LED Indication - Discrete

Part Number	Description / PDF	Quantity
WP5603SIDL/SD/J3 Kingbright	LED RED DIFFUSED 5MM OVAL T/H	7250
AA3021ES Kingbright	LED RED CLEAR SMD	5127
WP7113SRD/J4 Kingbright	LED RED DIFFUSED T-1 3/4 T/H	5418
AA3528YS Kingbright	LED YELLOW CLEAR SMD	13246
APA2107QBC/D Kingbright	LED BLUE CLEAR SMD R/A	0
APT3216LSYCK/J3-PRV Kingbright	LED YELLOW CLEAR 2SMD	0
WP113GDT Kingbright	LED GREEN DIFF RECT 2MMX5MM T/H	45317
APT1608PGW Kingbright	LED GREEN DIFFUSED CHIP SMD	0
WP133IDT Kingbright	LED RECT 2MMX5MM T/H	0
WP813YD Kingbright	LED YELLOW DIFFUSED 10MM T/H	0
AAAF3529SEKJ3ZGKQBKS Kingbright	LED RGB CLEAR 6SMD	0
WP793SRC/D Kingbright	LED RED CLEAR 8MM ROUND T/H	0
WP813ED Kingbright	LED ORANGE DIFFUSED 10MM T/H	0
WP36BID Kingbright	LED RED DIFFUSED T-1 T/H	0
APETD3528ZGC Kingbright	LED GREEN CLEAR CHIP SMD	0
APETD3528SEC/J3-PRV Kingbright	LED RED CLEAR CHIP SMD	0
AA3528SURCKT09 Kingbright	LED SMD	0
WP169XGD Kingbright	LED GREEN DIFFUSED RECT T/H	0
AA3528SECKT09 Kingbright	LED ORANGE CLEAR SMD BOTTOM ENT	1631
AP3216SYC Kingbright	LED YELLOW CLEAR 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