LED Indication - Discrete

Part Number	Description / PDF	Quantity
WP424SRDT Kingbright	LED RED DIFFUSED T-1 T/H	8700
APTD3216SECK Kingbright	LED ORANGE CLEAR 2SMD	55113
WP7113SRC/DU Kingbright	LED RED CLEAR T-1 3/4 T/H	21355
APA2107SURCK Kingbright	LED RED CLEAR SMD R/A	8287
APTB1615YSGC-F01 Kingbright	LED GREEN/YELLOW CLEAR CHIP SMD	7447
APT1608SYCK Kingbright	LED YELLOW CLEAR CHIP SMD	61383
AM23ESGW Kingbright	LED GRN/RED DIFFUSED SOT23-3 SMD	13916
APTD1608CGCK Kingbright	LED GREEN CLEAR CHIP SMD	416553
WP7113SYTKTNR254 Kingbright	5MM YELLOW LAMP LED ON TNR	40
WP710A10SGC Kingbright	LED GREEN CLEAR T-1 T/H	7846
APTF1616LSEKJ3ZGKQBC Kingbright	LED RGB CLEAR 4SMD	0
APT2012SGC Kingbright	LED GREEN CLEAR CHIP SMD	185774
AA3528QBS/D Kingbright	LED BLUE CLEAR SMD	39498
WP7113QBC/G Kingbright	LED BLUE CLEAR T-1 3/4 T/H	1566
AM2520SECK03 Kingbright	LED ORANGE CLEAR SMD	829
APBL3025ESGC-F01 Kingbright	LED GREEN/RED CLEAR SMD	260937
APT1608VRCXF/A-5MAV Kingbright	LED CYAN DIFFUSED CHIP SMD	2979
APA3010SYCK-GX Kingbright	LED YELLOW CLEAR SMD R/A	2000
APHB1608ZGSURKC Kingbright	LED GREEN/RED CLEAR 4SMD	2549
WP7113SRD5V Kingbright	LED RED DIFFUSED T-1 3/4 T/H	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