LED Indication - Discrete

Part Number	Description / PDF	Quantity
APHBM2012LSURKZGKC Kingbright	LED GREEN/RED CLEAR 4SMD	94743
APL3015EC-F01 Kingbright	LED RED CLEAR CHIP SMD	452
AA4040SRS Kingbright	LED RED CLEAR SMD R/A	5189
APBL3025YSGC-F01 Kingbright	LED GREEN/YELLOW CLEAR SMD	12768
APTD3216PBC/A Kingbright	LED BLUE CLEAR 2SMD	1317
AA3528SGS Kingbright	LED GREEN CLEAR SMD	6837
WP7083SED/J3 Kingbright	LED RED DIFFUSED T-1 3/4 T/H	199
WP483IDT Kingbright	LED RED DIFFUSED T-1 3/4 T/H	3894
APHM1608VRBXF/A-5MAV Kingbright	LED BLUE DIFFUSED CHIP SMD	27966
APTD1608LSURCK Kingbright	LED RED CLEAR 1608 SMD	113729
APTR3216PBC/A Kingbright	LED BLUE CLEAR CHIP SMD	208890
APTB1612LVBDSEKJ3C Kingbright	LED BLUE/RED CLEAR 4SMD	0
APTL3216ZGCK-01 Kingbright	LED SMD	4092
APTD3216ZGC Kingbright	LED GREEN CLEAR 2SMD	116384
WP710A10SRC/D Kingbright	LED RED CLEAR T-1 T/H	41084
APHD1608LSURCK Kingbright	LED RED CLEAR 1608 SMD	16873
WP7113ND Kingbright	LED ORANGE DIFFUSED T-1 3/4 T/H	10762
APA2107LVBC/D Kingbright	LED BLUE CLEAR 2SMD R/A	5464
AA3021LVBS/D Kingbright	LED BLUE CLEAR SMD	224
APA2106ZGC/G Kingbright	LED GREEN CLEAR SMD R/A	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