LED Indication - Discrete

Image Part Number Description / PDF Quantity Rfq
LTL2V3TCYK2S

LTL2V3TCYK2S

Lite-On, Inc.

LAMP 5MM BLUE GREEN 571NM

0

LTST-C198KFKT

LTST-C198KFKT

Lite-On, Inc.

LED 0603 605NM AMBER CLR SMD

0

LTL42CB6N

LTL42CB6N

Lite-On, Inc.

LED BLUE CLEAR T-1 T/H

0

LTL2V3TU75K

LTL2V3TU75K

Lite-On, Inc.

UV TH LAMP THRU-HOLE 5MM GRN

0

LTST-C198KRKT

LTST-C198KRKT

Lite-On, Inc.

LED 0603 RED 631NM CLEAR SMD

0

LTL-4233-R2

LTL-4233-R2

Lite-On, Inc.

LED GREEN DIFFUSED T/H

0

LTL201

LTL201

Lite-On, Inc.

LED RED DIFFUSED T/H

0

LTL-353CK-H4

LTL-353CK-H4

Lite-On, Inc.

LED RED CLEAR T/H

0

LTL2R3FU3JSR

LTL2R3FU3JSR

Lite-On, Inc.

LED AMBER DIFFUSED T-1 3/4 T/H

0

LTST-C190KDKT

LTST-C190KDKT

Lite-On, Inc.

LED CHIP LTST-C190 0603 SMD

0

LTL3H3TGUADS1

LTL3H3TGUADS1

Lite-On, Inc.

LAMP 3MM OVAL GREEN 571NM

0

LTL-3221A

LTL-3221A

Lite-On, Inc.

LED RED DIFFUSED T/H

0

LTL-4208

LTL-4208

Lite-On, Inc.

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

0

LTL2P7TGK

LTL2P7TGK

Lite-On, Inc.

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

0

LTST-T680VSWT

LTST-T680VSWT

Lite-On, Inc.

LED YELLOW DIFFUSED 2SMD

0

LTL-307CK

LTL-307CK

Lite-On, Inc.

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

0

LTW-420DS4

LTW-420DS4

Lite-On, Inc.

LED WHITE CLEAR T-1 T/H

0

LTL2H3EX1K

LTL2H3EX1K

Lite-On, Inc.

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

0

LTL2R3KDKNN

LTL2R3KDKNN

Lite-On, Inc.

LED LAMP 5MM T/H

0

LTL-58EFJ

LTL-58EFJ

Lite-On, Inc.

LED GREEN/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
RFQ BOM Call Skype Email
Top