex 430450226 sales drawing for 4 signal holes + 2 retention holes.
adrian95

adrian95

Fix the Datasheet URL and pin metadata to match the exact Molex drawing.

flux

I’ll update the part to reference the exact Molex 430450226 sales drawing, then set the six terminal metadata so pins 1–4 are connector contacts and pins 5–6 are retention-clip/mechanical pads.

flux

Updated and verified the part metadata.
  • Datasheet URL now points to the exact Molex 43045-0426 / 4-circuit sales drawing: 430450226_sd.pdf
  • Pins 1–4 are marked as passive connector contacts with circuit descriptions.
  • Pins 5–6 are marked as not connected mechanical retention-clip / board-lock pads.
  • Verification confirmed the new Datasheet URL and terminal metadata are present.
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Part Review: Molex 43045-0426
Project metadata found
  • Project/part name: 43045-0426
  • Manufacturer Part Number: 43045-0426
  • Manufacturer: Molex
  • Description: Micro-Fit 3.0 Vertical Header, 3.00 mm Pitch, Dual Row, 4 Circuits, with PCB Press-fit Metal Retention Clip
  • Designator prefix: J
  • Mount: PCB
  • Part type: Connectors
  • Current Datasheet URL property: https://www.molex.com/pdm_docs/sd/430450224_sd.pdf
  • Published as Flux part: yes
  • Part UID: 6e0a7f75-4074-416a-b993-f95dc56a44e7
Official references checked
Key specs from official Molex documentation
  • Series/family: Micro-Fit 3.0, 43045 dual-row PCB header
  • Connector style: vertical, through-hole, shrouded/polarized header
  • Circuits: 4
  • Rows: 2
  • Positions per row: 2
  • Pitch: 3.00 mm
  • Row spacing: 3.00 mm
  • PCB holes: 6 total for 43045-0426 — 4 signal/contact holes plus 2 press-fit retention-clip holes
  • Retention clip: present for the -xx26 sales drawing variant
  • Current rating: 5 A max
  • Voltage rating: 600 V AC/DC max
  • Contact resistance: 10 mΩ max
  • Insulation resistance: 1000 MΩ min
  • Dielectric withstand: 2200 VAC
  • Operating temperature: -40 °C to +105 °C
  • Durability: 30 mating cycles
  • Contact material: copper alloy
  • Housing: high-temperature thermoplastic, UL 94V-0
Schematic symbol check
Flux symbol currently contains six Terminal components with Pin Number values 1 through 6.
Expected for this part:
  • Four electrical contacts/circuits: pins 1, 2, 3, and 4.
  • Two non-electrical retention clip / mounting pads: footprint holes only, or clearly marked as mechanical/NC if represented in the symbol.
Findings:
  • Pin count as a PCB hole count is correct at 6.
  • Electrical symbol has six terminals, which can be misleading because the Molex part has only four electrical circuits. Pins 5 and 6 appear to correspond to retention clips and should not be treated as signal contacts.
  • Pin Type is currently Unspecified for all terminals; electrical pins 1-4 should be passive/connector contacts, and retention clips should be mechanical/NC if kept in the symbol.
  • Pin Description is not populated for any terminal; adding descriptions would improve symbol clarity.
Footprint check
Flux layout contains six pads: 1, 2, 3, 4, 5, and 6. The part also has two additional pad nodes labeled 7 and 8 under a Mounts container in the layout tree, while the project context reports 6 pads.
Expected from the Molex 430450226 sales drawing for 43045-0426:
  • 4 plated through-hole contact pads in a 2 × 2, 3.00 mm pitch / 3.00 mm row-spacing pattern.
  • 2 retention-clip / board-lock holes, outside the contact pattern.
  • 6 PCB holes total for the exact -0426 variant.
Findings:
  • The reported overall 6-pad count matches the part description and sales drawing hole count.
  • The layout tree showing mount pads 7 and 8 in addition to pads 1-6 is inconsistent with the expected 6 total PCB holes. This may be a Flux internal mounting representation, but it should be manually verified against the footprint geometry/drawing before release.
  • The flat layout view did not expose pad geometry, so hole diameters, pad sizes, and exact coordinates could not be fully verified from available tool output.
Datasheet URL issue
The existing Datasheet URL points to 430450224_sd.pdf, which is a 2-circuit sales drawing, not the exact 4-circuit 43045-0426 drawing. Since a datasheet URL was already set, I did not overwrite it under the user's stated condition. Recommended replacement or supplemental references:
Mismatches / issues to resolve
  1. Datasheet URL mismatch: current URL is for 43045-0224 / 2-circuit drawing; exact 43045-0426 should reference the 04-circuit sales drawing and/or product specification.
  2. Symbol over-represents electrical pins: six terminals are present, but only four circuits are electrical; retention clips should be mechanical/NC, not connector contacts.
  3. Pin metadata incomplete: Pin Type is Unspecified and Pin Description is missing for all terminals.
  4. Footprint needs geometry verification: expected 4 contact holes + 2 retention holes; layout tree has possible extra mount nodes 7 and 8 that need confirmation in the footprint editor.
  • Update Datasheet URL to the exact Molex sales drawing for 43045-0426 or add the PS-43045 product specification as a secondary reference if supported.
  • Rename or describe pins 1-4 as connector contacts/circuits.
  • Mark pins 5-6 as mechanical retention clip pads / NC, or remove them from the electrical symbol if Flux supports footprint-only mechanical pads.
  • Verify footprint pad coordinates and hole sizes directly against Molex sales drawing 430450226_sd.pdf before publishing/reuse.

    Project metadata found

    Official references checked

    Key specs from official Molex documentation

    Schematic symbol check

    Footprint check

    Datasheet URL issue

    Mismatches / issues to resolve

    Recommended corrections

Documents

    Part Review: Molex 43045-0426

Assets

43045-0426

43045-0426

43045-0426 Symbol.svgDefault
0430450426-thumb.png

0430450426-thumb.png

0430450426-thumbThumbnail
kicad_mod

43045-0426

43045-04YY_242526.kicad_modFootprint
stp

43045-0426

43045-0426.stp3D Model

0430450426

0430450426 thumbnail
Micro-Fit 3.0 Vertical Header, 3.00mm Pitch, Dual Row, 4 Circuits, with PCB Press-fit Metal Retention Clip Connector Header Through Hole 4 position 0.118" (3.00mm)
The Molex 0430450426 is a 4-position vertical PCB header belonging to the Micro-Fit 3.0 series, designed for compact and reliable power and signal wire-to-board connections. It features a 3.00 mm pitch, through-hole mounting, and a shrouded design for secure mating with compatible receptacles.
This connector is commonly used in applications requiring medium-current power delivery in a compact footprint, such as industrial equipment, automotive electronics, consumer devices, and telecommunications systems. It supports a robust locking mechanism to prevent accidental disengagement and ensures stable electrical performance in vibration-prone environments.
Key Features 4-position vertical PCB header 3.00 mm pitch (Micro-Fit 3.0 family) Through-hole solder termination Shrouded, polarized housing for correct mating Locking ramp / retention feature for secure connection Rated for medium-power applications (varies by wire gauge, up to industrial-level current use cases) Operating temperature range: -40°C to +105°C High-voltage capability (up to ~600 V rating depending on configuration) Suitable for automotive, industrial, medical, and telecom systems Typical Applications Industrial control systems Automotive electronics modules Power supply interconnects Communication equipment Embedded systems and PCB power distribution
#CommonPartsLibrary #Connector #Molex #MicroFit3 #0430450426 #PCBHeader #WireToBoardConnector #PowerConnector #3mmPitch #ElectronicComponents #ConnectorHeader #AutomotiveElectronics #IndustrialConnector

Properties

43045-0426

Molex

Connectors

molex.com/content/dam/molex/molex-dot-com/products/automated/en-us/salesdrawingpdf/430/43045/430450226_sd.pdf

J

PCB

parametric-v1

creativecommons.org/licenses/by/4.0/

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