LED Indication - Discrete

Image Part Number Description / PDF Quantity Rfq
LTL2R3FV3KS

LTL2R3FV3KS

Lite-On, Inc.

LAMP 5MM AMBER 605NM CLR

0

LTW-M140SXS57

LTW-M140SXS57

Lite-On, Inc.

LED COOL WHITE 2PLCC SMD

0

LTL2V3EUJS

LTL2V3EUJS

Lite-On, Inc.

LED RED CLEAR ROUND THROUGH HOLE

0

LTL-1CHCGK7

LTL-1CHCGK7

Lite-On, Inc.

LED GREEN CLEAR T-1 T/H

0

LTL-4236

LTL-4236

Lite-On, Inc.

LED GREEN CLEAR T-1 T/H

0

LTL-2251AT

LTL-2251AT

Lite-On, Inc.

LED GREEN DIFFUSED 3MM T/H

0

LTL912SHKSA

LTL912SHKSA

Lite-On, Inc.

LED RED CLEAR T/H

0

LTL251

LTL251

Lite-On, Inc.

LED YELLOW DIFFUSED T/H

0

LTL2V3RUKS

LTL2V3RUKS

Lite-On, Inc.

LAMP T/S 5MM RED 639NM 30DEG CLR

0

LTSN-E263CEGBK

LTSN-E263CEGBK

Lite-On, Inc.

LED RGB WATER CLEAR 6SMD

0

LTL2V3EY3KS

LTL2V3EY3KS

Lite-On, Inc.

LAMP 5MM RED 624NM CLR

0

LTW-G673VS-CM

LTW-G673VS-CM

Lite-On, Inc.

LED BLUE 6PLCC SMD

0

LTL353TBK4

LTL353TBK4

Lite-On, Inc.

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

0

LTL2P3EGK

LTL2P3EGK

Lite-On, Inc.

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

0

LTL914SHKS

LTL914SHKS

Lite-On, Inc.

LED ORANGE CLEAR T/H

0

LTL2R3CBK5

LTL2R3CBK5

Lite-On, Inc.

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

0

LTST-E683GBEW

LTST-E683GBEW

Lite-On, Inc.

LED PLCC4 3528 RGB TOP WHT DIFF

0

LTST-682KGKFWT

LTST-682KGKFWT

Lite-On, Inc.

LED 4PLCC SMD

0

LTST-E682KRKGKT

LTST-E682KRKGKT

Lite-On, Inc.

LED TOP RED GREEN CLEAR 4PLCC

0

LTL-10233

LTL-10233

Lite-On, Inc.

LED GREEN DIFFUSED T/H

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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