INDUSTRY COMPONENT

Infrared LED

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

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
ParameterTypical rangeNotes & selection driver
Wavelength850-950 nm
Viewing Angle15-40 degrees
Rise/Fall Time10-100 ns
Forward Current20-100 mA
Forward Voltage1.2-1.6V
Radiant Intensity10-50 mW/sr
Operating Temperature-40°C to +85°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
IEC 60747-5-2, JEDEC JESD22

Parent Products

This component is used in the following industrial products

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

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Infrared LED

Manufacturer profiles associated with Infrared LED.

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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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