LED Indication - Discrete

Part Number	Description / PDF	Quantity
XZMDKCBD55W-4 SunLED	LED BLUE/RED CLEAR 2SMD	8653
QBLP679E-IBK QT Brightek	LED BLUE 6PLCC SMD	7805
ASMT-SWBM-NV803 Broadcom	PLCC4,PWR,T/MT,120VA,INGAN,LLWHI	11696
QBLP670-AG QT Brightek	LED YELLOW/GREEN 2PLCC SMD	235
SML-D12P8WT86C ROHM Semiconductor	LED GREEN 1608 SMD	1554
5972751607F Dialight	LED GRN/RED CLEAR 2SMD R/A	703024000
LTST-S321KFKT Lite-On, Inc.	LED ORANGE CLEAR 1208 R/A SMD	0
XSVG43MB SunLED	LED GREEN DIFFUSED ICE CUBE T/H	0
5972901822F Dialight	LED COOL WHT CLEAR 1616 SMD R/A	0
SM1206GC-IL Califia Lighting (Bivar)	LED GREEN CLEAR 1206 SMD	5315
5990020007F Dialight	LED ORANGE-RED 0603 SMD	22970
L171L-QOC American Opto Plus LED Corp.	0805 ORANGE SMD LED	7985
APHB1608LVBDSEKJ3C Kingbright	LED BLUE/RED CLEAR 4SMD	2856
HLMP-BD06-P00DD Broadcom	LED RED CLEAR T/H	263022
LTL-4231 Lite-On, Inc.	LED GREEN DIFFUSED T-1 T/H	3458
L423SRD American Opto Plus LED Corp.	2.4X7.1X7.8MM RECTANGULAR LED	41875
HLMP-CM1G-350DD Broadcom	LED GREEN CLEAR T-1 3/4 T/H	24629
IN-S63AT5YG Inolux	LED YELLOW/GREEN CLEAR 0603 SMD	0
L150B-QEC American Opto Plus LED Corp.	3.2X1.6X1.1MM SMD LED (1206) RED	85
VLHW5100 Vishay / Semiconductor - Opto Division	LED WHITE CLEAR 5MM T/H	7533

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