LED Indication - Discrete

Part Number	Description / PDF	Quantity
BRPG1204W-TR Stanley Electric	LED GREEN/RED CLEAR SMD	34505
XLM2MOK01W SunLED	LED ORANGE CLEAR 10MM T/H	0
5990130007F Dialight	LED ORANGE 0805 SMD	4442
LTST-C250KRKT Lite-On, Inc.	LED RED CLEAR CHIP SMD	0
NTE30106 NTE Electronics, Inc.	LED-RED/YEL_GRN 5MM 3LEAD	3130
WP793GD Kingbright	LED GREEN DIFFUSED 8MM ROUND T/H	3093
VLMY31K1L2-GS08 Vishay / Semiconductor - Opto Division	LED YELLOW CLEAR 2PLCC SMD	0
VCKB1111CS-TR Stanley Electric	LED BLUE SMD	4837
VLMK31R1S1-GS18 Vishay / Semiconductor - Opto Division	LED RED CLEAR 2PLCC SMD	0
APG0603ZGC-5MAV Kingbright	0.6X0.3MM GREEN SMD LED	4000
150283HS73103 Würth Elektronik Midcom	WL-SMTW SMT MONO-COLOR TOP LED W	3934
LS L296-N2Q1-1-Z OSRAM Opto Semiconductors, Inc.	LED RED DIFFUSED 0603 SMD	0
AA3528CGSK Kingbright	LED GREEN CLEAR SMD	17846
QBL8AG60D QT Brightek	LED YELLOW GREEN 5MM ROUND T/H C	277
C5SMF-BJE-CR14Q3T1 Cree	LED BLUE CLEAR 5MM OVAL T/H	0
LNJ808K87RA Panasonic	LED ORANGE SS TYPE LED SMD	7386
IN-S85ATR Inolux	LED RED CLEAR 0805 SMD	0
WP63GT Kingbright	LED GREEN CLEAR T-1 3/4 T/H	0
VLME23R2T1-GS08 Vishay / Semiconductor - Opto Division	LED YELLOW CLEAR SMD MINILED SMD	0
L196L-QBC-L American Opto Plus LED Corp.	0603 BLUE SMD LED -5MA	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