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LED/Light Emitter Component – Computer, Electronic and Optical Product Manufacturing

Q: What is the primary function of an LED/Light Emitter in an optocoupler?

It converts electrical input signals into light pulses to provide electrical isolation between circuits, preventing noise and voltage transference.

Q: How does wavelength affect performance in industrial applications?

Infrared wavelengths (e.g., 850 nm) are common for high efficiency and minimal interference, ensuring reliable signal transmission in noisy environments.

Component Specifications

Definition

An LED/Light Emitter is a key optoelectronic component within optocouplers and digital isolator ICs. It converts electrical signals into infrared or visible light pulses, enabling galvanic isolation between input and output circuits. This component ensures signal integrity while preventing ground loops, voltage spikes, and noise interference in industrial systems.

Working Principle

Operates on electroluminescence: when forward-biased, electrons recombine with holes in the semiconductor material (typically gallium arsenide or similar compounds), emitting photons. In optocouplers, this light is detected by a photodetector (e.g., phototransistor) on the isolated side, reconverting it to an electrical signal.

Materials

Semiconductor materials: Gallium Arsenide (GaAs), Gallium Aluminum Arsenide (GaAlAs), or Gallium Phosphide (GaP) for infrared/visible wavelengths. Encapsulation: Epoxy resin or silicone for protection and optical coupling.

Technical Parameters

Wavelength 850-950 nm (infrared typical)
Rise/Fall Time <100 ns
Forward Current 10-50 mA
Forward Voltage 1.2-1.8 V
Isolation Voltage Up to 5000 Vrms
Operating Temperature -40°C to +100°C

Standards

ISO 9001, IEC 60747-5-5, JEDEC JESD22

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for LED/Light Emitter.

Parent Products

This component is used in the following industrial products

Optocoupler / Digital Isolator IC

An electronic component that provides electrical isolation between circuits while transmitting digital signals using light or electromagnetic coupling.

View Product Details

Engineering Analysis

Risks & Mitigation

Thermal degradation from overcurrent
Output decay over time (lifetime)
Sensitivity to electrostatic discharge (ESD)
Optical misalignment in assembly

FMEA Triads

Trigger: Excessive forward current
Failure: Reduced light output or permanent damage
Mitigation: Implement current-limiting resistors and thermal management

Trigger: ESD exposure during handling
Failure: Catastrophic or latent component failure
Mitigation: Use ESD-safe protocols and protective packaging

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±5% on forward voltage and wavelength under specified conditions

Test Method

IEC 60747-5-5 for optoelectronic isolation, including high-potential (hipot) and lifetime testing

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.

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Frequently Asked Questions

What is the primary function of an LED/Light Emitter in an optocoupler?

It converts electrical input signals into light pulses to provide electrical isolation between circuits, preventing noise and voltage transference.

How does wavelength affect performance in industrial applications?

Infrared wavelengths (e.g., 850 nm) are common for high efficiency and minimal interference, ensuring reliable signal transmission in noisy environments.

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.

LED/Light Emitter