Part Metadata Review and Update
Thought for 2 mins 15 sec
I reviewed the part project against the official Würth datasheet and the current project data.
Result
- Datasheet property: already set to the official Würth PDF, so no update was needed.
- Pin count: matches the datasheet: 4 terminals. The sync workflow for part projects is to use the datasheet as the source of truth and ensure the terminal count matches exactly
- Main issues found: missing package metadata, incomplete terminal metadata, and likely symbol labeling mismatch.
Table
| Field | In project | In datasheet | Status |
|---|---|---|---|
| Manufacturer Part Number | 744821039 | 744821039 | OK |
| Manufacturer Name | Würth | Würth Elektronik eiSos GmbH & Co. KG | Acceptable, but could be made more exact |
| Part Type | Inductors | Common mode power line choke | Acceptable |
| Designator Prefix | L | Inductor/choke family | OK |
| Datasheet URL | Official Würth PDF already set | Same | OK |
| Package / Case Code | Missing | XS, through-hole 4-pin | Mismatch / missing |
| Description | WE-CMB Common Mode Power Line Choke Size Typ XS; L = 39 mH; IR = 0.3 A; RDC = 3000 m | WE-CMB Common Mode Power Line Choke, size XS, 39 mH, 0.3 A, 3000 mΩ | Needs cleanup |
Table
| Parameter | Value |
|---|---|
| Series | WE-CMB |
| Exact MPN | 744821039 |
| Manufacturer | Würth Elektronik eiSos GmbH & Co. KG |
| Part type | Common mode power line choke |
| Size / case | XS |
| Mounting | Through-hole |
| Windings | 2 |
| Terminal count | 4 |
| Inductance | 39 mH ±30% @ 10 kHz / 0.1 mA |
| Rated current | 0.3 A max |
| DC resistance | 3000 mΩ max @ 20 °C |
| Rated voltage | 250 V AC max @ 50 Hz |
| Insulation test voltage | 1500 V AC @ 50 Hz / 5 mA / 2 s |
| Ambient temp at rated current | -40 to +70 °C |
| Operating temperature | -40 to +125 °C |
The datasheet shows two windings:
- Winding 1: pins 1-2
- Winding 2: pins 4-3
It also shows the physical pin layout as:
- top row: 4, 2
- bottom row: 3, 1
Table
Table
| Area | Finding | Severity |
|---|---|---|
| Terminal metadata | All four terminals have Pin Type = Unspecified | Medium |
| Terminal labels | Schematic designators are just 1, 2, 3, 4 instead of functional terminal naming | Low |
| Pin descriptions | No pin descriptions present | Medium |
| Package metadata | Package or Case Code is missing; datasheet says XS | Medium |
| Description text | RDC = 3000 m appears truncated; should be 3000 mΩ or 3.0 Ω equivalent | Low |
| Manufacturer name precision | Project says Würth; datasheet gives full manufacturer name | Low |
For a simple passive magnetic like this one, the part-project sync guidance says not to invent pin data, and to ensure exact pin-number matching from the datasheet before assigning any metadata
Symbol assessment
- The pin numbering is consistent with the datasheet.
- The winding pairing is not captured explicitly in the current symbol metadata.
- The datasheet does not explicitly expose polarity dots in the extracted text, so I would not assign dot/start-finish semantics unless you want me to verify from the graphical figure manually.
- Because all terminals are generic and unnamed, the symbol is technically usable but not very descriptive.
From the project index:
- Footprint asset: WE-CMB_XS5.kicad_mod
- 3D model asset: 744821039.stp
- Pad count: 4
From the datasheet:
- Recommended hole pattern: 10.0 mm x 4.5 mm
- Hole diameter: Ø1.1 mm
So the high-level footprint check looks consistent:
- 4 pads present
- Pin numbering 1-4 present
- Footprint family naming aligns with the part size
What I could not fully verify from the currently exposed project data is:
- exact pad copper diameter
- exact pad shape
- exact XY pad coordinates
So I can say the footprint appears plausibly matched, but not fully dimension-verified down to pad geometry.
Overall verdict
Summary
Table
| Category | Verdict |
|---|---|
| MPN | OK |
| Datasheet URL | OK |
| Pin count | OK |
| Pin numbering | OK |
| Winding pairing | Datasheet known, not clearly expressed in symbol metadata |
| Footprint family match | Likely OK |
| Footprint exact geometry | Partially verified only |
| Part metadata completeness | Incomplete |
| Symbol metadata completeness | Incomplete |
- Add
Package or Case Code = XS - Normalize manufacturer name to the full datasheet name
- Fix the description text so resistance is clearly 3000 mΩ
- Add terminal descriptions such as:
- Optionally rename the terminals to make the winding pairs clearer
If you want, I can make those metadata fixes in the part project next.
Fix part metadata
Verify footprint dimensions
Run full part review
