LED Indication - Discrete

Part Number	Description / PDF	Quantity
C503B-ACS-CY0Z0252 Cree	LED AMBER CLEAR 5MM ROUND T/H	0
VFHA1116P-4C82C-TR Stanley Electric	LED ORANGE DIFFUSED 1608 SMD	0
18-225/R6Y5C-A01/3T Everlight Electronics	18-225 SMD LED	2625
XZDG25X109FS SunLED	LED GREEN CLEAR 2SMD	0
SML-D13VWT86C ROHM Semiconductor	LED RED 1608 SMD	1455
LW514 Seoul Semiconductor	LED WHITE ROUND 5MM T/H	60595
5988940307F Dialight	LED BLUE/GREEN/YLW CLR 1210 SMD	0
QBLP679E-IWK-WW QT Brightek	LED WHITE 6PLCC SMD	301
CLP6C-RKW-CYBA0AA3 Cree	LED RED CLEAR 6PLCC SMD	38
5972002602F Dialight	LED RED DIFFUSED 1208 SMD R/A	0
XLM2CR14W SunLED	LED RED CLEAR 5MM ROUND T/H	0
VLMY31J2K2-GS18 Vishay / Semiconductor - Opto Division	LED YELLOW CLEAR 2PLCC SMD	0
SML-LX23USBC-TR Lumex, Inc.	LED BLUE CLEAR SMD	22487
VAOL-5LAE2 Visual Communications Company, LLC	LED RED DIFFUSED T/H	2692
SSL-LX5093USBD Lumex, Inc.	LED BLUE DIFFUSED T-1 3/4 T/H	7515
XZM2ACY53W-8 SunLED	LED YELLOW CLEAR CHIP SMD	36407
B2G32UDNB20C000113U1930 Harvatek Corporation	1.6(L) X 1.25(W) X 0.4(H) MM BRI	0
APHB1608ZGSURKC Kingbright	LED GREEN/RED CLEAR 4SMD	2549
LS T67D-T2V1-1-1-20-R18-Z OSRAM Opto Semiconductors, Inc.	LED RED CLEAR 2PLCC SMD	1386
BL-XUB361-TR9 American Bright	AXIAL ORANGE RED	22220

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