LED Indication - Discrete

Part Number	Description / PDF	Quantity
LNJ811R88RA Panasonic	LED ORANGE 3216 SMD	207
LNJ437W84RA Panasonic	LED AMBER ESS II SMD	126
LN2162C68TR Panasonic	LED GREEN/ORANGE CLEAR GW SMD	616
LNJ8L6C18RA Panasonic	LED RED 3533 SMD	975
LNJ651C4WRA Panasonic	LED GREEN 2SMD	8552
LNJ717W80RA Panasonic	LED BLUE/GRN/ORG TSS LED SMD	93
LNJ818C88RA Panasonic	LED ORANGE SMD	2303
LNJ853W86RA Panasonic	LED ORANGE SV 0.5 TYPE SMD R/A	14083
LNJ414K84RA Panasonic	LED AMBER USS TYPE LED SMD	4605
LN465YPH Panasonic	LED AMBER DIFF SQUARE LED T/H	0
LNJ406K54UX Panasonic	LED AMBER DIFFUSED SMD	4295
LNJ424C46RA Panasonic	LED AMBER 3528 SMD	3340
LNJ453W82RA Panasonic	LED AMBER SV 0.5 TYPE SMD R/A	11371
LNJ311G83RA Panasonic	LED GREEN SMD	2775
LN842RP Panasonic	LED ORG DIFF SQUARE TYPE LED T/H	23
LNJ717W80RA1 Panasonic	LED BLUE/GRN/ORG TSS LED SMD	2655
LN221RPH Panasonic	LED RED 2.6MM ROUND T/H	671
LNJ115W8ARA Panasonic	LED GREEN/ORANGE TSS-2 TYPE SMD	28330
LNJ8L4C18RAA Panasonic	LED RED CLEAR 4PLCC SMD	3762
LNJ836W86RA Panasonic	LED ORANGE SMD	6223

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