LED Indication - Discrete

Part Number	Description / PDF	Quantity
AAA3528RBGS/08-09 Kingbright	LED SMD	3577
WP5603ZGDL/SD/G Kingbright	LED GREEN DIFFUSED 5MM OVAL T/H	13820
AM2520YC03 Kingbright	LED YELLOW CLEAR SMD	0
WP7113VRVC1C Kingbright	LED PINK CLEAR T-1 3/4 T/H	0
APHD1608LVBC/D Kingbright	LED BLUE CLEAR 1608 SMD	2330
WP3VEYW Kingbright	LED RED/YELLOW DIFFUSED T-1 T/H	6251
APFA3010LSEKJ3ZGKQBC Kingbright	LED RGB CLEAR 4SMD R/A	0
WP2060YD Kingbright	LED YELLOW DIFFUSED T/H	0
APBD3224LSYKCGKC Kingbright	LED GREEN/YELLOW CLEAR 4SMD	0
AA3021LZGSK Kingbright	LED GREEN CLEAR SMD	21960
APT2012LSECK/J3-PRV Kingbright	LED RED CLEAR 2SMD	14681
AA2214SYSK Kingbright	LED YELLOW CLEAR SMD	40588
AAA3528SURKCGKC09 Kingbright	LED SMD	0
APHHS1005ZGCK Kingbright	LED GREEN CLEAR CHIP SMD	30258
APDA3020LSECK/J3-PF Kingbright	LED RED CLEAR 2SMD R/A	30779
APHBM2012LVBDSEKJ3C Kingbright	LED BLUE/RED CLEAR 4SMD	3673
APG0603SEC-TT Kingbright	LED ORANGE CLEAR 2SMD	26656
APTB1612LSURKSYKC Kingbright	LED RED/YELLOW CLEAR 4SMD	0
AM23EC-F Kingbright	LED RED CLEAR SOT23-3 SMD	999
WP7113ID5V Kingbright	LED RED DIFFUSED T-1 3/4 T/H	2906

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