LED Indication - Discrete

Part Number	Description / PDF	Quantity
QBHP686-YH QT Brightek	2835 PLCC2 YELLOW WLD: 590NM TYP	3822
IN-S124ARUY Inolux	LED YELLOW CLEAR 1204 SMD	0
NTE30123 NTE Electronics, Inc.	LED-8MM PURPLE	0
5972003507F Dialight	LED RED CLEAR 0605 SMD R/A	47196000
XZCBDVG53W-9 SunLED	1.6X0.8MM BI-COLOR BLUE/GRN SMD	80
XZCFBB53W-8VF SunLED	1.6X0.8MM LC BLUE PIXSOLED DOME	2808
L196L-NWC-L-TR American Opto Plus LED Corp.	0603 WHITE SMD LED -5MA	0
CSM28G2CZ ChromeLED	LED GREEN CLEAR Z-BEND SMD	5
150060RS75020 Würth Elektronik Midcom	WL-SMCW SMT MONO-COLOR CHIP LED	7092
C5SMF-BJE-CR14Q4T2 Cree	LED BLUE CLEAR 5MM OVAL T/H	0
HSME-C110 Broadcom	LED GREEN CLEAR CHIP SMD	24402
WP7113SECK/J4 Kingbright	LED ORANGE CLEAR T-1 3/4 T/H	1
XZCCBDMEDGK161W SunLED	2.5X0.7MM LC RGB RIGHT ANGLE SMD	3817
VLMW1500-GS08 Vishay / Semiconductor - Opto Division	LED COOL WHITE 0402 SMD	15136
OVLBG4C7 TT Electronics / Optek Technology	LED GREEN CLEAR 3MM T/H	13917
LA T68B-T2V1-24-Z OSRAM Opto Semiconductors, Inc.	LED AMBER CLEAR 2PLCC SMD	582
LTST-C150AKT Lite-On, Inc.	LED AMBER CLEAR SMD	9535
XZCFBB74W-3VU SunLED	2.1X0.6MM LC BLUE RIGHT ANGLE SM	1290
XLM2MOK20W SunLED	LED ORANGE CLEAR RADIAL LEAD T/H	128
5988040102F Dialight	LED YELLOW CLEAR 0603 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