LED Indication - Discrete

Image	Part Number	Description / PDF	Quantity	Rfq
	LN38GPX Panasonic	LED GREEN 3MM ROUND T/H	0
	LN342GPH Panasonic	LED GREEN SQUARE TYPE LED T/H	0
	LNJ810C67RA Panasonic	LED ORANGE SV CASE TYPE SMD R/A	0
	LNJ818C8SRU Panasonic	LED ORANGE SMD BOTTOM ENTRY	0
	LN212RP Panasonic	LED RED DIFFUSED T/H	0
	LNJ406K54RX Panasonic	LED AMBER DIFF INGAAIP S-J SMD	0
	LN38GP Panasonic	LED GREEN DIFFUSED 3MM ROUND T/H	0
	LNJ811K8SRA Panasonic	LED ORANGE SMD	0
	LN39GPP Panasonic	LED GREEN DIFFUSED 4MM ROUND T/H	0
	LNJ812K87RA Panasonic	LED ORANGE DIFF TSS TYPE LED SMD	0
	LNJ310C6PRA Panasonic	LED GREEN SMD R/A	0
	LNJ461C34RA Panasonic	LED AMBER CLEAR 2SMD	0
	LN1871Y5TR Panasonic	LED ORANGE DIFFUSED S-GW SMD	0
	LN29RCPX Panasonic	LED RED 4MM ROUND T/H	0
	LN222RPH Panasonic	LED RED 2MM ROUND T/H	0
	LN21RPHL Panasonic	LED RED DIFFUSED 5MM ROUND T/H	0
	LNJ408K8YRA Panasonic	LED AMBER SS TYPE LED SMD	0
	LNJ115W8HRA Panasonic	LED BLUE/RED DIFF TSS LED SMD	0
	LN39GCPXUY Panasonic	LED GREEN 4MM ROUND T/H	0
	LN1461CTR Panasonic	LED AMBER CLEAR 2SMD	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