Structured Manufacturing Data (2026)

Opto-isolator Array

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Opto-isolator Array used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Opto-isolator Array is characterized by the integration of LED Array and Photodetector Array. In industrial production environments, manufacturers listed on CNFX commonly emphasize Gallium Arsenide (GaAs) LED construction to support stable, high-cycle operation across diverse manufacturing scenarios.

An integrated circuit containing multiple opto-isolators for electrical isolation between input and output signals.

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Product Specifications

Technical details and manufacturing context for Opto-isolator Array

Definition
A component within an Analog/Digital Input Module that provides galvanic isolation between external field signals and the module's internal circuitry. It uses multiple opto-couplers arranged in an array configuration to protect sensitive electronics from voltage spikes, ground loops, and electrical noise present in industrial environments.
Working Principle
Each opto-isolator in the array consists of an LED and a photodetector separated by a transparent insulating barrier. When an input signal activates the LED, it emits light that crosses the barrier and triggers the photodetector, creating an isolated output signal without electrical connection between input and output circuits.
Common Materials
Gallium Arsenide (GaAs) LED, Silicon Phototransistor, Plastic Encapsulation
Technical Parameters
  • Isolation voltage rating between input and output circuits (kV) Customizable
Components / BOM
  • LED Array
    Converts electrical input signals into light signals
    Material: Gallium Arsenide (GaAs)
  • Photodetector Array
    Converts light signals back into electrical output signals
    Material: Silicon
  • Insulating Barrier Part
    Provides electrical isolation between input and output circuits
    Material: Transparent Plastic/Glass

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Opto-isolator Array.

high-speed opto-isolator array IC GaAs LED phototransistor isolation module multi-channel optocoupler array circuit industrial grade opto-isolator chip plastic encapsulated opto-isolator array

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Analog/Digital Input Module
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
speed: Data rate: 1Mbps to 10Mbps depending on configuration
current: Input: 5mA to 20mA LED current, Output: 10mA to 50mA continuous collector current
voltage: Input: 3.3V to 5V typical, Output: Up to 600V isolation voltage
temperature: -40°C to +100°C (operating), -55°C to +125°C (storage)
Media Compatibility
✓ Digital signal isolation in PLC systems ✓ Motor control feedback circuits ✓ Medical equipment patient isolation
Unsuitable: High-voltage AC power line monitoring (requires specialized high-voltage isolators)
Sizing Data Required
  • Required isolation voltage rating (Vrms)
  • Data transmission speed requirement (bps)
  • Number of isolated channels needed

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
LED Degradation
Cause: Thermal stress from excessive current or ambient temperature, leading to reduced light output and eventual failure of the opto-isolator's internal LED.
Phototransistor/Photodiode Failure
Cause: Contamination ingress (dust, moisture) compromising the optical path, or electrostatic discharge (ESD) damaging the sensitive semiconductor components.
Maintenance Indicators
  • Intermittent or erratic signal transmission in the control system, indicating potential opto-isolator failure.
  • Visible physical damage such as cracks, discoloration, or charring on the opto-isolator housing, suggesting overheating or contamination.
Engineering Tips
  • Implement proper current limiting and thermal management (e.g., heat sinks, adequate ventilation) to prevent LED overheating and extend lifespan.
  • Ensure clean, dry installation environments and use ESD protection during handling to prevent contamination and electrostatic damage to internal components.

Compliance & Manufacturing Standards

Reference Standards
IEC 60747-5-5:2020 (Optoelectronic devices - Photocouplers) ISO 9001:2015 (Quality management systems) EN 62368-1:2014 (Audio/video, information and communication technology equipment - Safety requirements)
Manufacturing Precision
  • Input/Output Isolation Voltage: +/-10% of rated value
  • Current Transfer Ratio (CTR): +/-20% across specified temperature range
Quality Inspection
  • High-Potential (Hi-Pot) Isolation Voltage Test
  • Current Transfer Ratio (CTR) Measurement at multiple operating points

Factories Producing Opto-isolator Array

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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 application of an opto-isolator array in computer and electronic manufacturing?

Opto-isolator arrays provide electrical isolation between different circuit sections, preventing noise, voltage spikes, and ground loops from interfering with sensitive components in computers, communication devices, and optical products.

How does the Gallium Arsenide (GaAs) LED in this opto-isolator array improve performance?

GaAs LEDs offer higher efficiency and faster switching speeds compared to traditional materials, enabling better signal integrity and faster data transmission in opto-isolator applications.

What are the advantages of using a multi-channel opto-isolator array versus discrete opto-isolators?

Arrays save board space, reduce component count, improve matching between channels, and simplify assembly while providing consistent isolation performance across multiple signal paths.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Computer, Electronic and Optical Product Manufacturing.

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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