LED Indication - Discrete

Part Number	Description / PDF	Quantity
VFHR1116P-4C82A-TR Stanley Electric	LED RED DIFFUSED 1608 SMD	4983
SML-H12D8TT86C ROHM Semiconductor	LED ORANGE CLEAR 2012 SMD	0
Z-212G JKL Components Corporation	LED GREEN CLEAR T-1 3/4 T/H	0
HLMP-C008-U0000 Broadcom	LED RED CLEAR 5MM T/H	195
VLDY1535R-08 Vishay / Semiconductor - Opto Division	LED YELLOW CLEAR 2SMD	5990
HLMP-1401-E0000 Broadcom	LED YELLOW DIFFUSED T-1 T/H	0
HSMG-C150 Broadcom	LED GREEN DIFFUSED CHIP SMD	267277
APFA3010SURKCGKSYKC Kingbright	LED GREEN/RED/YLW CLEAR 4SMD R/A	8291
APTD3216LCGCK Kingbright	LED GREEN CLEAR 2SMD	8704
SML-010LTT86 ROHM Semiconductor	LED RED CLEAR 3020 SMD	17494
XZCBD54W-1 SunLED	LED BLUE CLEAR CHIP SMD	5765
SM1204URC Califia Lighting (Bivar)	LED RED CLEAR 1204 SMD R/A	690
VLMS30J2K2-GS18 Vishay / Semiconductor - Opto Division	LED RED CLEAR 2PLCC SMD	0
5973311407NF Dialight	LED GREEN CLEAR 1206 SMD	9683
SSL-LX3044USBD Lumex, Inc.	LED BLUE DIFFUSED T-1 T/H	8047
XZM2CRK45S SunLED	LED RED CLEAR 2PLCC SMD	0
4301F1/5 Visual Communications Company, LLC	LED GREEN/RED DIFFUSED T-1 T/H	195
CTL0402FGR1T Venkel LTD	LED 0402 FLAT LENS GREEN	0
5973325407F Dialight	LED GREEN CLEAR 1206 SMD	0
QBL8IW30C-NW QT Brightek	LED NATURAL WHITE, T-1 3/4, 5MM	9969

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