LED Indication - Discrete

Part Number	Description / PDF	Quantity
VLRK31R1S2-GS08 Vishay / Semiconductor - Opto Division	LED RED CLEAR SMD	0
TLHR6405 Vishay / Semiconductor - Opto Division	LED RED DIFFUSED 5MM T/H	7687
VLMR31Q2T1-GS08 Vishay / Semiconductor - Opto Division	LED AMBER CLEAR 2PLCC SMD	0
VLMK33Q2T1-GS08 Vishay / Semiconductor - Opto Division	LED AMBER 2PLCC SMD	0
TLMG1100-GS08 Vishay / Semiconductor - Opto Division	LED GREEN 0603 SMD	362905
TLWR8902 Vishay / Semiconductor - Opto Division	LED RED CLEAR 4DIP THROUGH HOLE	0
VLMO31K1L2-GS18 Vishay / Semiconductor - Opto Division	LED ORANGE CLEAR 2PLCC SMD	0
VLMO335U2AA-GS08 Vishay / Semiconductor - Opto Division	POWER SMD LED SOFT ORANGE PLCC-2	30
VLMR334BACB-GS18 Vishay / Semiconductor - Opto Division	LED RED 2PLCC SMD	0
TLPP5600 Vishay / Semiconductor - Opto Division	LED GREEN DIFF SIDE LED T/H R/A	1207
VLMY233T2V2-GS08 Vishay / Semiconductor - Opto Division	LED YELLOW SMD MINILED SMD	1003
VLMW41S1T2-6K7L-08 Vishay / Semiconductor - Opto Division	LED COOL WHITE 2PLCC SMD	0
TLHB5102 Vishay / Semiconductor - Opto Division	LED BLUE CLEAR T-1 3/4 T/H	19
VLMS235S2U1-GS08 Vishay / Semiconductor - Opto Division	MINI SMD POWER LED SUPER RED	100
TLVP4200 Vishay / Semiconductor - Opto Division	LED GREEN CLEAR 3MM T/H	0
TLHB5800 Vishay / Semiconductor - Opto Division	LED BLUE CLEAR T-1 3/4 T/H	4387
VLWR9932 Vishay / Semiconductor - Opto Division	LED RED CLEAR T/H	0
VLME3105-GS08 Vishay / Semiconductor - Opto Division	LED YELLOW CLEAR 2PLCC SMD	0
TLCO5100 Vishay / Semiconductor - Opto Division	LED ORANGE CLEAR 5MM T/H	0
VLMS31J1L2-GS08 Vishay / Semiconductor - Opto Division	LED RED CLEAR 2PLCC SMD	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