LED Indication - Discrete

Part Number	Description / PDF	Quantity
CTL0805FWH1T Venkel LTD	LED 0805 FLAT LENS WHITE	16000
LW M67C-T2U2-JK0PM0-24G6-20-R18-Z OSRAM Opto Semiconductors, Inc.	LED WHITE DIFFUSED SMD	5970
4302H1-12V Visual Communications Company, LLC	LED RED DIFFUSED T-1 3/4 T/H	592
CMD12-21SRC/TR8 Visual Communications Company, LLC	LED RED CLEAR SMD R/A	5859
VLMY3102-GS08 Vishay / Semiconductor - Opto Division	LED YELLOW CLEAR 2PLCC SMD	3200
61-238/LK2C-B56706F4GB2/ET Everlight Electronics	LED COOL WHITE DIFF 6PLCC SMD	176
WP76761CSEC/J2-70MA Kingbright	7.6X7.6MM RED LED	250
5219820F Dialight	LED RED CLEAR 5MM T/H	63
WP710A10LVBC/D Kingbright	LED BLUE CLEAR T-1 T/H	6483
150080YS75000 Würth Elektronik Midcom	LED YELLOW CLEAR 0805 SMD	15673
VLDK1535G-08 Vishay / Semiconductor - Opto Division	LED AMBER CLEAR 2SMD	1
C566D-RFE-CV0X0BB1 Cree	LED RED CLEAR 5MM OVAL T/H	0
SSL-LX3059GYW Lumex, Inc.	LED GREEN/YLW DIFF T-3MM TRI T/H	5258
HLMP1790C6A0 Everlight Electronics	LED GREEN DIFFUSED T-1 T/H	0
5972002407NF Dialight	LED RED CLEAR 1208 SMD R/A	0
SML-D15UWT86 ROHM Semiconductor	LED RED DIFFUSED 1608 SMD	8605
HLMP-3451 Broadcom	LED YELLOW DIFFUSED T-1 3/4 T/H	0
TLUR5400 Vishay / Semiconductor - Opto Division	LED RED DIFFUSED T-1 3/4 T/H	3863
3BC-Y/G Califia Lighting (Bivar)	LED GREEN/YELLOW DIFF T-1 T/H	0
19-22SURSYGC/S530-A3/E2/TR8 Everlight Electronics	LED GREEN/RED CLEAR CHIP 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