LED Indication - Discrete

Part Number	Description / PDF	Quantity
IN-S128DATRYG Inolux	LED RED/YLW-GRN CLEAR 1208 SMD	2596
IN-S121ASYG Inolux	LED YLW/GRN CLEAR 1208 SMD R/A	0
INL-3AYG30 Inolux	LED YELLOW/GREEN CLEAR 3MM T/H	9159
IN-P32ATG Inolux	LED GREEN CLEAR 2PLCC SMD	53683
IN-S63AS5UW Inolux	LED WHITE CLEAR 0603 SMD R/A	13689
IN-S63BT5B Inolux	LED BLUE CLEAR 0603 SMD	6190
IN-S85ATG Inolux	LED GREEN CLEAR 0805 SMD	0
IN-S126ASUW Inolux	LED WHITE CLEAR 1206 SMD R/A	4864
IN-S63AT5Y Inolux	LED YELLOW CLEAR 0603 SMD	923
IN-S66TATRGB Inolux	LED RGB CLEAR 0606 SMD	0
HTOV511040UR Inolux	LED RED DIFFUSED 5MM OVAL T/H	1805
IN-S121DAS5R5B Inolux	LED BLUE/RED CLEAR 1210 SMD R/A	2333
IN-P32TATRGB Inolux	LED RGB CLEAR 4PLCC SMD	3627
IN-S121AS5A Inolux	LED AMBER CLEAR 1208 SMD R/A	0
IN-P32ATB Inolux	LED BLUE CLEAR 2PLCC SMD	21692
IN-S126AT5UW Inolux	LED WHITE CLEAR 1206 SMD	7031
INL-3AG30 Inolux	LED GREEN CLEAR 3MM T/H	4836
IN-S124BRUW Inolux	LED WHITE CLEAR 1204 SMD	95268
IN-S126ATG Inolux	LED GREEN CLEAR 1206 SMD	0
IN-S121AS5B Inolux	LED BLUE CLEAR 1208 SMD R/A	1687

LED Indication - Discrete

1. Overview

Discrete Light Emitting Diodes (LEDs) are single-chip optoelectronic devices that convert electrical energy into light through electroluminescence. This product category forms the foundation of modern indication systems, offering advantages including low power consumption, long lifespan, and high reliability. Their importance spans across consumer electronics, industrial equipment, automotive systems, and communication infrastructure.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
Visible LEDs	Emits light in visible spectrum (400-700nm), available in multiple colors	Indicator lamps, display backlighting, decorative lighting
Infrared LEDs	Emits 700nm-1mm wavelength radiation, invisible to human eye	Remote controls, security sensors, night vision systems
High-Brightness LEDs	Enhanced luminous intensity (>1000mcd) with advanced packaging	Automotive lighting, outdoor displays, emergency signage
UV LEDs	Ultraviolet spectrum emission (280-400nm)	Sterilization equipment, counterfeit detection, curing systems

3. Structure and Composition

Typical discrete LED construction includes:

Die: Semiconductor chip (GaN/InGaN for blue/green, AlGaInP for red)
Encapsulation: Epoxy or silicone lens for light extraction and protection
Lead Frame: Copper or iron alloy for electrical connection and heat dissipation
Phosphor Coating: Used in white LEDs for wavelength conversion
Reflective Cup: Optimizes light directionality

4. Key Technical Parameters

Parameter	Significance	Typical Range
Wavelength	Determines light color and application suitability	375nm-940nm
Luminous Intensity	Measures brightness output (mcd)	50-10,000mcd
Forward Current	Operating current rating	20-150mA
Forward Voltage	Electrical potential drop	1.8-3.6V
Viewing Angle	Light emission spread measurement	5 -120

5. Application Fields

Primary application sectors include:

Consumer Electronics: Mobile phone indicators, keyboard backlighting
Automotive: Dashboard indicators, brake light systems
Industrial: Machine status indicators, safety signage
Medical: Diagnostic equipment indicators, phototherapy devices
Telecommunications: Network equipment status lights

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Cree Inc.	XLamp XP-G3	High brightness (3200mcd), 120 viewing angle
OSRAM Opto	OSTAR Projection	High-power LED for automotive lighting
Nichia Corp.	NSHU5991	UV LED (365nm) for curing applications
Everlight Electronics	LTST-C19HE8WT	Tri-color LED for RGB indication

7. Selection Recommendations

Key consideration factors:

Spectral Requirements: Match wavelength to application needs
Environmental Conditions: Temperature range (-40 C to +85 C typical)
Power Constraints: Select appropriate current/voltage ratings
Optical Design: Consider lens type and viewing angle
Reliability: Check MTTF (Mean Time to Failure) specifications

Industry Development Trends

Current technology directions include:

Miniaturization: Development of micro-LED ( LED) with dimensions <50 m
Efficiency Improvement: Targeting >300lm/W efficacy for visible LEDs
Smart Integration: Incorporating driver ICs and sensors in LED packages
Material Innovation: GaN-on-silicon substrates for cost reduction
Regulatory Compliance: RoHS/REACH compliant packaging materials