LED Indication - Discrete

Image Part Number Description / PDF Quantity Rfq
LTL2P7UBK

LTL2P7UBK

Lite-On, Inc.

LED BLUE CLEAR T/H

0

LTL-2221AT

LTL-2221AT

Lite-On, Inc.

LED RED DIFFUSED 3MM T/H

0

LTW-020GCG

LTW-020GCG

Lite-On, Inc.

LED WHITE SIDE VIEW PLCC

0

LTL-30EJH96

LTL-30EJH96

Lite-On, Inc.

LED 5MM RED GREEN TH

0

LTST-C190CKT-BH

LTST-C190CKT-BH

Lite-On, Inc.

LED CHIP LTST-C190 0603 SMD

0

LTL-23223A

LTL-23223A

Lite-On, Inc.

LED RED DIFFUSED T/H

0

LTL3H3TBLADS

LTL3H3TBLADS

Lite-On, Inc.

LAMP 3MM OVAL BLUE 470NM

0

LTST-010TBKT

LTST-010TBKT

Lite-On, Inc.

LED BLUE CLEAR SMD R/A

0

LTL-1CHPE

LTL-1CHPE

Lite-On, Inc.

LED RED CLEAR T/H

0

LTL2T3TGKS6

LTL2T3TGKS6

Lite-On, Inc.

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

0

LTW-198ZDS5

LTW-198ZDS5

Lite-On, Inc.

LED WHITE CHIP SMD

0

LTL2P3UBK

LTL2P3UBK

Lite-On, Inc.

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

0

LTL-N709G

LTL-N709G

Lite-On, Inc.

LED GREEN DIFFUSED T/H

0

LTL1CHTBJ3A

LTL1CHTBJ3A

Lite-On, Inc.

LED BLUE DIFF RADIAL LEAD T/H

0

LTL8166FTNN

LTL8166FTNN

Lite-On, Inc.

LED ORANGE CLEAR T/H

0

LTL-1NHGP6

LTL-1NHGP6

Lite-On, Inc.

LED GREEN DIFFUSED T-1 T/H

0

LTST-S271EKT

LTST-S271EKT

Lite-On, Inc.

LED CHIP SMD R/A

0

LTL2V3EV3KS

LTL2V3EV3KS

Lite-On, Inc.

LAMP 5MM RED 624NM CLR

0

LTW-670US

LTW-670US

Lite-On, Inc.

LED WHITE 2PLCC SMD

0

LTSN-E263HEGBK

LTSN-E263HEGBK

Lite-On, Inc.

LED RGB WATER CLEAR 6SMD

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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