Datasheet Audit
Thought for 1 min 32 sec
The footprint assets identify the intended device as Littelfuse 0452003.NRL, despite the project MPN being only “FUSE.” I’m now validating the official series datasheet and ordering details.
Worked for 2 mins 2 sec
The official Littelfuse datasheet URL is now saved. A significant identity inconsistency surfaced: the underlying part is named 0452005.MRL, while its footprint asset is labeled 0452003.NRL; I’m checking both ratings and the mechanical drawing now.
Worked for 2 mins 26 sec
Created a project doc
Part Datasheet Audit
Backing published part: Littelfuse 0452005.MRL (reported by project mutation/read-back) Project-visible MPN metadata found by indexed inspec...
Audit complete. The official Littelfuse 452/454 datasheet URL is now saved; the intended part is 0452005.MRL, 5 A, 125 V.
Key issues: MPN metadata says
FUSE, the footprint asset is named for 0452003.NRL (3 A), manufacturer/package fields are missing, pin descriptions/types are incomplete, and the pad geometry differs slightly from the recommended land pattern. Full details are in Part Datasheet Audit.Fix metadata and pins
Verify footprint geometry
Run part checks
Report quality issue
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Part Datasheet Audit
Identification
- Backing published part: Littelfuse 0452005.MRL (reported by project mutation/read-back)
- Project-visible MPN metadata found by indexed inspection: FUSE
- Part type: Circuit Protection Devices
- Intended series: Littelfuse 452 Series NANO² Slo-Blo surface-mount fuse
- Official datasheet: https://www.littelfuse.com/assetdocs/fuse-452-and-454-datasheet?assetguid=8c87aa93-80a7-4ea8-8749-a19ba03901c2
- Datasheet URL was missing and has now been saved to the project-level Datasheet URL property.
Key specifications for 0452005.MRL
- Rated current: 5.00 A
- Maximum voltage: 125 V
- Interrupting ratings: 50 A at 125 VAC/VDC, 300 A at 32 VDC, and 100 A at 100 VAC under PSE conditions
- Nominal cold resistance: 0.0136 Ω, measured at 10% rated current and 25 °C
- Nominal melting I²t: 53.72 A²s, calculated at 8 ms
- Operating temperature: -55 °C to +125 °C
- Body: ceramic
- Terminations for the
Lsuffix: gold-plated caps; RoHS compliant and halogen-free - Packaging:
M= 1000 pieces,R= tape and reel,L= RoHS/HF gold-plated caps - Time-current requirements for the series: 100% rating for 4 h minimum; 200% for 1–60 s; 300% for 0.2–3 s; 800% for 0.002–0.1 s
Datasheet mechanical data
- Fuse body: 6.10 ±0.20 mm × 2.69 ±0.25 mm × 2.69 ±0.25 mm
- Recommended land-pattern drawing includes nominal dimensions 6.86 mm, 3.15 mm, 2.95 mm, 1.96 mm, and 1.45 mm.
Symbol review
- Two terminals are present, numbered 1 and 2.
- A fuse is non-polarized, so the two-terminal topology is correct and pin interchangeability is expected.
- Both terminal
Pin Typevalues are Unspecified. Passive is the more descriptive ERC classification. - Both terminals lack
Pin Description; recommended descriptions are Fuse terminal 1 and Fuse terminal 2. - No duplicate or missing pin numbers were found.
Footprint review
- Two rectangular SMD pads are present.
- Inspected pad geometry is approximately 1.8034 mm × 2.6924 mm, with centers at approximately ±2.5019 mm (about 5.0038 mm center-to-center).
- The footprint asset is named
0452003.NRL.kicad_mod, while the backing part is 0452005.MRL. - 0452003.NRL is the 3 A packaging variant; 0452005.MRL is the 5 A packaging variant. Both are in the same 452 package family, so the filename mismatch does not necessarily imply a mechanical mismatch, but it is misleading and can cause BOM/part identity errors.
- The inspected pad geometry does not exactly reproduce the datasheet's nominal recommended land-pattern values. The pad length/width and center spacing appear slightly different. This should be confirmed against the original footprint source and the drawing orientation before production release.
Mismatches and risks
- Critical identity mismatch: visible/indexed MPN is
FUSE, while the backing published part is0452005.MRL. - Asset naming mismatch: footprint file says
0452003.NRL(3 A, 5000-piece reel) but the part is0452005.MRL(5 A, 1000-piece reel). - Missing manufacturer metadata: no explicit Manufacturer Name was found; expected value is Littelfuse.
- Missing package metadata: no explicit Package or Case Code was found; expected family is 452 Series NANO² SMD, body about 6.1 × 2.69 mm.
- Incomplete pin metadata: pin descriptions are absent and pin types are Unspecified rather than Passive.
- Footprint verification warning: pad dimensions/spacing differ modestly from the nominal recommended land pattern extracted from the official datasheet. Verify before manufacturing.
Recommended corrections
- Change Manufacturer Part Number from
FUSEto 0452005.MRL. - Set Manufacturer Name to Littelfuse.
- Set Package or Case Code to a clear 452-Series/NANO² package description.
- Rename or replace the footprint asset so it matches 0452005.MRL, even if the geometry is shared across current ratings.
- Set both pin types to Passive and add terminal descriptions.
- Reconcile the footprint pad geometry directly with the datasheet land-pattern drawing before release.
Identification
Key specifications for 0452005.MRL
Datasheet mechanical data
Symbol review
Footprint review
Mismatches and risks
Recommended corrections
