Part Datasheet Audit
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I’m reading the part project’s source-of-truth metadata and pad geometry now, while checking the exact MPN against manufacturer sources.
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Part Datasheet Audit — 0603WAF1001T5E
Current part project metadata and schematic/footprint source. Official UNI-ROYAL Thick Film Chip Resistors datasheet, V.10 (2025-07-28): htt...
Audit complete. The MPN and headline specs are correct: 1 kΩ, ±1%, 0.1 W, ±100 ppm/°C, 0603, two terminals. A datasheet URL was already set, so it was not changed.
Key mismatches:
- Footprint pads differ from UNI-ROYAL’s recommended land pattern.
- Symbol pins are
Unspecifiedrather thanPassive, with no pin descriptions. - Structured Resistance and several rating properties are missing or blank.
Full findings: Part Datasheet Audit — 0603WAF1001T5E.
Fix audit issues
Correct footprint
Improve symbol data
Fill part properties
Use official datasheet
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Part Datasheet Audit — 0603WAF1001T5E
Sources
- Current part project metadata and schematic/footprint source.
- Official UNI-ROYAL Thick Film Chip Resistors datasheet, V.10 (2025-07-28): https://www.uni-royal.cn/en/images/userfile/file/1768283014c56505e6d9ab55c7.pdf
- Existing Datasheet URL property: b14a2231feadfb49523559210ee887e53b093eeb5e4a4ac9d8d49379e6d4be04.pdf
Identity and ordering-code check
- MPN:
0603WAF1001T5E— valid and consistent. - Manufacturer: UNI-ROYAL / Royalohm — consistent.
0603: imperial 0603 / metric 1608 package.WA: 1/10 W (0.1 W).F: ±1% tolerance.1001: 100 × 10¹ Ω = 1 kΩ.T5: tape-and-reel, 5,000 pieces.E: standard lead-free version.- Description correctly states 1 kΩ, ±1%, 0.1 W, ±100 ppm/°C, 0603 SMD.
Key specifications
Table
| Parameter | Datasheet value |
|---|---|
| Resistance | 1 kΩ |
| Tolerance | ±1% |
| Rated power | 0.1 W at 70 °C, derated above 70 °C |
| TCR at 1 kΩ | ±100 ppm/°C |
| Maximum working voltage | 75 V cap; actual continuous voltage is limited by √(P×R), about 10 V at rated power for 1 kΩ |
| Maximum overload voltage | 150 V cap; overload equation limits also apply |
| Dielectric withstand | 300 V |
| Operating temperature | −55 °C to +155 °C |
| Body size | 1.60 ±0.10 × 0.80 ±0.10 × 0.45 ±0.10 mm |
| Terminal dimensions | 0.30 ±0.20 mm nominal on both ends |
| Mounting | Surface mount, tape/reel |
Metadata findings
- Correct: MPN, manufacturer, part type, mount, R0603 package code, two terminals, designator prefix
R, and description. - Datasheet URL is already populated, so no property update was required.
- Missing/incomplete structured properties: the
Resistanceproperty is blank. Power rating, tolerance, TCR, voltage rating, operating-temperature range, and packaging quantity are not represented as structured part properties even though the description encodes several of them. - The stored Datasheet URL is an uploaded copy rather than the current official manufacturer URL. It is usable, but the official URL above is more authoritative and maintainable.
Schematic symbol and pin findings
- Two-terminal resistor topology and pin numbering 1/2 are correct.
- Both terminal
Pin Typevalues areUnspecified; for ERC behavior they should normally bePassive. - Pin descriptions/names are undefined. For a non-polar resistor this does not create an electrical ambiguity, but descriptions such as “Terminal 1” and “Terminal 2” would make the library data complete.
- Symbol is non-polar, as required.
Footprint cross-check
Present footprint
- Body/Fab outline: 1.60 × 0.80 mm — matches nominal body dimensions.
- Two rectangular SMD pads.
- Pad size: 0.90 × 0.95 mm each.
- Pad centers: ±0.80 mm, giving 1.60 mm center-to-center, approximately 0.70 mm inner gap, and 2.50 mm overall copper span.
Official recommended land pattern
- Pad length: 0.65 ±0.05 mm.
- Pad width: 0.80 ±0.05 mm.
- Inner gap: 0.90 ±0.05 mm.
- Datasheet overall dimension is listed as 2.10 ±0.05 mm.
Mismatch
The current pads are larger and closer together than the official recommended land pattern: 0.90 × 0.95 mm versus 0.65 × 0.80 mm, and approximately 0.70 mm gap versus 0.90 mm. This may still solder successfully as a generic 0603 footprint, but it does not match the manufacturer-recommended geometry and increases solder volume/fillet size. The footprint should be corrected or explicitly documented as an intentional alternate land pattern.
Overall result
The part identity and headline electrical specifications are correct. The main actionable issues are incomplete structured properties, unspecified/unnamed symbol terminals, and a footprint land pattern that does not match UNI-ROYAL’s current recommendation.
Sources
Identity and ordering-code check
Key specifications
Metadata findings
Schematic symbol and pin findings
Footprint cross-check
Present footprint
Official recommended land pattern
Mismatch
Overall result
