Part Review Mismatch Check
Worked for 6 mins 30 sec
Created a project doc
KUSBX-SMT-CS-4-BK-30TR Part Review
Date: 2026-07-22 Current Flux part/project metadata and schematic terminals
Completed the part review and created the detailed report here: KUSBX-SMT-CS-4-BK-30TR Part Review. The official Kycon datasheet URL was already set, so I left it unchanged; the schematic pin mapping matches the datasheet, but I flagged metadata issues, missing pin descriptions/types, and several footprint dimensions that need verification against the original land-pattern drawing.
Open items:
- Confirm the footprint’s 0.30 mm vs 0.20 mm pad-row widths directly from the Kycon drawing.
- Verify locating/shield hole sizes before using this footprint for production.
- Consider updating terminal
Pin TypeandPin Descriptionmetadata.
Suggested next steps:
- Ask me to correct the part metadata and terminal descriptions.
- Ask me to update the footprint after you confirm the Kycon land-pattern dimensions.
- Ask me to run a manufacturing/footprint readiness review after edits.
Fix metadata and verify
Update terminal metadata
Fix library metadata
Verify footprint dimensions
Run readiness review
Refine this doc
Ask about this doc
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
| Field | Current value |
|---|---|
| Project / part name | KUSBX-SMT-CS-4-BK-30TR |
| MPN | KUSBX-SMT-CS-4-BK-30TR |
| Manufacturer Name property | Kycon |
| Datasheet URL property | https://www.kycon.com/Pub_Eng_Draw/KUSBX-SMT-CS-4-BK-xxTR.pdf |
| Project description | USB-C (USB TYPE-C) USB 4.0 Gen 3 Receptacle Connector 24 Position Surface Mount, Right Angle; Through Hole |
| Part Type property | Connectors |
| Mount property | Surface Mount |
| Designator Prefix | J |
| Flux terminal count | 28 |
| Flux library manufacturer facet | Other |
| Flux library subtype / connector type | RF / Coaxial Connectors |
| Flux library availability | Mouser; lowest listed price $2.88 |
The official Kycon datasheet URL is already set, so no Datasheet URL update was required.
Key Datasheet Specs
Table
| Spec | Datasheet value |
|---|---|
| Manufacturer | KYCON, Inc. |
| Part number | KUSBX-SMT-CS-4-BK-30TR |
| Description | USB 4 Type-C socket, SMT, gold plated, black, tape-and-reel, RoHS, halogen-free |
| Connector type | USB Type-C socket/receptacle |
| Contact count | 24 USB Type-C contacts |
| Total Flux terminals expected with shell | 28 terminals: 24 signal/power contacts + 4 shell/shield contacts |
| Orientation | Horizontal / right-angle receptacle |
| Contact plating | 30 µin gold in contact area, tin in solder area, 50 µin nickel underplate |
| Shield | Stainless steel, 50 µin nickel plated |
| Rated voltage | Datasheet 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 rating | 5 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 resistance | 40 mΩ max |
| Insulation resistance | 100 MΩ min |
| Dielectric withstand | 100 VAC RMS for 1 minute |
| Insertion force | 5 N to 20 N |
| Extraction force | 8 N to 20 N; after 10,000 cycles 6 N to 20 N |
| Durability | 10,000 cycles |
| Operating temperature | -55 °C to +85 °C |
| Compliance | RoHS, halogen-free; insulator UL94V-0 |
| Packaging | Tape & 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
| Pin | Datasheet signal | Flux terminal | Result |
|---|---|---|---|
| A1 | GND | GND_1 | Match |
| A2 | SSTXp1 | SSTXP1 | Match |
| A3 | SSTXn1 | SSTXN1 | Match |
| A4 | VBUS | VBUS_1 | Match |
| A5 | CC1 | CC1 | Match |
| A6 | DP1 | DP1 | Match |
| A7 | DN1 | DN1 | Match |
| A8 | SBU1 | SBU1 | Match |
| A9 | VBUS | VBUS_2 | Match |
| A10 | SSRXn2 | SSRXN2 | Match |
| A11 | SSRXp2 | SSRXP2 | Match |
| A12 | GND | GND_2 | Match |
| B1 | GND | GND_3 | Match |
| B2 | SSTXp2 | SSTXP2 | Match |
| B3 | SSTXn2 | SSTXN2 | Match |
| B4 | VBUS | VBUS_3 | Match |
| B5 | CC2 / VCONN-capable CC contact | CC2 | Match |
| B6 | DP2 | DP2 | Match |
| B7 | DN2 | DN2 | Match |
| B8 | SBU2 | SBU2 | Match |
| B9 | VBUS | VBUS_4 | Match |
| B10 | SSRXn1 | SSRXN1 | Match |
| B11 | SSRXp1 | SSRXP1 | Match |
| B12 | GND | GND_4 | Match |
| S1-S4 | Shell / shield | SHIELD_1..SHIELD_4 | Present; 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 Descriptionproperties. - 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 mmand drill1.21 mm.
- Two non-plated mounting holes are present:
- MH1: drill/size
0.65 mmat x = -3.675 mm, y = -3.235 mm. - MH2: drill/size
1.15 mmat x = 3.675 mm, y = -3.235 mm.
- MH1: drill/size
- 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
| Area | Result |
|---|---|
| Pad count | Matches: 24 SMT contacts + 4 shell terminals = 28 Flux terminals. |
| USB-C pin order | Matches datasheet pin table. |
| SMT pad pitch | Matches: 0.50 mm pitch. |
| SMT pad length | Likely matches: 0.940 mm in footprint vs ~0.94/0.95 mm in datasheet extraction. |
| SMT pad width | Potential 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 holes | Potential 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 holes | Needs 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 outline | Appears broadly consistent with 9.75 mm x ~9.87 mm drawing dimensions. |
Mismatches / Issues to Flag
- Library manufacturer facet mismatch — Flux library metadata reports manufacturer as
Other; should be Kycon. - Connector subtype mismatch — Flux library subtype/connector type reports
RF / Coaxial Connectors; this part is a USB Type-C / USB4 receptacle. - Incomplete terminal metadata — all pins are
Unspecifiedand lackPin Descriptionproperties. - 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.
- Potential mounting-hole mismatch — footprint NPTH holes are 0.65 mm and 1.15 mm; extracted datasheet callout says 2 × Ø0.55 mm.
- Potential shield-hole mismatch — footprint shield drills are 1.21 mm; extracted datasheet callout says 4 × 1.10 ± 0.05 mm shell features/holes.
- 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
