(private workspace)P355 / Source-observed physical study
I-PEX MHF 4
20449-001E-03
Top view, contact detail omitted · Board header
Not to scale. Technical and rights review pending.
Inspect view & provenance (private workspace)P355 / Micro RF coax / Connector
I-PEX MHF 4 low-profile micro-coaxial RF connector
I-PEX MHF 4 is a distinct low-profile RF family with a 1.2 mm maximum mated height for its documented MHF 4 configuration.
Also called I-PEX MHF4 MHF 4 MHF4 antenna connector MHF 4 receptacle MHF 4 Wi-Fi antenna
MHF 4 names a family, not a universal height for every assembly. Match the receptacle and plug before using a height specification.
Look for
Verify the board receptacle and cable-plug manufacturer part numbers against I-PEX MHF 4 documentation instead of guessing by a tiny snap outline.
Claim inspection dates: 2026-10-09, 2026-10-11, 2026-10-22 · Independent review pending
Three-quarter view Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.
Mating face Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.
Fitted in place Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.
Recognition drawing Original schematic, not to scale. Drawing review pending.
Image inspection / P355
See the view. Check its scope.
1 registered view for this reference. Different part examples are not automatically mates; all remain not to scale and independently unapproved.
(private workspace)Network notes / Miniature RF / P355
Are U.FL, MHF I and MHF 4 the same antenna connector?
No universal interchangeability follows from their small coaxial appearance. Read the named family, cable-plug and board-receptacle codes separately. Other documented MHF 4L pairings have different mated heights. The MHF 4 / MHF 4L statement is a scoped manufacturer pairing, not permission to substitute MHF I, U.FL or any similarly sized antenna lead. C353A · C354A · C354B · C355A · C355B · C355C
| Check | Documented distinction | Boundary |
|---|---|---|
| U.FL is a family | Hirose documents multiple U.FL mated-height variants. C353A | A family-level height range is not a measurement of an unknown loose plug or a universal RF performance rating. |
| MHF I components | I-PEX lists plug 20278-112R-13 for the named 1.13 mm cable example and three-pad board receptacle 20279-001E-03. C354B | The cable diameter and receptacle code qualify this pairing; they do not identify every MHF I variant. |
| MHF 4 components | I-PEX lists plug 20611-001R and board receptacle 20449-001E-03, with a maximum mated height of 1.2 mm for the scoped family. C355A · C355B | Mated height describes the pair, not an independent plug height. MHF 4 is distinct from MHF I. |
| MHF 4L boundary | The MHF 4 / MHF 4L relation is scoped. The retained receptacle drawing lists other MHF 4L pairings at 1.4 or 1.7 mm mated height. C355B · C355C | Do not extend it to MHF I or U.FL, a universal frequency limit, an unknown device or a handling-force instruction. |
- Read the part and the device.
- Read the plug and receptacle part numbers. Similar scale and snap-on appearance do not identify a cross-family mate.
- Keep this requirement open.
- Unknown board receptacle identity, cable plug, installed clearance and compatibility with U.FL or another MHF family remain unqualified.
Keep this limit: Appearance narrows candidates only. Check the exact receptacle, cable assembly, antenna/system requirements and manufacturer handling instructions before any repair; this reference does not approve a substitution. C353A · C354A · C355A · C355B
Explicit source exclusion · named example only
Can a standalone micro-RF receptacle height stand in for every mated assembly?
The retained drawings identify receptacle and named mated-assembly dimensions separately.
Boundary. No universal cross-family clearance or mating is established.
Next check. Match both halves and the dimension’s exact assembly context.
S480 · S481 · C353C (private workspace) · C355C (private workspace)
Before choosing the cable or component
- Identify both halves of the documented I-PEX assembly.
- Check whether the drawing specifies a receptacle dimension or the complete mated pair.
- Use only the equipment-approved assembly and handling process.
Source recheck · 14 October 2026. The U.FL family page and I-PEX product/component tables were re-observed. No connector was measured or mated; family-level frequency and retention claims were not generalized.
Source-qualified reference, not a mating, wiring or repair approval. Each linked claim and source carries its own recorded inspection date and review status; selected reobservations are not independent technical or rights approval.
Source trail: S463 · S465 · S466 · S481.
Miniature RF desk · All eight mechanical checks · Hirose U.FL micro-coaxial RF connector · I-PEX MHF I micro-coaxial RF connector
Read the evidence and its scope · 3 observations
C355A (private workspace) — I-PEX MHF 4 is identified as a 1.2 mm maximum mated-height low-profile micro-coaxial RF family, distinct from MHF I.
Manufacturer-named series/part-number identification only, not generic mating, powered operation, radio performance or electrical safety validation.
C355B (private workspace) — I-PEX identifies MHF 4 plug 20611-001R and receptacle 20449-001E-03; I-PEX explicitly lists MHF 4L as intermateable with MHF 4 under its published series scope.
Manufacturer-named series/part-number identification only, not generic mating, powered operation, radio performance or electrical safety validation.
C355C (private workspace) — I-PEX drawing 20449 gives 1.2 mm maximum mated height for listed MHF 4 plug pairings and 1.4 or 1.7 mm for other listed MHF 4L pairings.
Use the actual plug pairing in the manufacturer table; not a universal height for every intermateable assembly.
Source interpretation is not independent engineering review, hardware testing, wiring advice or a public-release approval.
Visual atlas / Series 02 / P355
Read the physical clue.
What this view supports
- A circular interface on a low-profile board base
- The specified assembly height depends on which listed plug is paired
What remains unknown
No mating-face tolerance, contact geometry or U.FL interchangeability follows. Equal image boxes do not imply equal size.
The next useful check
Use the full 20449 receptacle code and the paired plug row in the manufacturer table.
1 added source-scoped observations
C355C I-PEX drawing 20449 gives 1.2 mm maximum mated height for listed MHF 4 plug pairings and 1.4 or 1.7 mm for other listed MHF 4L pairings.
Use the actual plug pairing in the manufacturer table; not a universal height for every intermateable assembly. Source checked 2026-10-11; independent review pending. S481 · Evidence trail → (private workspace)
Exact source view, limits and rights
Visual inspection 2026-10-11. AI-assisted source inspection; independent drawing and rights reviews pending. These are original qualitative interpretations, not mechanical drawings, pinouts or approved connections.
Independent simplified vector interpretation and original factual paraphrase only. No manufacturer image, PDF, CAD, logo or traced path is redistributed. Independent technical and rights assessment remains pending.
- S481 · I-PEX — 20449 MHF 4 receptacle drawing
Sheet 1 of 7: 20449-001E-03 recommended; receptacle top/side views and mated-height table.
Exact receptacle and plug-dependent assembly-height distinction. Only the exact named source/example supports the observation. No universal mating, wiring, maximum rating or mechanical tolerance is inferred. Drawing 20449 revision 16, 2022-05-27. Publicly linked drawing carries a confidentiality marking; no source bytes or traced geometry are redistributed and rights review stays open.
- S466 · I-PEX — I-PEX MHF 4 product page and part matrix
Product header and MHF 4 RECOMMENDED PART NUMBERS: plug 20611-001R, receptacle 20449-001E-03; 4L note
Identifies I-PEX MHF 4 low-profile parts and explicitly supported MHF 4L mating qualification from I-PEX, not MHF I/U.FL. Only manufacturer-described MHF 4 / 4L intermateability; exact OD, plug/receptacle, height and harness variants require confirmation.
Canonical evidence is retained separately. Existing claim dates are unchanged; only new V118 claims have a new inspection date. No live electrical, energized probing, forced mating or optical-port inspection is recommended.
REPAIR FIELD NOTES / Miniature RF coax & antennas
First verify the exact manufacturer series
MHF 4L intermateability is narrow, not universal
I-PEX explicitly says MHF 4 and MHF 4L can intermate within the documented series scope. This limited maker-specific statement is not permission to substitute MHF I, U.FL or unverified cable-diameter/locking variants. Each selected part still needs a proper mating and installation check.
Avoid: Expanding one official MHF 4L qualification into an endorsement for all miniature snap-on antenna plugs.
Full source-scoped reading and three practical checks ↗
These notes add editorial context to the original canonical reference; they do not change its claim IDs or prove mating, wiring or polarity.
The useful distinction
Recognize it. Then verify it.
I-PEX MHF 4 is a distinct low-profile RF family with a 1.2 mm maximum mated height for its documented MHF 4 configuration. [C355A]
I-PEX identifies MHF 4 plug 20611-001R and receptacle 20449-001E-03; I-PEX explicitly lists MHF 4L as intermateable with MHF 4 under its published series scope. [C355B]
I-PEX drawing 20449 gives 1.2 mm maximum mated height for listed MHF 4 plug pairings and 1.4 or 1.7 mm for other listed MHF 4L pairings. [C355C]
I-PEX MHF 4 manufacturer feature-table family: mated height: 1.2 mm maximum, family mated-configuration feature; cable options: Micro-coax AWG 36, outer diameter 0.81 mm; rf range: Up to 9 GHz; plug VSWR limits are separately tabulated by frequency. Only the I-PEX MHF 4 manufacturer feature-table family feature table; no exact individual part properties or mating approval are established. [C355D]
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.
| Connector role | SMT coaxial RF receptacle (20449-001E-03); Coaxial cable plug (20611-001R)S466Source-scoped examples are separate; select the exact variant and measured axis. 20449-001E-03. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. 20611-001R. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
|---|---|
| Mounting | surface-mount (20449-001E-03)S466Source-scoped examples are separate; select the exact variant and measured axis. 20449-001E-03. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Manufacturer | I-PEX (20449-001E-03)S466Source-scoped examples are separate; select the exact variant and measured axis. 20449-001E-03. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Series | MHF 4 (20449-001E-03)S466Source-scoped examples are separate; select the exact variant and measured axis. 20449-001E-03. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Exact part / implementation | 20449-001E-03 (20449-001E-03); 20611-001R (20611-001R)S466Source-scoped examples are separate; select the exact variant and measured axis. 20449-001E-03. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. 20611-001R. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
Not recorded: Nominal contacts, Positions / cavity span, Populated contacts, Contact rows, Contact pitch, Dimensions / axis, Contact gender / arrangement, Coupling / latch, Keying / polarization, Shell / form, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.
Recorded variant and source limits
- Retained dimensions context (excluded from normalized contact/body field): 2 mm / Manufacturer SMT size / first axis. Source product-specification SMT size, not contact pitch, a mating gauge or the assembled connector height. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. Sources: S466: Product Specifications / SMT Size and Mechanical Lock; Recommended Part Numbers / plug and receptacle; variant-specific mated-height table
- Retained dimensions context (excluded from normalized contact/body field): 2 mm / Manufacturer SMT size / second axis. Source product-specification SMT size, not contact pitch, a mating gauge or the assembled connector height. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. Sources: S466: Product Specifications / SMT Size and Mechanical Lock; Recommended Part Numbers / plug and receptacle; variant-specific mated-height table
Bounded facts, visible unknowns
Specifications and limits
| Documented height | 1.2 mm max. for MHF 4 manufacturer family [C355A] |
|---|---|
| Examples | 20611-001R plug; 20449-001E-03 receptacle [C355B] |
| Mechanical dimensions | Manufacturer describes series- or selected part-specific mated-height values in the sourced text; the drawing contains no usable dimensions or manufacturing tolerance. |
| Engineering pinout | Source-checked engineering profile available; independent review pending. Open engineering profile → |
| Verified device list | Not included. Check exact device and accessory documentation. |
A boundary, not an omission to guess around.
Stop and identify the exact antenna socket and plug with equipment maker documentation; do not probe or force it. Compare I-PEX recommended MHF 4 plug 20611-001R (0.81 mm outside-diameter coax) with receptacle 20449-001E-03; confirm they match the exact application. If an MHF 4L cable or locking variant is involved, use I-PEX’s product matrix and handling instructions before considering that particular mating configuration.
Before you connect
What to check
- Stop and identify the exact antenna socket and plug with equipment maker documentation; do not probe or force it.
- Compare I-PEX recommended MHF 4 plug 20611-001R (0.81 mm outside-diameter coax) with receptacle 20449-001E-03; confirm they match the exact application.
- If an MHF 4L cable or locking variant is involved, use I-PEX’s product matrix and handling instructions before considering that particular mating configuration.
What remains unknown
No blanket MHF I/U.FL cross-mating; I-PEX MHF 4L has its own configurations and must be checked by actual part and mating matrix. Use manufacturer documentation for exact assembly and target equipment before connection.
Your next step
Move from the form to the requirement.
The source trail
Evidence for this page
AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.
Back to first citation ↑
C355ASource checked · pending review
I-PEX MHF 4 is identified as a 1.2 mm maximum mated-height low-profile micro-coaxial RF family, distinct from MHF I.
I-PEX · I-PEX MHF 4 product page and part matrix ↗S466: full source recordInspect review dependencies → (private workspace)Back to first citation ↑
C355BSource checked · pending review
I-PEX identifies MHF 4 plug 20611-001R and receptacle 20449-001E-03; I-PEX explicitly lists MHF 4L as intermateable with MHF 4 under its published series scope.
I-PEX · I-PEX MHF 4 product page and part matrix ↗S466: full source recordInspect review dependencies → (private workspace)Back to first citation ↑
C355CSource checked · pending review
I-PEX drawing 20449 gives 1.2 mm maximum mated height for listed MHF 4 plug pairings and 1.4 or 1.7 mm for other listed MHF 4L pairings.
I-PEX · 20449 MHF 4 receptacle drawing ↗S481: full source recordInspect review dependencies → (private workspace)Back to first citation ↑
Suggest a correction to this field note →C355DSource checked · pending review
I-PEX MHF 4 manufacturer feature-table family: mated height: 1.2 mm maximum, family mated-configuration feature; cable options: Micro-coax AWG 36, outer diameter 0.81 mm; rf range: Up to 9 GHz; plug VSWR limits are separately tabulated by frequency. Only the I-PEX MHF 4 manufacturer feature-table family feature table; no exact individual part properties or mating approval are established.
I-PEX · I-PEX MHF 4 product page and part matrix ↗S466: full source recordInspect review dependencies → (private workspace)Follow the connection
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Candidate selection does not confirm the identity or capabilities of your physical item.
Use this reference
From identity to the right next question
RF & network / Several identities remain possible
A miniature RF socket needs an exact family
Compare the exact manufacturer family and the board-side versus cable-side part.
P353 reference · P355 reference · Inspect named view (private workspace)
An RF family resemblance does not approve a cross-family fit.
RF & network / Unconfirmed candidate
A board receptacle is not a cable-end order number
Keep the named board component separate from the matching cable-assembly requirement.
P355 reference · P353 reference · Inspect named view (private workspace)
The depicted board part does not identify an approved replacement cable.