Part Datasheet Review Summary
Review all available part information (MPN, package, pin count, description, properties). If no datasheet URL is already set, search the web for the official datasheet and update the part's Datasheet property with the URL. Then cross-check the schematic symbol, footprint, and pin descriptions against the datasheet. Summarize key specs and flag any mismatches.
Thought for 7 sec
I’ll verify the part metadata against the official datasheet, update the Datasheet property if needed, then cross-check symbol pins, footprint, and descriptions for mismatches.
Worked for 5 mins 37 sec
Completed the datasheet review for WSLP40261L000FEA. The Datasheet URL was already set to the official Vishay document, so no update was needed.
Open items:
- No electrical or footprint dimensional mismatches found.
- Caveat: the Vishay datasheet does not explicitly number the 4 terminals, so the project’s pin numbering/A-B labels are plausible but not manufacturer-confirmed.
Details are saved in the project document:
part-datasheet-review-wslp40261l000fea.Fix metadata, review outputs
Clarify pin numbering
Run ERC/DRC
Check manufacturing outputs
Add thermal guidance
Part Datasheet Review: WSLP40261L000FEA
Sources
- Project:
adrian95/wslp40261l000fea - Official Vishay datasheet: https://www.vishay.com/doc?30180
- Vishay document number: 30180, revision 02-Jun-2026
Existing Project Metadata Reviewed
- Manufacturer Part Number:
WSLP40261L000FEA - Manufacturer Name:
Vishay Dale - Part Type:
Resistor - Mount:
Surface Mount - Package or Case Code:
WSLP4026 - Designator Prefix:
R - Datasheet URL:
https://www.vishay.com/doc?30180 - Published part UID:
1f8c05ac-cbb4-4972-b8c4-3f9493d3a9d9 - Project description: 1 mΩ ±1%, 7 W, anti-sulfur, AEC-Q200 current sense resistor with 4-terminal Kelvin connections.
The Datasheet URL was already set and points to the official Vishay datasheet, so no property update was required.
Datasheet Key Specifications
- Series / model: Vishay Dale WSLP4026 Power Metal Strip® resistor
- Resistance:
1L000= 0.001 Ω / 1 mΩ - Tolerance:
F= ±1.0% - Packaging code:
EA= lead-free tape/reel - Power rating for 0.5 mΩ to 1 mΩ values: 7 W at 70 °C, subject to PCB thermal design
- Component TCR: ±75 ppm/°C for 0.5 mΩ to 5 mΩ range
- Element TCR: <20 ppm/°C
- Operating temperature range: -65 °C to +170 °C
- Maximum working voltage: limited by √(P × R); for 7 W and 1 mΩ this is about 83.7 mV
- Inductance: very low, 0.5 nH to 5 nH series feature
- Thermal EMF: <3 µV/°C series feature
- Qualification: AEC-Q200 Rev. D qualified
- Sulfur resistance: sulfur-resistant by construction / unaffected by high sulfur environments
- Material for 1 mΩ value: Mn-Cu
- Thermal resistance for 1 mΩ value: 10 °C/W
- Height for 1 mΩ value: 0.1055 in ±0.008 in / 2.68 mm ±0.2 mm
Datasheet Mechanical / Land Pattern Data
Body dimensions, WSLP4026
- L: 0.400 in ±0.008 in / 10.1 mm ±0.2 mm
- W: 0.260 in +0.012/-0.008 in / 6.6 mm +0.3/-0.2 mm
- H for 1 mΩ: 2.68 mm ±0.2 mm
- R ref: 5.0 mm
- S: 0.7 mm ±0.1 mm
- T: 0.4 mm ±0.15 mm
- U: 2.0 mm ±0.15 mm
- N: 0.99 mm ±0.15 mm
Recommended solder pad dimensions, WSLP4026
- a: 5.66 mm
- b: 2.67 mm
- c: 0.69 mm
- d: 0.99 mm
- w: 10.74 mm
Schematic Symbol Cross-Check
The schematic symbol contains 4 terminals:
Table
| Pin | Project description | Position / side | Review |
|---|---|---|---|
| 1 | Current / force terminal A | Left side | Plausible for left force terminal |
| 2 | Current / force terminal B | Right side | Plausible for right force terminal |
| 3 | Kelvin sense terminal B | Right side | Plausible for right Kelvin sense terminal |
| 4 | Kelvin sense terminal A | Left side | Plausible for left Kelvin sense terminal |
The datasheet does not provide explicit numbered terminal/pin assignments for the 4-terminal footprint. Therefore, the project’s A/B and pin-number assignment is a reasonable convention, but it cannot be independently confirmed from the datasheet.
Footprint Cross-Check
The KiCad footprint asset defines:
- Body fab outline: 10.10 mm × 6.60 mm, matching datasheet body dimensions.
- Pad 1: left large pad, 2.67 mm × 5.66 mm.
- Pad 2: right large pad, 2.67 mm × 5.66 mm.
- Pad 3: right small sense pad, 0.99 mm × 2.67 mm.
- Pad 4: left small sense pad, 0.99 mm × 2.67 mm.
- Outer pad span: 10.74 mm, matching datasheet recommended solder pad dimension
w. - 3D model asset:
WSLP40261L000FEA.stppresent.
The footprint dimensions match the datasheet recommended solder pad dimensions and body outline. The footprint contains four SMD pads, consistent with the project’s Kelvin current-sense symbol.
Mismatches / Issues Flagged
- Datasheet does not explicitly number the 4 terminals. The project’s pin numbering and force/sense A/B assignments are plausible and internally consistent, but not directly confirmed by Vishay document 30180.
- The datasheet describes WSLP4026 as a surface-mount Power Metal Strip resistor; it does not explicitly call out a named “4-terminal Kelvin” pinout table in the extracted content. The footprint and symbol implement a 4-pad Kelvin-style land pattern matching the datasheet solder pad geometry.
- No electrical spec mismatch found: project description states 1 mΩ, ±1%, 7 W, anti-sulfur, AEC-Q200; these align with the datasheet for
WSLP40261L000FEA. - No footprint dimensional mismatch found against the datasheet recommended land pattern.
Conclusion
The part metadata, datasheet URL, symbol, footprint geometry, and pin descriptions are generally consistent with the official Vishay datasheet. The only caveat is that the datasheet does not provide an explicit terminal numbering diagram, so pin numbers 1–4 and A/B labels should be treated as a project convention rather than a manufacturer-confirmed numbering scheme.
Sources
Existing Project Metadata Reviewed
Datasheet Key Specifications
Datasheet Mechanical / Land Pattern Data
Body dimensions, WSLP4026
Recommended solder pad dimensions, WSLP4026
Schematic Symbol Cross-Check
Footprint Cross-Check
Mismatches / Issues Flagged
Conclusion