LED Indication - Discrete

Part Number	Description / PDF	Quantity
LNJ818C83RA Panasonic	LED ORANGE DOME LENS SMD	7277
LNJ024X4ARA Panasonic	LED WHITE 3528 SMD	1105
LNJ8L4C38RA Panasonic	LED RED 4PLCC SMD	1892
LN238RPH Panasonic	LED RED DIFFUSED 3MM ROUND T/H	196
LNJ811R8DRU Panasonic	LED ORANGE 3216 SMD	1173
LNJ826W86RA Panasonic	LED ORANGE UTSS TYPE SMD	16910
LNJ115W8RRA1 Panasonic	LED GREEN/ORANGE TSS-2 TYPE SMD	1625
LNJ806R58RX Panasonic	LED ORANGE DIFF INGAAIP S-J SMD	2535
LNJ167W85RA Panasonic	LED BLUE/RED 4SMD	210
LNJ412K84RA Panasonic	LED AMBER SMD	501
LNJ816C8DRU Panasonic	LED ORANGE MICROLENS SMD	825
LNJ836W83RA Panasonic	LED ORANGE ESS TYPE LED SMD	4274
LNJ037X8ARA Panasonic	LED WHITE ESS II SMD	53871
LNJ824C43RA Panasonic	LED ORANGE 3528 SMD	1995
LN438YPH Panasonic	LED AMBER DIFFUSED 3MM T/H	0
LN482YPX Panasonic	LED AMBER 2MM T/H	2055
LN11WP38 Panasonic	LED GREEN/ORANGE 5MM ROUND T/H	9259
LNJ216C8ARA Panasonic	LED RED MICROLENS SMD	0
LNJ211R82RA Panasonic	LED RED SMD	0
LN31GPHL Panasonic	LED GREEN DIFFUSED 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