LED Indication - Discrete

Part Number	Description / PDF	Quantity
SSL-LX5093BYD Lumex, Inc.	LED YLW DIFF T-1 3/4 BLINKNG T/H	4967
XLUG65D SunLED	LED GREEN DIFFUSED T-1 T/H	0
HLMP-3316 Broadcom	LED RED CLEAR T-1 3/4 T/H	17846
CSM28B2CZ ChromeLED	LED BLUE CLEAR Z-BEND SMD	20
TLHK42S1T2 Vishay / Semiconductor - Opto Division	LED RED CLEAR 3MM T/H	0
HLMP-4000 Broadcom	LED GRN/RED DIFFUSED T-1 3/4 T/H	5892
AA3528QBS/D Kingbright	LED BLUE CLEAR SMD	39498
FLV110	LED RED DIFFUSED T1 3/4 TH	112050
WP7113QBC/G Kingbright	LED BLUE CLEAR T-1 3/4 T/H	1566
QTLP610CYTR Everlight Electronics	LED YELLOW CLEAR SMD R/A	0
150224YS73100A Würth Elektronik Midcom	LED YELLOW CLEAR 2SMD	0
HLMPM551 Everlight Electronics	LED GREEN 4MM T/H	0
XZVG45WT-9 SunLED	LED GREEN CLEAR 2PLCC SMD	1515
SMTL2-RC Califia Lighting (Bivar)	LED RED CLEAR 2PLCC SMD	0
XZMYK53W-8 SunLED	LED YELLOW CLEAR CHIP SMD	80664
SM0603PGC Califia Lighting (Bivar)	LED GREEN CLEAR 0603 SMD	0
QBL8IG30C QT Brightek	LED GREEN T-1 3/4 5MM ROUND T/H	4440
VAOL-S6RP4 Visual Communications Company, LLC	LED RED CLEAR 0603 SMD	362
CLVBA-FKA-CAEDH8BBB7A363 Cree	LED RGB DIFFUSED 4PLCC SMD	63097
LO L29K-J2L1-24-0-2-R18-Z OSRAM Opto Semiconductors, Inc.	LED ORANGE DIFFUSED 0603 SMD	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