LED Indication - Discrete

Part Number	Description / PDF	Quantity
C503B-ACN-CYBZA252-030 Cree	LED AMBER CLEAR 5MM ROUND T/H	0
CLA2A-WKW-CYAZ0453 Cree	LED COOL WHITE DIFF 4PLCC SMD	0
C503B-BCN-CX0Y0451 Cree	LED BLUE CLEAR 5MM ROUND T/H	247
CLM2B-AEW-CYBB0263 Cree	LED AMBER CLEAR 4PLCC SMD	6
C535A-WJN-CT0W0231 Cree	LED COOL WHITE CLEAR 5MM T/H	13811
C566C-AFF-CU0V0342 Cree	LED AMBER CLEAR 5MM ROUND T/H	0
C503C-WAN-CCADB231 Cree	LED COOL WHITE CLR 5MM RND T/H	2813
C503B-ACN-CX0Y0251 Cree	LED AMBER CLEAR 5MM ROUND T/H	60573
C5SMF-BJE-CS24Q3T2 Cree	LED BLUE CLEAR 5MM OVAL T/H	0
CLM3C-WKW-CWBYA153 Cree	LED COOL WHITE DIFF 2PLCC SMD	92522
C566D-AFF-CV0X0251 Cree	LED AMBER CLEAR 5MM OVAL T/H	0
C503B-AAN-CZ0B0342 Cree	LED AMBER 5MM ROUND T/H	0
C513A-MSN-CW0Z0132 Cree	LED WARM WHITE CLEAR 5MM T/H	0
CLVBA-FKA-CC1F1L1BB7R3R3 Cree	LED RGB DIFFUSED 4PLCC SMD	0
C503B-GAS-CB0F0792 Cree	LED GREEN CLEAR 5MM ROUND T/H	0
CP41B-RFS-CL0P0EE4 Cree	LED RED CLEAR P4 T/H	20
CLM4B-RKW-CWAXBAA3 Cree	LED RED CLEAR 4PLCC SMD	18765
C5SMF-BJE-CR0U0352 Cree	LED BLUE CLEAR 5MM OVAL T/H	0
C503B-BCS-CV0Z0462 Cree	LED BLUE CLEAR 5MM ROUND T/H	2231
C513A-MSN-CW0Z0131 Cree	LED WARM WHITE CLEAR 5MM 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