INDUSTRY COMPONENT

Infrared LED

Infrared LED is a semiconductor light source emitting infrared radiation for optocoupler isolation and signal transmission.

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Component Specifications

Definition
An infrared LED (Light Emitting Diode) is a specialized semiconductor device that emits infrared light when electrically activated. As a core component in optocouplers, it converts electrical signals into optical signals, enabling galvanic isolation between input and output circuits to prevent electrical interference, noise, and voltage spikes in industrial control systems.
Working Principle
Operates on electroluminescence principle where current injection across a p-n junction in semiconductor materials (typically gallium arsenide or aluminum gallium arsenide) causes electron-hole recombination, releasing energy as infrared photons (wavelength 850-950 nm). In optocouplers, this infrared light crosses an isolation gap to activate a photodetector (phototransistor/diode), reconverting light back to electrical signals.
Materials
Semiconductor: Gallium Arsenide (GaAs) or Aluminum Gallium Arsenide (AlGaAs) substrate; Epoxy resin encapsulation with IR-transparent lens; Gold bonding wires; Copper alloy leads with tin plating.
Technical Parameters
  • Wavelength 850-950 nm
  • Viewing Angle 15-40 degrees
  • Rise/Fall Time 10-100 ns
  • Forward Current 20-100 mA
  • Forward Voltage 1.2-1.6V
  • Radiant Intensity 10-50 mW/sr
  • Operating Temperature -40°C to +85°C
Standards
ISO 9001, IEC 60747-5-2, JEDEC JESD22

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Infrared LED.

infrared LED optocoupler component IR diode signal isolation photoelectric coupling industrial electronics GaAs LED infrared emitter Infrared LED in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Optocoupler

An electronic component that transfers electrical signals between two isolated circuits using light waves

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Optical Coupler

An electronic component that transfers electrical signals between two isolated circuits using light waves.

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Optical Port

An optical interface component in smart meters that enables data communication via light signals.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Thermal degradation from overcurrent
  • Wavelength drift with temperature
  • Encapsulation cracking under mechanical stress
  • ESD sensitivity during handling
FMEA Triads
Trigger: Overcurrent operation exceeding rated forward current
Failure: LED junction overheating causing permanent brightness degradation or open circuit
Mitigation: Implement current-limiting resistors, use constant current drivers, and include thermal protection circuits
Trigger: Moisture ingress through encapsulation defects
Failure: Internal corrosion leading to intermittent operation or complete failure
Mitigation: Apply conformal coating, use hermetic packaging, and maintain controlled humidity during storage/assembly

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±5% wavelength consistency, ±10% radiant intensity variation
Test Method
IEC 60747-5-2 for optoelectronic isolation, JEDEC JESD22 for reliability testing, spectral analysis for wavelength verification

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

Related Components

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Serial Interface
Serial interface for industrial data transmission between IoT gateways and legacy equipment using RS-232/422/485 protocols.
I/O Connectors
Industrial I/O connectors are ruggedized interfaces that enable reliable data and power transmission between sensors, actuators, and Industrial IoT Gateways in harsh environments.

Frequently Asked Questions

Why use infrared instead of visible light in optocouplers?

Infrared light (850-950 nm) provides higher efficiency in photodetector response, better isolation from ambient visible light interference, and allows compact design with minimal light leakage in industrial environments.

How does infrared LED affect optocoupler speed?

The LED's rise/fall time (typically 10-100 ns) directly determines optocoupler switching speed. Faster LEDs enable high-speed data transmission (up to 10 Mbps) in industrial communication interfaces.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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