LED Indication - Discrete

Image Part Number Description / PDF Quantity Rfq
LTST-S270TGKT

LTST-S270TGKT

Lite-On, Inc.

LED GREEN CLEAR CHIP SMD R/A

0

LTST-C195KRKSKT

LTST-C195KRKSKT

Lite-On, Inc.

LED RED/YELLOW CLEAR CHIP SMD

0

LTST-C19GD2WT

LTST-C19GD2WT

Lite-On, Inc.

LED RGB DIFFUSED 4SMD

0

LTL2V3TBS3KS

LTL2V3TBS3KS

Lite-On, Inc.

LED BLUE CLEAR T-1 3/4 T/H

0

LTST-M140TBKT

LTST-M140TBKT

Lite-On, Inc.

LED BLUE CLEAR 2PLCC SMD

0

LTST-C283KRKT-5A

LTST-C283KRKT-5A

Lite-On, Inc.

LED RED CLEAR SMD

0

LTST-C170KDKT

LTST-C170KDKT

Lite-On, Inc.

LED CHIP LTST-C170 0805 SMD

0

LTST-T680UGWT

LTST-T680UGWT

Lite-On, Inc.

LED GREEN DIFFUSED 2SMD

0

LTW-87HD4B

LTW-87HD4B

Lite-On, Inc.

LED WHITE CLEAR T-1 T/H

0

LTST-C21TBKT

LTST-C21TBKT

Lite-On, Inc.

LED BLUE CLEAR CHIP SMD

0

LTL-4222

LTL-4222

Lite-On, Inc.

LED RED CLEAR T-1 T/H

0

LTL1CHJGTNN

LTL1CHJGTNN

Lite-On, Inc.

LED GREEN CLEAR T/H

0

LTW-M670ZVS-M5

LTW-M670ZVS-M5

Lite-On, Inc.

LED WHITE SMD

0

LTST-S220TGKT

LTST-S220TGKT

Lite-On, Inc.

LED GREEN CLEAR CHIP SMD R/A

0

LTST-C281KSKT

LTST-C281KSKT

Lite-On, Inc.

LED YELLOW CLEAR CHIP SMD

0

LTW-C193US5

LTW-C193US5

Lite-On, Inc.

LED WHITE CHIP SMD

0

LTST-108TGKT

LTST-108TGKT

Lite-On, Inc.

LED GREEN CLEAR SMD R/A

0

LTW-C281DS5

LTW-C281DS5

Lite-On, Inc.

LED WHITE CHIP SMD

0

LTST-S482KSKT-5A

LTST-S482KSKT-5A

Lite-On, Inc.

LED CHIP SMD R/A

0

LTST-108KGKT

LTST-108KGKT

Lite-On, Inc.

LED GREEN CLEAR SMD R/A

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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