LED Indication - Discrete

Image Part Number Description / PDF Quantity Rfq
LTST-S271KGKT

LTST-S271KGKT

Lite-On, Inc.

LED GREEN CLEAR CHIP SMD R/A

0

LTL1CHTGD6

LTL1CHTGD6

Lite-On, Inc.

LED GREEN DIFFUSED T/H

0

LTST-S326TBKFKT

LTST-S326TBKFKT

Lite-On, Inc.

LED BLUE/ORANGE CLR CHIP SMD R/A

0

LTST-C195KGKFKT

LTST-C195KGKFKT

Lite-On, Inc.

LED GREEN/ORANGE CLEAR CHIP SMD

0

LTST-C281KFKT

LTST-C281KFKT

Lite-On, Inc.

LED ORANGE CLEAR CHIP SMD

0

LTST-020KFKT

LTST-020KFKT

Lite-On, Inc.

LED ORANGE CLEAR SMD R/A

0

LTL-5223

LTL-5223

Lite-On, Inc.

LED RED DIFFUSED T/H

0

LTST-C281KRKT

LTST-C281KRKT

Lite-On, Inc.

LED RED CLEAR CHIP SMD

0

LTW-110TLA

LTW-110TLA

Lite-On, Inc.

LED WHITE CHIP SMD R/A

0

LTST-108KFKT

LTST-108KFKT

Lite-On, Inc.

LED ORANGE CLEAR SMD R/A

0

LTST-M670TGKT

LTST-M670TGKT

Lite-On, Inc.

LED GREEN CLEAR 2PLCC SMD

0

LTST-C283TBKT-5A

LTST-C283TBKT-5A

Lite-On, Inc.

LED BLUE CLEAR CHIP SMD

0

LTW-21TS5

LTW-21TS5

Lite-On, Inc.

LED WHITE CHIP SMD

0

LTST-108KRKT

LTST-108KRKT

Lite-On, Inc.

LED RED CLEAR SMD R/A

0

LTST-S326GYKT

LTST-S326GYKT

Lite-On, Inc.

LED GREEN/YLW CLEAR CHIP SMD R/A

0

LTL-5234

LTL-5234

Lite-On, Inc.

LED GREEN CLEAR T/H

0

LTL2P3EX2KS

LTL2P3EX2KS

Lite-On, Inc.

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

0

LTL81HKYKNN

LTL81HKYKNN

Lite-On, Inc.

LED YELLOW CLEAR T/H

0

LTL-353CKR-H4

LTL-353CKR-H4

Lite-On, Inc.

LED RED CLEAR T/H

0

LTL2H3YZ1K

LTL2H3YZ1K

Lite-On, Inc.

LAMP 5MM YELLOW 587NM CLR

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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