---
title: "Optocoupler / Isolation Circuit"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:OPTOCOUPLER_ISOLATION_CIRCUIT"
  data_integrity_hash: "df70d89a47530298266fd111d21ebd71"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:OPTOCOUPLER_ISOLATION_CIRCUIT"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/optocoupler-isolation-circuit.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/optocoupler-isolation-circuit"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-1.5 kV isolation voltage, 1-70 mA forward current, -40°C to +100°C ambient temperature"
    unit: "V"
engineering_limits:
  max_safe_operating_point:
    value: 150
    unit: "°C"
    consequence: "LED quantum efficiency degradation due to thermal runaway, phototransistor gain reduction from carrier recombination, insulation breakdown from dielectric polarization at high dv/dt"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Reverse voltage exceeding 5 V across LED terminals"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Schottky diode anti-parallel protection with 3 A surge rating"
  - node_2:
      trigger: "Common-mode transient immunity exceeding 25 kV/μs"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Guard ring isolation structure with 8 mm creepage distance"
bom_nodes:
  light-emitting-diode-led:
    type: "component"
    urn: "URN:CNFX:ME:LIGHT_EMITTING_DIODE_LED"
    interface_type: "physical-logic-coupled"
  photosensitive-detector:
    type: "component"
    urn: "URN:CNFX:ME:PHOTOSENSITIVE_DETECTOR"
    interface_type: "physical-logic-coupled"
  isolation-barrier:
    type: "part"
    urn: "URN:CNFX:ME:ISOLATION_BARRIER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/optocoupler-isolation-circuit.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "d398eae6c533cc8094142d59cdb0fb7d32a7af3b36658f9d97778c09d5ccfb11"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Optocoupler / Isolation Circuit

## 1. Technical Definition
An electronic component that transfers electrical signals between two isolated circuits using light, providing electrical isolation and noise immunity.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-1.5 kV isolation voltage, 1-70 mA forward current, -40°C to +100°C ambient temperature**. Failure boundary: **LED degradation at 150°C junction temperature, phototransistor saturation at 5 mA collector current, dielectric breakdown at 2.5 kV isolation voltage**, Mechanism: **LED quantum efficiency degradation due to thermal runaway, phototransistor gain reduction from carrier recombination, insulation breakdown from dielectric polarization at high dv/dt**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Reverse voltage exceeding 5 V across LED terminals | 8 | LED catastrophic failure with open circuit | Schottky diode anti-parallel protection with 3 A surge rating |
| Common-mode transient immunity exceeding 25 kV/μs | 8 | Phototransistor false triggering and logic errors | Guard ring isolation structure with 8 mm creepage distance |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | V | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Isolation Barrier](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/isolation-barrier.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Die Attach Machine**, **Wire Bonder**, **Encapsulation Molding Press**  
**Downstream Applications**: Industrial Motor Drives, Medical Diagnostic Equipment, Telecommunications Infrastructure  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What are the main advantages of using an optocoupler for circuit isolation?
**A**: Optocouplers provide complete electrical isolation between circuits, prevent ground loops, offer high noise immunity, and protect sensitive components from voltage spikes and surges.

### Q: How does the Gallium Arsenide LED in this optocoupler improve performance?
**A**: GaAs LEDs offer higher efficiency and faster switching speeds compared to traditional materials, enabling better signal transfer rates and improved reliability in high-frequency applications.

### Q: What applications are these optocouplers best suited for in computer and optical manufacturing?
**A**: Ideal for power supply isolation, data communication interfaces, motor control circuits, medical equipment isolation, and protecting sensitive digital circuits from industrial noise.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Optocoupler / Isolation Circuit](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/optocoupler-isolation-circuit)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: OPTOCOUPLER_ISOLATION_CIRCUIT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 96eec19f
