LED Indication - Discrete

Part Number	Description / PDF	Quantity
5988510202F Dialight	LED GREEN/RED CLEAR 1208 SMD R/A	0
5977721202F Dialight	LED GREEN/YELLOW CLEAR 4PLCC SMD	0
5988510207F Dialight	LED GREEN/RED CLEAR 1208 SMD R/A	32
5972603507F Dialight	LED BLUE CLEAR 0605 SMD R/A	3999
5972601817F Dialight	LED BLUE CLEAR 1616 SMD R/A	3620
5973211207F Dialight	LED ORANGE 2SMD	157
5973311402NF Dialight	LED GREEN CLEAR 1206 SMD	2060
5988010100F Dialight	LED RED CLEAR 0603 SMD	0
5988360100F Dialight	LED YLW/GRN CLEAR 1208 SMD R/A	0
5973222407F Dialight	LED YELLOW CLEAR 0805 SMD	12491
5973401202F Dialight	LED YELLOW CLEAR 2PLCC SMD	1091
5988010107F Dialight	LED RED CLEAR 0603 SMD	2147483647
5973605607F Dialight	LED BLUE 0805 SMD	7907
5988030107F Dialight	LED ORANGE CLEAR 0603 SMD	304116000
5988560202F Dialight	LED RED/YLW CLEAR 1208 R/A SMD	0
5973408507F Dialight	LED YELLOW 0603 SMD	3920
5972033507F Dialight	LED RED CLEAR 0605 SMD R/A	2579
5973401407NF Dialight	LED YELLOW CLEAR 1206 SMD	12018
5988610207F Dialight	LED GREEN/RED CLEAR 1210 SMD	54680
5973301507F Dialight	LED GREEN CLEAR 1208 SMD	23822

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