LED Indication - Discrete

Part Number	Description / PDF	Quantity
5972301213F Dialight	LED GREEN CLEAR SMD R/A	26834000
5972401407F Dialight	LED YELLOW CLEAR 1208 SMD R/A	5824000
5219215F Dialight	LED RED DIFFUSED 3MM T/H	597
5988210100F Dialight	LED RED CLEAR 1206 SMD	0
5973306202F Dialight	LED GREEN CLEAR 2PLCC SMD	200
5988740302F Dialight	LED BLUE/GREEN/YLW CLR 0606 SMD	14
5988250107F Dialight	LED YELLOW CLEAR 1206 SMD	25348
5973607602F Dialight	LED BLUE CLEAR 0603 SMD	20
5973909207F Dialight	LED WHITE 4PLCC SMD	0
5219450F Dialight	LED GREEN/RED DIFFUSED 5MM T/H	674
5972212402NF Dialight	LED ORANGE CLEAR 1208 SMD R/A	0
5219704F Dialight	LED ORANGE DIFFUSED 5MM T/H	584
5988610302F Dialight	LED RGB CLEAR 1210 SMD	200
5988140102F Dialight	LED YELLOW CLEAR 0805 SMD	0
5973121207F Dialight	LED RED CLEAR 2PLCC SMD	1738
5988181107F Dialight	LED GREEN CLEAR 0805 SMD	913388000
5219266F Dialight	LED GREEN DIFFUSED RECT T/H	0
5988260107F Dialight	LED YELLOW/GREEN CLEAR 1206 SMD	37637
5988070102F Dialight	LED GREEN CLEAR 0603 SMD	349020
5990230007F Dialight	LED ORANGE 1206 SMD	1425

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