LED Indication - Discrete

Part Number	Description / PDF	Quantity
IN-S63ASR Inolux	LED RED CLEAR 0603 SMD R/A	3325
IN-S63BTR Inolux	LED RED CLEAR 0603 SMD	13262
IN-P32AT5UW Inolux	LED WHITE CLEAR 2PLCC SMD	18642
INL-5AYG30 Inolux	LED YELLOW/GREEN CLEAR 5MM T/H	3878
IN-S63BTYG Inolux	LED YELLOW/GREEN CLEAR 0603 SMD	0
IN-P32ATYG Inolux	LED YELLOW/GREEN CLEAR 2PLCC SMD	1602
IN-S42BT5B Inolux	TOP VIEW / 0402 / 1.0X0.5X0.4	1489
INL-3AA30 Inolux	LED AMBER CLEAR 3MM T/H	1145
IN-S85TATRGB Inolux	LED RGB CLEAR 0805 SMD	0
IN-S63AT5UW Inolux	LED WHITE CLEAR 0603 SMD	186376
IN-S121DASRYG Inolux	LED RED/YLW-GREEN CLR 3210 R/A	0
INL-3AW30 Inolux	LED WHITE CLEAR 3MM T/H	0
INL-5AB30 Inolux	LED BLUE CLEAR 5MM T/H	465
IN-S42BT5UW Inolux	TOP VIEW / 0402 / 1.0X0.5X0.4	0
IN-S126ASG Inolux	LED GREEN CLEAR 1206 SMD R/A	2774
IN-S42ATY Inolux	LED YELLOW CLEAR 0402 SMD	7815
INL-5AY30 Inolux	LED YELLOW CLEAR 5MM T/H	5157
IN-S126AS5B Inolux	LED BLUE CLEAR 1206 SMD R/A	0
IN-S126ATA Inolux	LED AMBER CLEAR 1206 SMD	548
IN-S63AS5B Inolux	LED BLUE CLEAR 0603 SMD R/A	4541

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