E390 · No electrical assignment published

Molex Mini-Fit Jr. connector family engineering reference

Molex 0039012240: coupling: Lock to mating part: yes; keying: Polarized to mating part: yes; keyed to mating part: no; shell: Natural nylon housing. Only Molex 0039012240; no family-wide generalization.

Open field note Source trail

Source checked · no independent review claimed · Fabrication approved: no

Molex Mini-Fit Jr. connector family — original, not-to-scale identification schematic; drawing review pending — **View** Oblique front and topComponent Molex 874272002 · Board headerNot to scale · technical and rights review pending · Inspect this view → (private workspace)
Identification schematic only · not to scale · drawing review pending. No engineering drawing is published for this profile.

Contact count

Not asserted

0039012240 Mini-Fit Jr. receptacle housing example

Mating boundary

Shape is not the verdict.

Use the exact manufacturer mating component, terminal/cable and current drawing. Only Molex 0039012240; no family-wide generalization. A source-described lock, key or dimensional resemblance is not an approved equipment connection.

Orientation

How to read this profile

Textual manufacturer construction/configuration facts and explicitly labelled dimensions only. No mating-face, termination-side, contact-number layout or PCB footprint is reconstructed.

Source-scoped identification facts

Each value retains its exact example, role and measurement axis. Facts from different parts must not be combined into an invented component.

Documented examples; not a mating drawing or compatibility approval
Nominal contacts	20 (Molex 874272002 right-angle PCB header)S468Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Source-checked named manufacturer series or part number only; no unknown-cable compatibility or engineering signoff.
Positions / cavity span	20 (Claim C358A); 24 (Claim C358C)S468 · S573Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Source-checked named manufacturer series or part number only; no unknown-cable compatibility or engineering signoff. V139 Source-scoped identification only. No complete cable assembly, universal mating, pin assignment, safe operating load, installation instruction or independent approval is established.
Contact rows	2 (Claim C358C)S573Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Molex 0039012240 is listed as a natural-color receptacle housing with 24 circuits, two rows and 4.20 mm mating pitch; these are housing-level catalogue fields, not an ATX cable-assembly identity. \| V139 Source-scoped identification only. No complete cable assembly, universal mating, pin assignment, safe operating load, installation instruction or independent approval is established.
Contact pitch	4.2 mm Source-described pitch / centerline (Claim C358A); 4.2 mm Source-described pitch / centerline (Claim C358C)S468 · S573Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Source-checked named manufacturer series or part number only; no unknown-cable compatibility or engineering signoff. V139 Source-scoped identification only. No complete cable assembly, universal mating, pin assignment, safe operating load, installation instruction or independent approval is established.
Connector role	Receptacle connector housing (Molex 0039012240)S573Source-scoped examples are separate; select the exact variant and measured axis. Molex 0039012240. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Contact gender / arrangement	receptacle (Molex 0039012240)S573Source-scoped examples are separate; select the exact variant and measured axis. Molex 0039012240. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Mounting	board (Claim C358A); board (Claim C358B)S468 · S468Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Source-checked named manufacturer series or part number only; no unknown-cable compatibility or engineering signoff.
Coupling / latch	Lock to mating part: yes (Molex 0039012240)S573Source-scoped examples are separate; select the exact variant and measured axis. Molex 0039012240. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Keying / polarization	Polarized to mating part: yes; keyed to mating part: no (Molex 0039012240)S573Source-scoped examples are separate; select the exact variant and measured axis. Molex 0039012240. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Shell / form	Natural nylon housing (Molex 0039012240)S573Source-scoped examples are separate; select the exact variant and measured axis. Molex 0039012240. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Manufacturer	Molex (0039012240)S573Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V139 Source-scoped identification only. No complete cable assembly, universal mating, pin assignment, safe operating load, installation instruction or independent approval is established.
Series	Mini-Fit Jr. (0039012240)S573Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V139 Source-scoped identification only. No complete cable assembly, universal mating, pin assignment, safe operating load, installation instruction or independent approval is established.
Exact part / implementation	0039012240 (0039012240)S573Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V139 Source-scoped identification only. No complete cable assembly, universal mating, pin assignment, safe operating load, installation instruction or independent approval is established.

Not recorded: Populated contacts, Dimensions / axis, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Report a correction to these facts →

Unknowns stay unknown.

The different 874272002 PCB header is excluded; its 20 circuits do not describe this housing.
Polarized is not the same as keyed; the source negative keyed field is preserved. Terminals, populated contact count, equipment pin assignment and approved mating counterpart remain separate.
No numbered electrical contact assignment, hardware test, specimen measurement, fabrication approval or complete application rating/derating is established.

Your next step

Use the detail without guessing past its limits.

Read the connector field note Recognition clues and practical checks.Work through a connection Keep exact equipment and cable requirements separate.

Source trail

Claims and sources

C358Fsource checked

Molex · 0039012240: housing-level identity and independent fields ↗
Physical Specifications: circuits, rows, pitch, gender, color, locking, polarization and keying. The page also displays a Limited Information Available notice. · Source-scoped identification only. No complete cable assembly, universal mating, pin assignment, safe operating load, installation instruction or independent approval is established.

1 source record support this profile. No independent engineering review or hardware validation is claimed.

Evidence behind this page

Scope first. Source second. Approval separate.

1 linked sources · 1 scoped claims · 0 sources with inspection/access flags.

Page scope: No new drawing. Source-scoped original textual normalization only; source images and geometry were not copied or inferred.

Assessment 2026-10-22 · earliest scheduled source review 2027-01-10. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 1 source scopes, access limits and dates

S573 · 0039012240: housing-level identity and independent fields

Molex · Manufacturer / product-owner domain · inspected 2026-10-12 · due 2027-01-10

Within inspection window

Scoped support: An exact named receptacle housing, not a completed ATX harness. Polarized, keyed and locking are separately labelled properties; a positive field is not a wiring or interchangeability verdict.

Not established / limitations: Source-scoped identification only. No complete cable assembly, universal mating, pin assignment, safe operating load, installation instruction or independent approval is established.

Locator: Physical Specifications: circuits, rows, pitch, gender, color, locking, polarization and keying. The page also displays a Limited Information Available notice.

Trace 1 claims to their source records

C358F · P358

Claim scope: Only Molex 0039012240; no family-wide generalization.

Source links: S573 · Evidence trail → (private workspace)

Prepare this page for review →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.