LED Indication - Discrete

Part Number	Description / PDF	Quantity
APA1606CGCK Kingbright	LED GREEN CLEAR CHIP SMD R/A	68786
AM2520MGC03 Kingbright	LED GREEN CLEAR SMD	0
WP424GDT Kingbright	LED GREEN DIFFUSED T-1 T/H	22824
AA3021VRCBS/A Kingbright	LED CYAN CLEAR SMD	45995
WP424IDT Kingbright	LED RED DIFFUSED T-1 T/H	0
WP7113SGC Kingbright	LED GREEN CLEAR T-1 3/4 T/H	17429
APG0603VGC-TT-5MAV Kingbright	LED GREEN CLEAR 2SMD	27624
WP710A10ND Kingbright	LED ORANGE DIFFUSED T-1 T/H	6020
AA4040QBC/D Kingbright	LED BLUE CLEAR SMD R/A	0
WP710A10ED Kingbright	LED ORANGE DIFFUSED T-1 T/H	0
WP710A10NT Kingbright	LED ORANGE CLEAR T-1 T/H	1454
APHB1608LZGKSURKC Kingbright	LED GREEN/RED CLEAR 4SMD	35437
WP710A10SGD Kingbright	LED GREEN DIFFUSED T-1 T/H	10243
WP59GYW Kingbright	LED GRN/YELLOW DIFF T-1 3/4 T/H	0
APT3216SRCPRV Kingbright	LED RED CLEAR CHIP SMD	57485
AAAF5060QBFSURZGS Kingbright	LED RGB CLEAR SMD	18984
WP7083ZGD/G Kingbright	LED GREEN DIFFUSED T-1 3/4 T/H	9822
AA4040VRBXZ1S/A-2A Kingbright	LED BLUE CLEAR SMD R/A	678
AA4040SYSK Kingbright	LED YELLOW CLEAR SMD R/A	2541
APT2012SECK/J4-PRV Kingbright	LED ORANGE CLEAR CHIP SMD	6988

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