LED Indication - Discrete

Part Number	Description / PDF	Quantity
APTD1608LQBC/D Kingbright	LED BLUE CLEAR 1608 SMD	8186
WP7113SECK Kingbright	5MM ORANGE LED	898
AAAF5051-05 Kingbright	LED RGB CLEAR 6SMD	4158
APHD1608LZGCK Kingbright	LED GREEN CLEAR 1608 SMD	3630
APTD1608SECK/J3-PF Kingbright	LED RED CLEAR 2SMD	123910
WP937EGW Kingbright	LED GREEN/RED DIFFUSED T-1 T/H	67190
AM2520SECK09 Kingbright	LED ORANGE CLEAR SMD	14219
APL3015SRCPRV-F01 Kingbright	LED RED CLEAR CHIP SMD	26096
APHB1608ZGKSURKC Kingbright	LED GREEN/RED CLEAR 4SMD	34893
WP113HDT Kingbright	LED RED DIFF RECT 2MMX5MM T/H	1143
APA1606SYCK Kingbright	LED YELLOW CLEAR CHIP SMD R/A	16766
APB3025SYKCGKC-F01 Kingbright	LED GREEN/YELLOW CLEAR SMD	629
APT3216QBC/D Kingbright	LED BLUE CLEAR CHIP SMD	11483
WP7113SECK/J4 Kingbright	LED ORANGE CLEAR T-1 3/4 T/H	1
APHBM2012SURKZGC Kingbright	LED GREEN/RED CLEAR CHIP SMD	85302
APFA2507LQBDSEEZGKC Kingbright	LED RGB CLEAR 4SMD R/A	16111
WP132XGD Kingbright	LED GREEN DIFFUSED T-1 T/H	26760
APD3224QBC/D-F01 Kingbright	LED BLUE CLEAR CHIP SMD	30054
APTD2012LVBC/D Kingbright	LED BLUE CLEAR 2012 SMD	3028
WP154A4SEJ3VBDZGW/CA Kingbright	LED RGB DIFFUSED T-1 3/4 T/H	17425

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