IN-S42ATG

Summary

every figure cited to the datasheet below

0402 top-view SMD LED in a clear-lens, PCB-type moulded package — 1.0 × 0.5 × 0.45 mm^{p.1, p.8}
InGaN green emitter — dominant wavelength 525 nm, peak wavelength 523 nm^{p.3, p.7}
Forward voltage 3.3 V typ (4.0 V max) at the 20 mA test current^p.3
Luminous intensity 450 mcd typ at 20 mA (electrical-characteristics table) — the brightest coloured member of the series^p.3
Wide 130° viewing angle (2θ_1/2)^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; 100 mW max power 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

IN-S42ATG is the green member of Inolux's IN-S42AT series: a low-profile 0402 top-view indicator LED in a clear, PCB-type moulded package.^p.1 The die is InGaN^p.7 at a dominant wavelength of 525 nm, and at 450 mcd typ it is the brightest coloured member of the series at the 20 mA test point.^p.3

Forward voltage is 3.3 V typ, up to 4.0 V max^p.3 — on a 3.3 V rail there is zero headroom even for a typical part, so this is a 5 V-rail LED: (5 − 3.3) / 0.02 = 85 Ω for the full 20 mA. Use a current-limiting resistor — the datasheet asks for one explicitly^p.12 — and keep continuous current at or below 25 mA.^p.2 At 450 mcd most status lights want far less than the test current anyway.

The 130° viewing angle^p.3 makes it a wide-angle panel indicator, reverse voltage is rated to only 5 V,^p.2 and InGaN chips are static-sensitive devices.^p.2 One doc quirk: the ordering table lists 360 mcd typical where the electrical table says 450 mcd^{p.7, p.3} — this page quotes the electrical-characteristics value.