Adom
Components › LEDs › 0402

IN-S42ATUW — White

Inolux Corporation · Top View SMD LED · 0402 (1.0 × 0.5mm) · InGaN
0402 Inolux IN-S42AT RoHS White LED
Chromaticity
CIE
x=0.295, y=0.3
Luminous Intensity
600mcd
@ 20mA
Forward Voltage
3.1V
max 4.0V
Forward Current
25mA
20mA typical
Viewing Angle
130°
2θ½
Power Dissipation
100mW
max rated

Electrical Characteristics

Forward Voltage (typ)3.1V @ 20mA
Forward Voltage (max)4.0V @ 20mA
Reverse Voltage (max)5V
Forward Current (max)25mA
Peak Forward Current100mA (1/10, 0.1ms)
Power Dissipation100mW
Chromaticity (CIE x)0.295
Chromaticity (CIE y)0.3
Luminous Intensity600 mcd @ 20mA
Viewing Angle (2θ½)130°
MaterialInGaN
Lens TypeClear

Operating Conditions

Operating Temp−30°C to +80°C
Storage Temp−40°C to +85°C
ESD SensitivityInGaN — ESD precautions required
PolarityCathode marked on package
⚠ ESD Sensitive Device — InGaN LEDs require proper ESD precautions during handling and assembly. Use grounded wrist straps and ESD-safe workstations.

Package & Dimensions

Top View K (cathode) A 1.0 ± 0.1 0.5 ± 0.1 Side View 0.45 ± 0.1 0402 (1005 metric) Clear lens · InGaN ⚠ Polarized — cathode mark on package indicates negative terminal

Recommended Land Pattern

Pad Width0.4 ± 0.1mm
Pad Height0.6 ± 0.1mm
Pad Spacing (center-to-center)0.6 ± 0.1mm
PolarityCathode marked on PCB

Emission Color

White
Cool White — CIE x=0.295, y=0.3
Blue die + yellow phosphor (InGaN) · Broadband emission · CSS approximation: #F5F5DC

Spectral Distribution

Emission Spectrum — Relative Intensity vs. Wavelength

450nm 555nm Broad phosphor emission 0% 25% 50% 75% 100% Relative Intensity 500 540 580 620 660 700 Wavelength (nm)
White LED emission from InGaN blue die (~450nm) combined with yellow phosphor conversion (~555nm peak). The broad spectral output produces cool white light (CIE x=0.295, y=0.30) with high CRI potential.

Forward Current vs. Forward Voltage

IV Characteristic — the essential curve for circuit design

Typ: 3.1V, 20mA Operating point 4.0V max 25mA max 0 12.5 25 37.5 50 Forward Current (mA) 0.0 1.0 2.0 3.0 4.0 5.0 Forward Voltage (V)
Characteristic exponential IV curve for an InGaN white LED. Near-zero current until threshold (~2.6V), then steep rise. Design point: 3.1V typical at 20mA. Never exceed 4.0V forward or 25mA continuous.

Forward Current Derating

Maximum Forward Current vs. Ambient Temperature

30mA @ 25°C 10mA @ 80°C Safe operating 0 7.5 15 22.5 30 Max If (mA) 0 25 50 80 100 Ambient Temperature (°C)
InGaN LEDs are more thermally stable than AlInGaP types. At 80°C ambient, derate to 10mA. Still requires thermal management in enclosed or high-temperature applications.

Luminous Intensity vs. Forward Current

Relative Brightness (normalized at 20mA)

Linear 1.0 @ 20mA 0 0.5 1.0 1.5 2.0 Relative Brightness 0 10 20 30 40 50 Forward Current (mA)
Brightness increases sublinearly with current. Doubling the current from 20mA to 40mA yields only ~55% more light, not 100%. This means diminishing returns at higher drive currents — optimize for efficiency at or below 20mA.

Luminous Intensity vs. Temperature

Relative Brightness vs. Ambient Temperature (normalized at 25°C)

1.0 @ 25°C Brighter when cold Dimmer when hot 0 0.5 1.0 1.5 2.0 Relative Brightness -30 -10 10 25 50 70 Ambient Temperature (°C)
InGaN LEDs are more thermally stable than AlInGaP types. At 70°C, expect only ~15% reduction in luminous intensity, compared to ~30% for AlInGaP (red/amber). Still brighter when cold (125% at -30°C).

LED Resistor Calculator

⚡ Series Resistor Selection

Volts
Milliamps
Calculated Resistor
10.00 Ω
R = (3.3V - 3.1V) / 20mA
Nearest E24 Value
9.10 Ω
Actual If = 22.0mA
Resistor Power
4.4 mW
P = (Vsupply - Vf) × If
LED Power
68.1 mW
P = Vf × If (max 100mW)
3.3V 9.10Ω LED GND 20mA

Environmental & Handling

ESD Sensitivity
InGaN — ESD precautions required
Use grounded wrist straps & ESD-safe tools
Operating Temperature
Continuous operation range
−30°C to +80°C
Storage Temperature
Unbiased storage
−40°C to +85°C
Moisture Sensitivity
MSL noted in packaging
Follow J-STD-020 bake requirements

Symbol, Footprint & 3D Model

Schematic Symbol
Footprint (0402)
3D Model (interactive)
Click & drag to rotate · Scroll to zoom
Export: KiCad Symbol (.kicad_sym) KiCad Footprint (.kicad_mod) Fusion 360 (.lbr) 3D Model (.step)

Pricing & Availability

Mouser Electronics
—
Check availability
Search on Mouser →
DigiKey
—
Check availability
Search on DigiKey →
JLCPCB / LCSC
—
Check availability

Documents

DatasheetIN-S42AT Series V1.1 (PDF) →
SeriesIN-S42AT
ManufacturerInolux Corporation

Molecule — Single-Passive Board

Interactive 3D Board Viewer
Orbit: click & drag · Zoom: scroll · Inspect: click a component · X-ray: toggle in toolbar
IN-S42ATUW characterization · Data from Inolux IN-S42AT Series V1.1 datasheet + adom-parts-search · 2026-06-03