LED Indication - Discrete

Part Number	Description / PDF	Quantity
CMD333URC-2 Visual Communications Company, LLC	LED RED CLEAR T-1 3/4 T/H	4609
MV5477C Everlight Electronics	LED GREEN DIFFUSED T-1 T/H	0
NTE30076 NTE Electronics, Inc.	LED-SMD 1206 SUPER YELLOW	1933
ALMD-LM36-14002 Broadcom	LED GREEN DIFFUSED 4SMD	4074
SML-D12D8WT86 ROHM Semiconductor	LED ORANGE DIFFUSED 0603 SMD	5853
VLDR1235R Vishay / Semiconductor - Opto Division	LED RED CLEAR 2SMD BOTTOM ENTRY	6488
SML-010VTT86 ROHM Semiconductor	LED RED CLEAR 3020 SMD	7601
QBL8Y30C QT Brightek	LED YELLOW, T-1 3/4, 5MM, ROUND	10083
SSL-LX3044LID Lumex, Inc.	LED RED DIFFUSED T-1 T/H	17243
MT3030-WT-A Marktech Optoelectronics	LED WHITE CLEAR 3.0MM ROUND T/H	0
156125GS57000 Würth Elektronik Midcom	WL-SMRD SMD MONO-COLOR REVERSE M	4071
L150B-LEC-RL American Opto Plus LED Corp.	3.2X1.6X1.1MM SMD LED (1206) RED	0
QBLP595-IW-2897 QT Brightek	LED WHITE DIFFUSED 0402 SMD	92804
4303F7 Visual Communications Company, LLC	LED YELLOW DIFFUSED T-1 T/H	1953
BR1112H-TR Stanley Electric	LED RED DIFFUSED 2125 SMD	521
EAST1616RGBB6 Everlight Electronics	RGB SMD B PART	558
L513YD American Opto Plus LED Corp.	5MM YELLOW LED LAMP	257
VLME23Q2T1-GS08 Vishay / Semiconductor - Opto Division	LED YELLOW CLEAR SMD MINILED SMD	0
BR1102W-TR Stanley Electric	LED RED CLEAR 3216 SMD	66677
L196L-NWC American Opto Plus LED Corp.	0603 WHITE SMD LED	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