LED Indication - Discrete

Image Part Number Description / PDF Quantity Rfq
LTL307VRKNN

LTL307VRKNN

Lite-On, Inc.

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

0

LTST-M140KRKT

LTST-M140KRKT

Lite-On, Inc.

LED RED CLEAR 2PLCC SMD

0

LTL-6223LN

LTL-6223LN

Lite-On, Inc.

LED RED DIFFUSED

0

LTL1CHJDE

LTL1CHJDE

Lite-On, Inc.

LED LAMP 3MM SUPER RED T/H

0

LTST-5630ULWT

LTST-5630ULWT

Lite-On, Inc.

LED BLUE DIFFUSED SMD

0

LTL914CBKS5

LTL914CBKS5

Lite-On, Inc.

LED BLUE CLEAR T/H

0

LTL2R3TBK4

LTL2R3TBK4

Lite-On, Inc.

LED BLUE CLEAR 5MM T-1 3/4 T/H

0

LTL42KS5N

LTL42KS5N

Lite-On, Inc.

LED 3MM YELLOW DIFF TH

0

LTW-E670DS-STD

LTW-E670DS-STD

Lite-On, Inc.

LED WHITE 4PLCC SMD

0

LTST-S115KGKFKT

LTST-S115KGKFKT

Lite-On, Inc.

LED GREEN/ORANGE CLEAR CHIP SMD

0

LTST-C155KSKRKT

LTST-C155KSKRKT

Lite-On, Inc.

LED YLW/RED CLEAR 1210

0

LTL-293SJ

LTL-293SJ

Lite-On, Inc.

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

0

LTST-5630UBWT

LTST-5630UBWT

Lite-On, Inc.

LED INDICATION SMD

0

LTL-10234

LTL-10234

Lite-On, Inc.

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

0

LTL1KHCBP7T

LTL1KHCBP7T

Lite-On, Inc.

LED BLUE DIFFUSED 3MM T/H

0

LTL-4294

LTL-4294

Lite-On, Inc.

LED ORANGE-RED CLEAR T-1 3/4 T/H

0

LTL3H3TGRADS

LTL3H3TGRADS

Lite-On, Inc.

LAMP 3MM OVAL GREEN 571NM

0

LTL-221

LTL-221

Lite-On, Inc.

LED RED DIFFUSED T-1 T/H

0

LTW-F012N

LTW-F012N

Lite-On, Inc.

LED PLCC FLASH WHITE SMD

0

LTL291

LTL291

Lite-On, Inc.

LED RED 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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