INDUSTRY COMPONENT

LED (for optocoupler)

LED component used in optocouplers for electrical isolation and signal transmission in industrial applications.

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Component Specifications

Definition
A light-emitting diode (LED) specifically designed for use in optocoupler devices, which provide electrical isolation between input and output circuits by converting electrical signals into light signals that are transmitted across an isolation barrier to a photodetector.
Working Principle
The LED operates on electroluminescence principle where electrical current passing through semiconductor material causes photon emission. In optocouplers, this light output is transmitted through transparent isolation material to a photodetector, creating complete electrical isolation while enabling signal transmission.
Materials
Gallium arsenide phosphide (GaAsP) or gallium aluminum arsenide (GaAlAs) semiconductor materials, gold bonding wires, epoxy encapsulation with high dielectric strength, lead frame typically copper alloy with tin plating.
Technical Parameters
  • Wavelength 560-940nm (typically 850-940nm for infrared)
  • Package Type DIP-4, DIP-6, SOP-4, Mini-Flat
  • Response Time 2-10μs
  • Forward Current 10-50mA
  • Forward Voltage 1.2-1.8V
  • Isolation Voltage 2500-5000Vrms
  • Radiant Intensity 3-20mW/sr
  • Operating Temperature -40°C to +100°C
Standards
ISO 9001, IEC 60747-5-5, UL 1577, IEC 60950-1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for LED (for optocoupler).

optocoupler LED isolation LED industrial optoelectronics signal isolation component GaAsP LED electrical isolation diode industrial automation components LED (for optocoupler) LED (for optocoupler) in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Isolation Component (Optocoupler/Transformer)

Electrical isolation component that prevents high-voltage transients from damaging low-voltage control circuits in gate driver applications.

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Isolation Transformer/Optocoupler

An electronic component that provides electrical isolation between circuits while allowing signal or power transfer.

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Engineering Analysis

Risks & Mitigation
  • LED degradation over time reducing light output
  • Thermal runaway at high currents
  • Moisture ingress affecting isolation properties
  • Electrostatic discharge damage during handling
FMEA Triads
Trigger: Excessive forward current
Failure: LED catastrophic failure or rapid degradation
Mitigation: Implement current limiting circuits, use derating guidelines, monitor operating conditions
Trigger: High ambient temperature
Failure: Reduced light output and shortened lifespan
Mitigation: Improve thermal design, ensure proper ventilation, select high-temperature rated components
Trigger: Voltage transients on input side
Failure: LED damage and loss of signal transmission
Mitigation: Add transient voltage suppression, implement proper grounding, use surge-protected designs

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Forward voltage ±0.2V, wavelength ±20nm, isolation voltage tested at 150% rated value for 1 minute
Test Method
IEC 60747-5-5 for optoelectronic isolation devices, UL 1577 for voltage withstand testing, accelerated life testing per MIL-STD-883

Buyer Feedback

★★★★☆ 4.5 / 5.0 (20 reviews)

"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The LED (for optocoupler) arrived with full certification."

"Great transparency on the LED (for optocoupler) components. Essential for our Computer, Electronic and Optical Product Manufacturing supply chain."

"The LED (for optocoupler) we sourced perfectly fits our Computer, Electronic and Optical Product Manufacturing production line requirements."

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Frequently Asked Questions

What is the main purpose of LED in optocouplers?

The LED converts electrical input signals into light signals that can be transmitted across an electrical isolation barrier, providing galvanic isolation while maintaining signal integrity.

How does LED wavelength affect optocoupler performance?

Infrared wavelengths (850-940nm) are commonly used as they provide optimal transmission through isolation materials and better matching with silicon photodetectors for higher efficiency and speed.

What are key reliability factors for optocoupler LEDs?

Forward current derating, thermal management, encapsulation integrity, and maintaining proper drive conditions to prevent degradation of light output over time.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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