You are correct—the footprint dimensions authored in the KiCad footprint are right.
Pads: 1.00 × 1.00 mm
X centers: ±0.925 mm → 1.85 mm pitch (1.00 mm pad + 0.85 mm gap)
Y centers: ±0.625 mm → 1.25 mm pitch (1.00 mm pad + 0.25 mm gap)
These match the datasheet’s recommended land pattern. My earlier statement that the footprint dimensions were incorrect was wrong.
The actual issue is Flux’s computed pad nodes showing the imported dimensions at 0.001× scale—for example, a 1.00 mm pad is reported as 0.001 mm—despite the source footprint containing the correct millimeter values. Separately, the pin assignments still appear swapped: the datasheet drawing indicates pin 4 is common anode and pin 2 is green cathode, while the current terminals identify them oppositely.
I reviewed the datasheet, and my footprint dimensions are correct. Please carefully check the datasheet again and confirm if this is right. correct if necessary
I’ll verify the current pin labels and footprint after your latest edit, then correct only the remaining datasheet mismatches while preserving the footprint geometry.
Confirmed: your footprint is correct and needs no geometry changes.
Four 1.00 × 1.00 mm pads
Pad centers at X = ±0.925 mm, matching the 0.85 mm horizontal gap
Pad centers at Y = ±0.625 mm, matching the 0.25 mm vertical gap
Pin mapping is also now correct: 1 blue cathode, 2 common anode, 3 red cathode, 4 green cathode
The apparent 0.001 mm pad sizes are a Flux readback/unit-scaling artifact, not an error in your embedded KiCad footprint. I made no footprint changes; the renamed pin 2 label ANODE is appropriate.
The part already had a Datasheet URL, so it was not changed under the requested conditional update rule.
Current part information
Table
Field
Current project/library value
Audit result
MPN
SML-LXT0805SIUGUBW
Matches datasheet
Manufacturer
Lumex
Matches datasheet
Description
Standard LEDs - SMD SMT 1.25mm X 2.00mm 632nmR,468nmG,468nmB
Mismatch: green wavelength is 520 nm, not 468 nm. Width is shown as 1.30 mm in the datasheet; 1.25 mm is a common 0805 nominal code but not the drawing dimension.
Terminal count
4
Matches datasheet
Mount
Surface Mount
Matches
Package or Case Code
SMD
Too generic; datasheet identifies an 0805 / approximately 2.00 × 1.30 × 0.50 mm package.
Part Type
Empty
Incomplete; should identify an RGB LED / discrete LED.
Datasheet URL
Datasheet Archive PDF
Present and appears to cover the part, but an official Lumex PDF is available.
Datasheet key specifications
Device: common-anode RGB surface-mount LED, milky white diffused lens.
Package body: 2.00 × 1.30 × 0.50 mm.
Viewing angle: 140°.
Peak wavelength, R/G/B: 632 / 520 / 468 nm.
Forward voltage at 20 mA: minimum 1.6 / 2.7 / 2.7 V; maximum 2.4 / 3.9 / 3.9 V.
Steady forward current: 20 mA per channel.
Peak forward current: 80 mA per channel, pulse condition t < 10 µs.
Electrical pin number/polarity is correct, but the name is misleading. Rename conceptually to COMMON_ANODE or ANODE_RGB.
3
Red cathode
CATHODE_RED
Match
4
Green cathode
CATHODE_GREEN
Match
All four terminals currently have Pin Type = Unspecified and no populated Pin Description. Recommended descriptions are “Blue LED cathode,” “Common RGB anode,” “Red LED cathode,” and “Green LED cathode.” The symbol arrangement places the four pins around the graphic, but the symbol does not explicitly communicate the common-anode topology through terminal naming.
Footprint cross-check
Datasheet recommended land pattern:
Four square SMD pads, each 1.00 × 1.00 mm.
2×2 arrangement.
Horizontal gap between pad columns: 0.85 mm.
Vertical gap between pad rows: 0.25 mm.
Approximate total copper extents: 2.85 × 2.25 mm.
Current project inspection found four pad nodes with the correct logical names/pin mapping, but no explicit pad position, size, shape, or layer data was exposed on those nodes. They appear to inherit the generic pad defaults (1.6 mm circular SMD at position 0), and the flat footprint preview renders the silkscreen body outline but no visible pads. This is a critical footprint mismatch and the part should not be used for PCB manufacturing until the pad geometry is corrected and reverified.
The visible silkscreen outline is approximately 2.00 × 1.30 mm, which is consistent with the package body, but no clear pin-1/polarity marker was confirmed in the rendered preview.
Flagged issues
Critical: Footprint pad geometry/placement is missing or invalid; pads do not match the manufacturer land pattern and do not render in the footprint preview.
Major: Pin 2 is mislabeled ANODE_GREEN; it is the common anode for all three colors.
Major: Description incorrectly states green wavelength as 468 nm; datasheet value is 520 nm.
Moderate: Pin descriptions and electrical pin types are absent/unspecified.
Moderate: Package metadata is too generic (SMD) and omits 0805 / 2.00 × 1.30 × 0.50 mm.
Minor: Current Datasheet URL is not the manufacturer-hosted URL, although it was already populated and therefore was not changed under the request’s condition.
Minor: No unambiguous pin-1/polarity marker was confirmed in the footprint render.
Disposition
An internal part-quality report was filed for the footprint and symbol metadata problems. No symbol or footprint changes were made as part of this review.