LED Indication - Discrete

Part Number	Description / PDF	Quantity
5972201818F Dialight	LED YELLOW CLEAR 1616 SMD R/A	0
LTL42UB6N Lite-On, Inc.	LED BLUE CLEAR T-1 T/H	4718
HSMA-A431-X90M1 Broadcom	LED AMBER CLEAR 4PLCC SMD	0
APHBM2012SURKZGC Kingbright	LED GREEN/RED CLEAR CHIP SMD	85302
SSL-LXA3025YGC-TR Lumex, Inc.	LED GREEN/YELLOW CLEAR AXIAL SMD	0
C566C-AFE-CU0W0252 Cree	LED AMBER CLEAR 5MM OVAL T/H	0
SM0605BC-R/B Califia Lighting (Bivar)	LED BLUE/RED CLEAR 0605 SMD	1008
NTE30058 NTE Electronics, Inc.	LED-8MM BLUE	996
SML-512WWT86 ROHM Semiconductor	LED YELLOW DIFFUSED 0603 SMD	2561
APFA2507LQBDSEEZGKC Kingbright	LED RGB CLEAR 4SMD R/A	16111
SMS1105YC Califia Lighting (Bivar)	LED YELLOW CLEAR 2PLCC SMD R/A	22608
L150B-LOC-TR American Opto Plus LED Corp.	3.2X1.6X1.1MM SMD LED ORANGE	100
XZMECBDDG45SHTA SunLED	3.5X2.8MM RGB FULL COLOR PLCC SM	1963
ASMD-CWG7-NX7G2 Broadcom	3014 DFN 0.1W WHITE WSURFACE NIM	87682
XZURMG62W-1 SunLED	LED GREEN/RED CLEAR 4SMD	0
TLHY4400-AS12Z Vishay / Semiconductor - Opto Division	LED YELLOW DIFFUSED T-1 T/H	0
SML-LX0402SOC-TR Lumex, Inc.	LED ORANGE CLEAR SMD	55368
5973305607F Dialight	LED GREEN CLEAR SMD	4210
L955MOC-S American Opto Plus LED Corp.	3.5X2.8X 1.9MM PLCC2 SMD ORANGE	10
XLVG12D SunLED	5MM GREEN LED	427

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