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Contents

Key specs
Notes for designers
Footprint
Chip outline
Symbol options
Ordering
Downloads
Provenance
More

README

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Red SMD LED 0402 - Inolux IN-S42ATR

Inolux Corporation IN-S42ATR: 0402 SMD Red LED, 2.1 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 clear-lens, PCB-type moulded package, 1.0 × 0.5 × 0.45 mm	p.1, p.8
AlInGaP red emitter, dominant wavelength 631 nm, peak wavelength 645 nm	p.3
Forward voltage 2.1 V typ (2.6 V max) at the 20 mA test current	p.3
Luminous intensity 90 mcd typ at 20 mA	p.3, p.7
Wide 130° viewing angle (2θ½)	p.3
25 mA max continuous forward current; 100 mA peak at 1/10 duty, 0.1 ms pulse	p.2
5 V max reverse voltage; 78 mW max power dissipation	p.2
Operating −30 to +80 °C, storage −40 to +85 °C	p.2
Moisture sensitive and ESD sensitive (AlInGaP), ships dry-packed in a sealed
Supplied on tape and reel, 5000 pcs per reel	p.9

Notes for designers

IN-S42ATR is the red member of Inolux's IN-S42AT series: a low-profile 0402 top-view indicator LED in a clear, PCB-type moulded package (p.1). Electrically it is an unremarkable AlInGaP red emitter, which is the point, it is the part you reach for when a board needs a power or status light and nothing about the light itself should be interesting.

Budget 2.1 V across it at the 20 mA test point and it returns 90 mcd (p.3). Drive it through a current-limiting resistor rather than straight off a rail, the datasheet says so explicitly (p.12), and keep continuous current at or below 25 mA (p.2). At 3.3 V that is a (3.3 − 2.1) / 0.02 = 60 Ω resistor for the full 20 mA, and most indicators are happier an order of magnitude dimmer than that.

Two limits are worth remembering because they are tighter than instinct suggests. The 130° viewing angle (p.3) makes this a wide-angle panel indicator, not a directional light source. And reverse voltage is rated to only 5 V (p.2), well under a 12 V rail, so it must never be left reverse-biased across one.

Footprint

Arav's land pattern already matches the datasheet (within 0.02 mm), so the pads are unchanged; only the corners follow the rule below.

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	0.4	0.4
Pad width	0.6	0.64	0.6	0.6
Gap between pads	0.6	0.38	0.6	0.6
Centre to centre	1	0.97	1	1
Overall	1.4	1.56	1.4	1.4
Corner radius	not specified	0.1475 (ratio 0.25)	0.1 (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-S42ATR.kicad_sym (the one in the Symbol & Footprint panel), is the plain standard symbol. IN-S42ATR-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-S42ATR`
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-S42ATR.kicad_sym	KiCad symbol (standard symbol, the page default)
IN-S42ATR-outline.kicad_sym	KiCad symbol with the 3D chip outline
IN-S42ATR.kicad_mod	KiCad footprint (datasheet land pattern)
IN-S42ATR.step	3D STEP with the part number laser-etched (default)
IN-S42ATR-uncoloured.step	3D STEP before the colour and etch passes (the bare KiCad model)
IN-S42ATR.glb	3D GLB of the etched model (board use)
IN-S42ATR.lbr	Fusion 360 / EAGLE library
IN-S42ATR.adom-lbr.json	adom-lbr part (converts to Altium, KiCad, EAGLE)
IN-S42ATR-datasheet.pdf	Datasheet (release asset)

Provenance

Datasheet: IN-S42AT series, Top View SMD LED 0402 PCB Type, V1.1, revised 25 April 2017, 14 pages,. Manufacturer copy. md5 0bfcecda84d3ef15fc6776f3c4296d8c
Footprint: Land pattern from Inolux IN-S42AT series datasheet, p.1 (Recommended Solder Pattern). Pads kept from the previous footprint.
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.

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.