Part Review Mismatch Check

C

cherepanyadima

https://linear.app/buildwithflux/issue/FLUX-13677/part-quality-issue-kusbx-smt-cs-4-bk-30tr
Kycon USB-C receptacle part metadata appears incorrect/incomplete: library manufacturer facet is 'Other' despite Manufacturer Name=Kycon, connector subtype is RF/Coaxial instead of USB Type-C, all terminals have Pin Type=Unspecified and no Pin Description.
check and correct if necessary according to the datasheet

flux

I’ll verify the manufacturer/category and every terminal’s electrical type and description against Kycon’s datasheet, then correct the part metadata where the platform permits and re-check the result.

flux

I found the reported issue scope and am now reading the live part properties and all 28 terminals before applying corrections.

flux

The live part confirms all terminal electrical types are currently unspecified and descriptions are absent. I’m mapping each contact and shield pin to datasheet-correct metadata next.

flux

All 28 terminals now have passive connector pin types and functional descriptions; I also corrected the public part description. I’m doing the final read-back and checking whether the manufacturer/subtype facets are editable from the part project.

flux

Corrected all 28 terminals to Passive and added USB Type-C functional pin descriptions; also updated the part description to accurately identify the Kycon USB 4 Type-C receptacle.
  • Confirmed correct: MPN, Kycon manufacturer property, 24 USB contacts + 4 shield tabs, datasheet URL, and pin assignments.
  • Still incorrect: Library-index facets remain Manufacturer: Other and RF / Coaxial Connectors. These generated fields are not editable from the part project and should be corrected under the linked FLUX-13677 ticket to Kycon and USB Type-C connector.
  • The library search index still shows the old description, likely pending republish/reindex.
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KUSBX-SMT-CS-4-BK-30TR Part Review
Date: 2026-07-22
Sources Checked
  • Current Flux part/project metadata and schematic terminals
  • Current Flux footprint KiCad asset embedded in the PCB layout
  • Flux library search result for KUSBX-SMT-CS-4-BK-30TR
  • Datasheet URL already set on the part:
  • Datasheet extraction from Kycon drawing KUSBX-SMT-CS-4-BK-xxTR
Current Flux Part Information

Table

FieldCurrent value
Project / part nameKUSBX-SMT-CS-4-BK-30TR
MPNKUSBX-SMT-CS-4-BK-30TR
Manufacturer Name propertyKycon
Datasheet URL propertyhttps://www.kycon.com/Pub_Eng_Draw/KUSBX-SMT-CS-4-BK-xxTR.pdf
Project descriptionUSB-C (USB TYPE-C) USB 4.0 Gen 3 Receptacle Connector 24 Position Surface Mount, Right Angle; Through Hole
Part Type propertyConnectors
Mount propertySurface Mount
Designator PrefixJ
Flux terminal count28
Flux library manufacturer facetOther
Flux library subtype / connector typeRF / Coaxial Connectors
Flux library availabilityMouser; lowest listed price $2.88
The official Kycon datasheet URL is already set, so no Datasheet URL update was required.
Key Datasheet Specs

Table

SpecDatasheet value
ManufacturerKYCON, Inc.
Part numberKUSBX-SMT-CS-4-BK-30TR
DescriptionUSB 4 Type-C socket, SMT, gold plated, black, tape-and-reel, RoHS, halogen-free
Connector typeUSB Type-C socket/receptacle
Contact count24 USB Type-C contacts
Total Flux terminals expected with shell28 terminals: 24 signal/power contacts + 4 shell/shield contacts
OrientationHorizontal / right-angle receptacle
Contact plating30 µin gold in contact area, tin in solder area, 50 µin nickel underplate
ShieldStainless steel, 50 µin nickel plated
Rated voltageDatasheet extraction returned 48 V from current Kycon OCR; distributor mirror text shows 30 V in an older/preliminary extraction. Verify against the current PDF before relying on voltage rating.
Current rating5 A collectively on VBUS pins A4/A9/B4/B9; 5 A collectively on GND pins A1/A12/B1/B12; 1.25 A on B5/VCONN; 0.25 A all other pins
Contact resistance40 mΩ max
Insulation resistance100 MΩ min
Dielectric withstand100 VAC RMS for 1 minute
Insertion force5 N to 20 N
Extraction force8 N to 20 N; after 10,000 cycles 6 N to 20 N
Durability10,000 cycles
Operating temperature-55 °C to +85 °C
ComplianceRoHS, halogen-free; insulator UL94V-0
PackagingTape & Reel
Schematic Symbol / Pin Mapping Check
The schematic terminal names and pin-number assignments match the USB Type-C pin table in the datasheet.

Table

PinDatasheet signalFlux terminalResult
A1GNDGND_1Match
A2SSTXp1SSTXP1Match
A3SSTXn1SSTXN1Match
A4VBUSVBUS_1Match
A5CC1CC1Match
A6DP1DP1Match
A7DN1DN1Match
A8SBU1SBU1Match
A9VBUSVBUS_2Match
A10SSRXn2SSRXN2Match
A11SSRXp2SSRXP2Match
A12GNDGND_2Match
B1GNDGND_3Match
B2SSTXp2SSTXP2Match
B3SSTXn2SSTXN2Match
B4VBUSVBUS_3Match
B5CC2 / VCONN-capable CC contactCC2Match
B6DP2DP2Match
B7DN2DN2Match
B8SBU2SBU2Match
B9VBUSVBUS_4Match
B10SSRXn1SSRXN1Match
B11SSRXp1SSRXP1Match
B12GNDGND_4Match
S1-S4Shell / shieldSHIELD_1..SHIELD_4Present; shell contacts are not in the USB pin table but are present in the footprint
Symbol Metadata Gaps
  • All 28 terminals have Pin Type: Unspecified.
  • Terminals do not have populated Pin Description properties.
  • This does not appear to break the pin mapping, but it reduces ERC usefulness and makes the part less self-documenting.
Footprint Check
Existing Flux Footprint Summary
From the embedded KiCad footprint asset:
  • 24 SMT signal/power pads are present: A1-A12 and B1-B12.
  • All 24 SMT pads are rectangular 0.300 mm × 0.940 mm.
  • Contact pitch is 0.50 mm.
  • A-row pads are at y = -3.775 mm; B-row pads are at y = -2.155 mm; row separation = 1.620 mm.
  • Four shield/shell plated through-hole pads are present: S1-S4.
    • S1/S2 at x = ±4.125 mm, y = -1.985 mm.
    • S3/S4 at x = ±4.490 mm, y = 2.405 mm.
    • Each has circular pad size 1.815 mm and drill 1.21 mm.
  • Two non-plated mounting holes are present:
    • MH1: drill/size 0.65 mm at x = -3.675 mm, y = -3.235 mm.
    • MH2: drill/size 1.15 mm at x = 3.675 mm, y = -3.235 mm.
  • Fab outline is approximately 9.75 mm × 9.87 mm, consistent with main body dimensions in the drawing.
Datasheet Land Pattern Extract
Datasheet/OCR extraction indicates:
  • 24 contacts total.
  • 0.50 mm pitch.
  • 12 pads/features at 0.30 ± 0.03 mm.
  • 12 pads/features at 0.20 mm.
  • Pad length/depth around 0.94 / 0.95 ± 0.05 mm.
  • Two holes called out as 2 × Ø0.55 mm.
  • Four shell features called out as 4 × 1.10 ± 0.05 mm.
  • Drawing is top view; use connector front edge as the datum.
Footprint Findings

Table

AreaResult
Pad countMatches: 24 SMT contacts + 4 shell terminals = 28 Flux terminals.
USB-C pin orderMatches datasheet pin table.
SMT pad pitchMatches: 0.50 mm pitch.
SMT pad lengthLikely matches: 0.940 mm in footprint vs ~0.94/0.95 mm in datasheet extraction.
SMT pad widthPotential mismatch: footprint uses 0.300 mm width for all 24 SMT pads, while the datasheet extraction indicates 12 × 0.30 mm and 12 × 0.20 mm. Verify on the original drawing whether the 0.20 mm callout is a PCB land width or contact-tail/mechanical feature before changing.
Mounting / locating holesPotential mismatch: datasheet extraction indicates 2 × Ø0.55 mm holes, but footprint uses 0.65 mm and 1.15 mm NPTH holes. The 1.15 mm hole is especially suspicious unless the connector has asymmetric locating posts not captured by OCR.
Shield/shell holesNeeds verification: datasheet extraction indicates 4 × 1.10 ± 0.05 mm shell features; footprint uses 1.21 mm drills with 1.815 mm circular pads. This may be intentional drill/plating compensation, or it may be oversized.
Fab/body outlineAppears broadly consistent with 9.75 mm x ~9.87 mm drawing dimensions.
Mismatches / Issues to Flag
  1. Library manufacturer facet mismatch — Flux library metadata reports manufacturer as Other; should be Kycon.
  2. Connector subtype mismatch — Flux library subtype/connector type reports RF / Coaxial Connectors; this part is a USB Type-C / USB4 receptacle.
  3. Incomplete terminal metadata — all pins are Unspecified and lack Pin Description properties.
  4. Potential SMT pad-width mismatch — footprint uses 24 identical 0.300 mm-wide signal pads; the datasheet extraction indicates one row may need 0.20 mm-wide pads.
  5. Potential mounting-hole mismatch — footprint NPTH holes are 0.65 mm and 1.15 mm; extracted datasheet callout says 2 × Ø0.55 mm.
  6. Potential shield-hole mismatch — footprint shield drills are 1.21 mm; extracted datasheet callout says 4 × 1.10 ± 0.05 mm shell features/holes.
  7. Rated voltage discrepancy in extracted sources — current datasheet extraction returned 48 V, while a distributor mirror / older drawing extraction shows 30 V. Confirm directly from the latest Kycon PDF before using the voltage rating in downstream design rules.
Recommendation
Do not change the pin mapping; it matches the datasheet. Before using this part for production layout, verify the original Kycon land-pattern drawing visually and correct the footprint if the 0.20 mm pad row, Ø0.55 locating holes, or 1.10 mm shell holes are confirmed. Also update part metadata so the manufacturer/subtype and terminal pin descriptions/types are accurate.

  • Sources Checked

  • Current Flux Part Information

  • Key Datasheet Specs

  • Schematic Symbol / Pin Mapping Check

  • Symbol Metadata Gaps

  • Footprint Check

  • Existing Flux Footprint Summary

  • Datasheet Land Pattern Extract

  • Footprint Findings

  • Mismatches / Issues to Flag

  • Recommendation