LED Indication - Discrete

Image Part Number Description / PDF Quantity Rfq
LTST-N683GBEW

LTST-N683GBEW

Lite-On, Inc.

LED RGB DIFFUSED 4PLCC SMD

0

LTST-E683RGBW

LTST-E683RGBW

Lite-On, Inc.

LED RGB DIFFUSED 4PLCC SMD

0

LTST-020VSKT

LTST-020VSKT

Lite-On, Inc.

LED ORANGE PLCC SMD R/A

3000

LTST-C198KGKT

LTST-C198KGKT

Lite-On, Inc.

LED GREEN CLEAR

0

LTL-403HR

LTL-403HR

Lite-On, Inc.

LED RED DIFFUSED RECT T/H

0

LTL2V3TCYK2

LTL2V3TCYK2

Lite-On, Inc.

LAMP THRU-HOLE ALINGAP 5MM BL

0

LTL-5233

LTL-5233

Lite-On, Inc.

LED GREEN DIFFUSED T/H

0

LTL-307C

LTL-307C

Lite-On, Inc.

LED RED DIFFUSED T/H

0

LTL-10224W

LTL-10224W

Lite-On, Inc.

LED RED CLEAR T/H

0

LTL2R3YW3KS

LTL2R3YW3KS

Lite-On, Inc.

LAMP 5MM YELLOW 587NM CLR

0

LTL-14CDJ

LTL-14CDJ

Lite-On, Inc.

LED GREEN/YELLOW DIFF T-1 T/H

0

LTST-C195TBKSKT-5A

LTST-C195TBKSKT-5A

Lite-On, Inc.

LED BLUE/YELLOW CLEAR CHIP SMD

0

LTST-020KRKT

LTST-020KRKT

Lite-On, Inc.

LED RED CLEAR SMD R/A

0

LTL-30EHJH96

LTL-30EHJH96

Lite-On, Inc.

LED GREEN/ORANGE-RED DIFFUSED

0

LTL-307ELC

LTL-307ELC

Lite-On, Inc.

LED RED DIFFUSED T-1 3/4 T/H

0

LTST-G683RGBW

LTST-G683RGBW

Lite-On, Inc.

LED RGB DIFFUSED 6PLCC SMD

0

LTST-S271KSKT

LTST-S271KSKT

Lite-On, Inc.

LED YELLOW CLEAR CHIP SMD R/A

0

LTST-S270KDKT

LTST-S270KDKT

Lite-On, Inc.

LED CHIP LTST-S270 0603 SMD

0

LTL30EKFGJ

LTL30EKFGJ

Lite-On, Inc.

LED GRN/ORANGE DIFF T-1 3/4 T/H

0

LTST-T680VEWT

LTST-T680VEWT

Lite-On, Inc.

LED RED DIFFUSED 2SMD

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

TypeFunctional CharacteristicsApplication Examples
Visible LEDsEmits light in visible spectrum (400-700nm), available in multiple colorsIndicator lamps, display backlighting, decorative lighting
Infrared LEDsEmits 700nm-1mm wavelength radiation, invisible to human eyeRemote controls, security sensors, night vision systems
High-Brightness LEDsEnhanced luminous intensity (>1000mcd) with advanced packagingAutomotive lighting, outdoor displays, emergency signage
UV LEDsUltraviolet 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

ParameterSignificanceTypical Range
WavelengthDetermines light color and application suitability375nm-940nm
Luminous IntensityMeasures brightness output (mcd)50-10,000mcd
Forward CurrentOperating current rating20-150mA
Forward VoltageElectrical potential drop1.8-3.6V
Viewing AngleLight emission spread measurement5 -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

ManufacturerProduct SeriesKey Features
Cree Inc.XLamp XP-G3High brightness (3200mcd), 120 viewing angle
OSRAM OptoOSTAR ProjectionHigh-power LED for automotive lighting
Nichia Corp.NSHU5991UV LED (365nm) for curing applications
Everlight ElectronicsLTST-C19HE8WTTri-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
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