LED Indication - Discrete

Part Number	Description / PDF	Quantity
VAOL-5701WY4 Visual Communications Company, LLC	LED WHITE CLEAR T/H	405
CMDA5DY7D1S Visual Communications Company, LLC	LED AMBER DIFFUSED 0805 SMD	17397
CMDA19AY7D1S Visual Communications Company, LLC	LED GREEN DIFFUSED 0603 SMD	5817
4304H6 Visual Communications Company, LLC	LED BLUE DIFFUSED T-1 3/4 T/H	0
VAOL-5701SBY4 Visual Communications Company, LLC	LED BLUE CLEAR T/H	3331
4308H7 Visual Communications Company, LLC	LED YELLOW CLEAR T-1 3/4 T/H	0
4301H1/5 Visual Communications Company, LLC	LED GRN/RED DIFFUSED T-1 3/4 T/H	4374
LSM0805452V Visual Communications Company, LLC	LED SM 0805 2V 35MCD GREEN	2582
4301H1/1 Visual Communications Company, LLC	LED RED DIFFUSED T-1 3/4 T/H	694
LTH5MM12VFR4700 Visual Communications Company, LLC	LED YELLOW CLEAR T-1 3/4 T/H	621
CMD15-21VRC/TR8 Visual Communications Company, LLC	LED RED CLEAR 1206 SMD	20815
4302H1-5V Visual Communications Company, LLC	LED RED DIFFUSED T-1 3/4 T/H	706
LTH3MM12VFR4600 Visual Communications Company, LLC	LED BLUE CLEAR T-1 T/H	860
CMD6722SRUGCTR8 Visual Communications Company, LLC	LED GREEN/RED CLEAR SMD	2476
LTH3MM12VFR4100 Visual Communications Company, LLC	LED RED CLEAR T-1 T/H	768
VAOL-5LSBY4 Visual Communications Company, LLC	LED BLUE CLEAR T/H	717
VAOL-3HCE4 Visual Communications Company, LLC	LED YELLOW CLEAR T/H	293
VAOL-5LCE2 Visual Communications Company, LLC	LED YELLOW DIFFUSED T/H	972
CMD12-21VGC/TR8 Visual Communications Company, LLC	LED GREEN CLEAR SMD R/A	3591
CMD95-21VRCTR10 Visual Communications Company, LLC	LED RED CLEAR Z-BEND SMD	2690

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