LED Indication - Discrete

Part Number	Description / PDF	Quantity
APT2012PR54F/A-SC Kingbright	LED BLUE DIFFUSED CHIP SMD	1145
APB3227SYKCGKC Kingbright	LED GREEN/YELLOW CLEAR SMD	0
WP710A10ID Kingbright	LED RED DIFFUSED T-1 T/H	8560
AM2520ZGC03 Kingbright	LED GREEN CLEAR SMD	118
AM2520SGC03 Kingbright	LED GREEN CLEAR SMD	301
APHB1608QBDSYKC Kingbright	LED BLUE/YELLOW CLEAR 4SMD	5947
APHBM2012LVBDSYKJ3C Kingbright	LED BLUE/YELLOW CLEAR 4SMD	0
WP3A9EGWS Kingbright	3MM BI-COLOR RED/GRN LED	440
WP7113SYT Kingbright	LED YELLOW CLEAR T-1 3/4 T/H	0
APB3025SURKCGKC-F01 Kingbright	LED GREEN/RED CLEAR 4SMD	15198
APT1608PYW Kingbright	LED YELLOW DIFFUSED CHIP SMD	0
APDA1806QBC/D Kingbright	LED	5
APF3236LSEEZGKQBKC Kingbright	LED RGB CLEAR 6SMD	2425
APT2012LSYCK/J3-PRV Kingbright	LED YELLOW CLEAR 2SMD	29862
APHBM2012CGKSYKC Kingbright	LED GREEN/YELLOW CLEAR 2012 SMD	0
WP1503YD Kingbright	LED YELLOW DIFFUSED T-1 3/4 T/H	0
WP914EDT Kingbright	LED ORANGE DIFFUSED T/H	0
WP9294SYCK/J3 Kingbright	LED YELLOW CLEAR 5MM ROUND T/H	1998
APA2106SURCK Kingbright	LED RED CLEAR SMD R/A	90389
APTF1616SEEVGAPBAC Kingbright	LED RGB CLEAR 4SMD	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