LED Indication - Discrete

Part Number	Description / PDF	Quantity
LNJ224C44RA Panasonic	LED RED 3528 SMD	3732
LNJ808K87RA Panasonic	LED ORANGE SS TYPE LED SMD	7386
LNJ324C43RA Panasonic	LED GREEN 3528 SMD	3377
LN873RPX Panasonic	LED ORANGE SQUARE TYPE LED T/H	269
LNJ808R83RA Panasonic	LED ORANGE SS TYPE LED SMD	2753
LNJ253W82RA Panasonic	LED RED SV 0.5 TYPE SMD R/A	2380
LNJ852W86RA Panasonic	LED ORANGE SV 0.4 TYPE SMD R/A	9050
LNJ8W0C83RA Panasonic	LED ORANGE WIDE ANGLE LED SMD	6765
LN224RPXB Panasonic	LED RED DIFF SQUARE TYPE LED T/H	0
LNJ624C4CRA Panasonic	LED GREEN 3528 SMD	3646
LNJ036X8ARA Panasonic	LED WHITE ESS TYPE LED SMD	296
LNJ816C83RA Panasonic	LED ORANGE MICROLENS SMD	2809
LNJ411K84RU Panasonic	LED AMBER SMD	5108
LN877RPX Panasonic	LED ORANGE DIFF 3MM ROUND T/H	829
LNG995PFBW Panasonic	LED BLUE 5.8MM OVAL T/H	0
LNG305CFT Panasonic	LED GREEN 5MM T-1 3/4 T/H	32299
LNJ167W87RA Panasonic	LED GREEN/RED 4SMD	6819
LN88RPX Panasonic	LED ORANGE 3MM ROUND T/H	356
LNJ826W83RA Panasonic	LED ORANGE UTSS TYPE SMD	12437
LNJC24X4ARA Panasonic	LED ICE BLUE 3528 SMD	1042

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