LED Indication - Discrete

Part Number	Description / PDF	Quantity
156125RB73000 Würth Elektronik Midcom	LED BLUE/RED CLEAR 4SMD BOTTOM	1096
SML-D14U2WT86C ROHM Semiconductor	LED RED 1608 SMD	329
QBHP686-OH QT Brightek	2835 PLCC2 ORANGE WLD: 605NM TYP	3821
5975203407F Dialight	LED ORANGE DIFFUSED 0603 SMD	3621
L170B-QYC-YB American Opto Plus LED Corp.	2.0X1.25X0.8 MM SMD LEDYELLOW	0
XSUYR47M SunLED	LED RED/YELLOW DIFF RECT T/H	5
SLR343WBD2PT21 ROHM Semiconductor	LED WHITE CLEAR T-1 T/H	8408
AM2520SECK03 Kingbright	LED ORANGE CLEAR SMD	829
SSL-LX3044HD Lumex, Inc.	LED RED DIFFUSED T-1 T/H	0
150060AS75020 Würth Elektronik Midcom	WL-SMCW SMT MONO-COLOR CHIP LED	5468
CS63EGT2C ChromeLED	LED GREEN CLEAR CHIP 0603 SMD	0
HLMP-BD06-P0000 Broadcom	LED RED CLEAR T/H	17864
CS85BRR1C ChromeLED	LED RED CLEAR 0805 SMD	50
CMDA19AR7D1S Visual Communications Company, LLC	LED RED DIFFUSED 0603 SMD	0
CTL1206FWH1T Venkel LTD	LED 1206 FLAT LENS WHITE	21000
ASMB-TTB0-0A3A2 Broadcom	LED RGB DIFFUSED 6PLCC SMD	8755
IN-S66DATRYG Inolux	LED RED/YLW-GRN CLEAR 0606 SMD	5165
LNJ324C43RA Panasonic	LED GREEN 3528 SMD	3377
HSMC-A160-Q00J1 Broadcom	LED RED CLEAR 2PLCC SMD	37290
CMD9121VGCTR10 Visual Communications Company, LLC	LED GREEN CLEAR Z-BEND SMD	21609

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