LED Indication - Discrete

Part Number	Description / PDF	Quantity
IN-S124ARUR Inolux	LED RED CLEAR 1204 SMD	14565
IN-S42ATA Inolux	LED AMBER CLEAR 0402 SMD	2740
IN-S42BT5A Inolux	TOP VIEW / 0402 / 1.0X0.5X0.4	0
INL-3AB30 Inolux	LED BLUE CLEAR 3MM T/H	6819
IN-P32DATRG Inolux	LED GREEN/RED CLEAR 4PLCC SMD	18368
HV-5RGB25 Inolux	LED RGB CLEAR 5MM T/H	0
INL-3AR30 Inolux	LED RED CLEAR 3MM T/H	15859
IN-S126TASRGB Inolux	LED RGB CLEAR 1206 SMD R/A	34962
IN-S126ATB Inolux	LED BLUE CLEAR 1206 SMD	2791
IN-S126ATY Inolux	LED YELLOW CLEAR 1206 SMD	1782
INL-5AR30 Inolux	LED RED CLEAR 5MM T/H	0
IN-S42ATUW Inolux	LED WHITE CLEAR 0402 SMD	60781
IN-S85AT5UW Inolux	LED WHITE CLEAR 0805 SMD	470
IN-P32ATR Inolux	LED RED CLEAR 2PLCC SMD	0
IN-S42ATB Inolux	LED BLUE CLEAR 0402 SMD	13481
HTOV511040UTG Inolux	LED GREEN DIFFUSED 5MM OVAL T/H	7423
INL-5AW30 Inolux	LED WHITE CLEAR 5MM T/H	8567
IN-P32ATY Inolux	LED YELLOW CLEAR 2PLCC SMD	0
IN-S85ATYG Inolux	LED YELLOW/GREEN CLEAR 0805 SMD	4918
IN-S121ASR Inolux	LED RED CLEAR 1208 SMD R/A	0

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