LED Indication - Discrete

Part Number	Description / PDF	Quantity
EAST2012WA1 Everlight Electronics	PCB TOP VIEW SMD LED WHITE	10067
QTLP630C4TR Everlight Electronics	LED GREEN CLEAR 0805 SMD	12234
19-217/R6C-AL1M2VY/3T Everlight Electronics	LED RED CLEAR 2SMD	2959
MV5439A Everlight Electronics	LED GREEN/RED DIFF 3 LEAD T/H	3792
EASV3015RWA0 Everlight Electronics	LED RED/WHITE DIFFUSED 3SMD R/A	0
QTLP601C4TR Everlight Electronics	LED GREEN CLEAR 0603 SMD	4284
EAST16083RA1 Everlight Electronics	LED RED CLEAR 2SMD	5110
HLMP-K150 Everlight Electronics	LED RED DIFFUSED T-1 T/H	22960
EAST1410RGBW02 Everlight Electronics	SIGNAGE RGBW PCB TOP VIEW SMD LE	5667
EASV2010BRA0 Everlight Electronics	LED BLUE/RED CLEAR 4SMD R/A	15820
MV8191 Everlight Electronics	LED RED DIFFUSED T-1 3/4 T/H	921
QTLP600CBTR Everlight Electronics	LED BLUE CLEAR 0603 SMD	335
HLMP1440 Everlight Electronics	LED YELLOW CLEAR T-1 T/H	2756
QTLP600C4TR Everlight Electronics	LED GREEN CLEAR SMD	84
5484BN-R7DC-AHJB-PR-MS Everlight Electronics	LED RED DIFFUSED T/H	121
19-217/B7C-ZL2N1B3X/3T Everlight Electronics	LED BLUE CLEAR 2SMD	12260
EAST16084BA0 Everlight Electronics	LED BLUE CLEAR 2SMD	12396
HLMP3300 Everlight Electronics	LED RED DIFFUSED T-1 3/4 T/H	6311
MV53124A Everlight Electronics	LED YELLOW DIFFUSED T/H	1699
7344-15SUGC/S400-X6 Everlight Electronics	LED GREEN CLEAR 5MM ROUND 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