LED Indication - Discrete

Image Part Number Description / PDF Quantity Rfq
LTL1CHUBK

LTL1CHUBK

Lite-On, Inc.

LED BLUE CLEAR T-1 T/H

0

LTL-23233A

LTL-23233A

Lite-On, Inc.

LED GREEN DIFFUSED T/H

0

LTL5H3CBS5

LTL5H3CBS5

Lite-On, Inc.

LED BLUE DIFFUSED 5MM OVAL T/H

0

LTL1CHUBJ-UA

LTL1CHUBJ-UA

Lite-On, Inc.

LED BLUE DIFFUSED T/H

0

LTL2P3TBK

LTL2P3TBK

Lite-On, Inc.

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

0

LTL81HKEKNN

LTL81HKEKNN

Lite-On, Inc.

LED RED CLEAR T/H

0

LTL-1224A

LTL-1224A

Lite-On, Inc.

LED RED DIFFUSED T/H

0

LTW-M670ZVS-A25

LTW-M670ZVS-A25

Lite-On, Inc.

LED YELLOW WHITE SURFACE MOUNT

0

LTST-C950RCKT-CS

LTST-C950RCKT-CS

Lite-On, Inc.

LED CHIP LTST-C950 DOME SMD

0

LTL81HKGKNN

LTL81HKGKNN

Lite-On, Inc.

LED GREEN CLEAR T/H

0

LTL-9223A

LTL-9223A

Lite-On, Inc.

LED RED DIFFUSED T/H

0

LTST-C150KDKT

LTST-C150KDKT

Lite-On, Inc.

LED CHIP LTST-C150 1206 SMD

0

LTST-C171CWRT

LTST-C171CWRT

Lite-On, Inc.

LED CHIP LTST-C171 0805 SMD

0

LTST-C150CKT-DSC

LTST-C150CKT-DSC

Lite-On, Inc.

LED CHIP LTST-C150 1206 SMD

0

LTL17KYV3JS

LTL17KYV3JS

Lite-On, Inc.

LAMP 5MM YELLOW 590NM CLR

0

LTL916VEKS

LTL916VEKS

Lite-On, Inc.

LED AMBER 594NM 25DEG CLEAR TH

0

LTL-23231AL

LTL-23231AL

Lite-On, Inc.

LED GREEN DIFFUSED T/H

0

LTL1CHKRK

LTL1CHKRK

Lite-On, Inc.

LED RED CLEAR T/H

0

LTL-4214

LTL-4214

Lite-On, Inc.

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

0

LTL-4212N

LTL-4212N

Lite-On, Inc.

LED RED CLEAR T-1 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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