by adom
0402 SMD White LED · 3.1 V drop · 25 mA max
3D Model
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README
markdownWhite SMD LED 0402 - Inolux IN-S42ATUW
Inolux Corporation IN-S42ATUW: 0402 SMD White LED, 3.1 V drop, 25 mA max. An Adom Basic Part: Adom keeps it on reels for its pick-and-place line, so boards built with it draw on Adom stock.
Key specs
| Spec | Datasheet |
|---|---|
| 0402 top-view SMD LED in a diffused-lens ('U' lens code), PCB-type moulded package, 1.0 × 0.5 × 0.45 mm | p.1, p.8 |
| InGaN white emitter, no dominant wavelength; specified by CIE chromaticity x = 0.295 / y = 0.30 at 20 mA | p.3, p.7 |
| Chromaticity binned for white, five CIE bins, R27-R31 | p.4 |
| Forward voltage 3.1 V typ (4.0 V max) at the 20 mA test current | p.3 |
| Luminous intensity 600 mcd typ at 20 mA, the brightest member of the series | p.3, p.7 |
| Wide 130° viewing angle (2θ1/2) | p.3 |
| 25 mA max continuous forward current; 100 mA peak at 1/10 duty, 0.1 ms pulse; 5 V max reverse voltage; 100 mW max dissipation | p.2 |
| Operating −30 to +80 °C, storage −40 to +85 °C | p.2 |
| Moisture sensitive and ESD sensitive (InGaN), ships dry-packed in a sealed moisture-barrier anti-static bag | p.2, p.11 |
| Supplied on tape and reel, 5000 pcs per reel | p.9 |
Notes for designers
IN-S42ATUW is the white member of Inolux's IN-S42AT series, and the one variant with a diffused lens, the 'U' in the part number is the lens code. (p.8) The die is InGaN, (p.7) and being white there is no dominant wavelength: the colour is specified as CIE chromaticity x = 0.295 / y = 0.30 (p.3) and binned across five regions, R27-R31. (p.4)
Budget 3.1 V typ (up to 4.0 V max) at the 20 mA test point and it returns 600 mcd, the brightest part in the series. (p.3) The VF spread makes it a 5 V-rail part in practice: (5 − 3.1) / 0.02 = 95 Ω for the full 20 mA, and a backlight or indicator will usually run well below that. Use a current-limiting resistor, the datasheet asks for one explicitly (p.12), and keep continuous current at or below 25 mA. (p.2)
The diffused lens plus 130° viewing angle (p.3) make it a soft, wide-angle source rather than a spot. Reverse voltage is rated to only 5 V, (p.2) and InGaN chips are static-sensitive devices, ESD precautions apply in design and assembly. (p.2)
Footprint
Redrawn from the datasheet land pattern (the previous pads were off by up to 0.2 mm).
Source: Land pattern from Inolux IN-S42AT series datasheet, p.1 (Recommended Solder Pattern).
| mm | Datasheet | KiCad standard (LED_0402_1005Metric) | Previous | This page |
|---|---|---|---|---|
| Pad length (along the part) | 0.4 | 0.59 | 0.6 | 0.4 |
| Pad width | 0.6 | 0.64 | 0.5 | 0.6 |
| Gap between pads | 0.6 | 0.38 | 0.4 | 0.6 |
| Centre to centre | 1 | 0.97 | 1 | 1 |
| Overall | 1.4 | 1.56 | 1.6 | 1.4 |
| Corner radius | not specified | 0.1475 (ratio 0.25) | 0.125 (ratio 0.25) | square (as drawn) |
| Corners: square, as the datasheet draws them. The datasheet does not call for rounded corners, so the footprint does not add any. |
Polarity: pad 1 = K (cathode, -X), pad 2 = A, matching the symbol (K = pin 1, A = pin 2) and the datasheet's cathode mark; the silkscreen bracket marks the cathode end.
Chip outline
The part's 3D outline in the standard pose (pad 1 toward the viewer), drawn from the STEP by Adom's OpenCascade service; the part number sits where the laser-etched mark is on the 3D model and reads the same way.
Symbol options
The default symbol, IN-S42ATUW.kicad_sym (the one in the Symbol & Footprint panel), is the plain standard symbol. IN-S42ATUW-outline.kicad_sym is the same symbol with the part's 3D chip outline drawn beside it, its part number placed and reading as on the 3D model.
Ordering
| MPN | IN-S42ATUW |
| Manufacturer | Inolux Corporation |
| Adom stock | Adom Basic Part, stocked on reels for Adom's pick-and-place line; reel counts on pnp-inventory |
| Other sources | adom-parts-search compares Mouser, DigiKey and JLCPCB |
Downloads
| File | What it is |
|---|---|
| IN-S42ATUW.kicad_sym | KiCad symbol (standard symbol, the page default) |
| IN-S42ATUW-outline.kicad_sym | KiCad symbol with the 3D chip outline |
| IN-S42ATUW.kicad_mod | KiCad footprint (datasheet land pattern) |
| IN-S42ATUW.step | 3D STEP with the part number laser-etched (default) |
| IN-S42ATUW-uncoloured.step | 3D STEP before the colour and etch passes (the bare KiCad model) |
| IN-S42ATUW.glb | 3D GLB of the etched model (board use) |
| IN-S42ATUW.lbr | Fusion 360 / EAGLE library |
| IN-S42ATUW.adom-lbr.json | adom-lbr part (converts to Altium, KiCad, EAGLE) |
| IN-S42ATUW-datasheet.pdf | Datasheet (release asset) |
Provenance
- Datasheet: IN-S42AT series, Top View SMD LED 0402 PCB Type, V1.1 revised V1.1, April 25, 2017 (Format Update); V1.0 initial release 02-07-2017, Inolux Corporation. Manufacturer copy.
md5 0bfcecda84d3ef15fc6776f3c4296d8c - Footprint: Land pattern from Inolux IN-S42AT series datasheet, p.1 (Recommended Solder Pattern). Pads redrawn on 2026-10-03.
- 3D model and symbol: unchanged by the footprint pass; the etched STEP adds a flat virtual part-number mark (an identification aid, not the maker's marking).
- Earlier passes: provenance/ and CHANGES.md.
More
- Datasheet pages: the 14 datasheet pages as images.
- Assembly animation: the part dropping onto its pads, and Adom's pick-and-place picking it from tape.
Symbol & Footprint
Schematic Symbol
Open full view ↗PCB Footprint
Open full view ↗Datasheet
Datasheet (rendered from Markdown)
IN-S42ATUW datasheet
IN-S42AT series, Top View SMD LED 0402 PCB Type, V1.1 revised V1.1, April 25, 2017 (Format Update); V1.0 initial release 02-07-2017, Inolux Corporation.
