LED Indication - Discrete

Part Number	Description / PDF	Quantity
XZM2CRK53W-1 SunLED	LED RED CLEAR 2SMD	29191
XLUY11D SunLED	LED YELLOW DIFFUSED T-1 T/H	739
CLM4B-BKW-CUBVA453 Cree	LED BLUE 4PLCC SMD	0
C513A-WSN-CY0Z0232 Cree	LED WHITE 5MM ROUND T/H	1842
150066RV54050 Würth Elektronik Midcom	WL-SBCD SMT BI-COLOR CHIP LED DI	1730
HSMA-A401-U45M1 Broadcom	LED AMBER CLEAR 4PLCC SMD	6976
WP132XID Kingbright	LED RED DIFFUSED T-1 T/H	11931
LTST-C190KAKT Lite-On, Inc.	LED RED-ORANGE CLEAR CHIP SMD	23946
OVLLB8C7 TT Electronics / Optek Technology	LED BLUE CLEAR 5MM T/H	15879
SSL-LX4673YD-LA20 Lumex, Inc.	LED YELLOW DIFF RECT 4MMX7MM T/H	8590
5219632F Dialight	LED GREEN DIFFUSED 2MM T/H	1275
CSDK63Y2C ChromeLED	LED YELLOW CLEAR DOME 0603 SMD	100
VLMY30J2M1-GS08 Vishay / Semiconductor - Opto Division	LED YELLOW CLEAR 2PLCC SMD	90
APA2106SECK Kingbright	LED ORANGE CLEAR SMD R/A	148376
ALMD-LG36-WZ002 Broadcom	LED RED DIFFUSED SMD	0
HLMP-4101 Broadcom	LED RED CLEAR T-1 3/4 T/H	5903
XZCBD81FS SunLED	LED BLUE CLEAR 2SMD R/A	8870
SML-A12MTT86J ROHM Semiconductor	LED GREEN CLEAR 1611 SMD R/A	0
QBL8IB60D QT Brightek	LED BLUE 5MM ROUND T/H COLOR DIF	10604
VLMG3105-GS08 Vishay / Semiconductor - Opto Division	LED GREEN CLEAR 2PLCC SMD	7749

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