Input/Output Modules
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This page explains how Optocoupler / Isolation Circuit is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
An electronic component that transfers electrical signals between two isolated circuits using light, providing electrical isolation and noise immunity.
Technical details and manufacturing context for Optocoupler / Isolation Circuit
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Isolation Voltage | 3750–5000 Vrms | Minimum for reinforced insulation in mains applicationsIEC 60747-5-5 |
| Current Transfer Ratio | 50–600 % | At IF=5mA, VCE=5V; affects output drive capabilityIEC 60747-5-5 |
| Collector-Emitter Saturation Voltage | 0.1–0.4 V | Low VCE(sat) reduces power dissipationIEC 60747-5-5 |
| Input Forward Voltage | 1.2–1.5 V | Typical for GaAs LED at IF=10mAIEC 60747-5-5 |
| Bandwidth | 0.1–10 MHz | For digital signals; higher for high-speed optocouplers |
| Propagation Delay | 0.1–10 µs | Critical for timing in control loops |
| Operating Temperature Range | -40–85 °C | Extended range available for automotiveIEC 60747-5-5 |
| Creepage Distance | 7–10 mm | For reinforced insulation in pollution degree 2IEC 60664-1 |
| Package Type | DIP-4, SOP-4, SMD-4 | DIP for through-hole, SOP/SMD for surface mount |
| Input Current (Max) | 50–60 mA | Absolute maximum rating; derate at high temperature |
| Output Collector Current | 50–100 mA | Maximum continuous current through output transistor |
| Isolation Resistance | 10^10–10^12 Ω | At 500V DC; high resistance ensures isolation integrityIEC 60747-5-5 |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is essential for the following industrial systems and equipment:
| voltage: | Up to 5000Vrms isolation voltage |
| temperature: | -40°C to +125°C (operating range) |
| switching speed: | Up to 50MHz for high-speed variants |
| current transfer ratio: | 20% to 600% depending on model |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
Manufacturer profiles associated with Optocoupler / Isolation Circuit.
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A practical evidence checklist for RFQ preparation and supplier evaluation.
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It electrically isolates the control circuitry from field devices, preventing ground loops, suppressing noise, and protecting against voltage spikes and transients.
Typical isolation voltage ranges from 3750 to 5000 Vrms, as per IEC 60747-5-5, but actual ratings depend on the specific model and must be confirmed with the manufacturer.
CTR indicates the efficiency of signal transfer from input to output. A higher CTR means better output drive capability, but it varies with operating conditions and must be verified for the application.
Common package types include DIP-4 for through-hole mounting and SOP-4 or SMD-4 for surface mount. The choice depends on the PCB design and assembly process.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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