Isolation Relay / Solid-State Switch
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This page explains how Optocoupler/Transformer 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 provides electrical isolation and signal transmission between circuits using light or magnetic coupling.
Technical details and manufacturing context for Optocoupler/Transformer
| 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=5 mA, VCE=5V; affects signal integrityIEC 60747-5-5 |
| Collector-Emitter Saturation Voltage | 0.1–0.4 V | Low value ensures low power dissipationIEC 60747-5-5 |
| Bandwidth | 0.1–10 MHz | For high-speed digital isolation |
| Propagation Delay | 0.1–10 μs | Critical for timing-sensitive circuits |
| Operating Temperature Range | -40–85 °C | Extended range for industrial applicationsIEC 60747-5-5 |
| Input Forward Voltage | 1.2–1.5 V | At IF=10 mA; affects drive circuit design |
| Input Reverse Voltage | 5–6 V | Maximum reverse voltage across LED |
| Output Collector Current | 50–100 mA | Maximum continuous current |
| Isolation Resistance | 10^10–10^12 Ω | At 500 V DC; high value ensures safetyIEC 60747-5-5 |
| Coupling Capacitance | 0.5–2.0 pF | Low capacitance improves common-mode rejection |
| Package Type | DIP-4–DIP-8 | Through-hole or SMD variants availableJEDEC MS-001 |
| Creepage Distance | 7–10 mm | For reinforced insulation in pollution degree 2IEC 60664-1 |
| Clearance Distance | 5–8 mm | Minimum air gap for safetyIEC 60664-1 |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
Commonly used trade names and technical identifiers for Optocoupler/Transformer.
This component is essential for the following industrial systems and equipment:
| pressure: | Not applicable (solid-state component, no pressure rating) |
| other spec: | Isolation voltage: 1kV to 10kV (depends on model), Frequency range: DC to 1MHz (for optocouplers), DC to 10MHz (for transformers) |
| temperature: | -40°C to +125°C (operating range, varies by 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/Transformer.
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A practical evidence checklist for RFQ preparation and supplier evaluation.
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An optocoupler uses light to transmit signals across an isolation barrier, while a transformer uses electromagnetic induction. Both provide galvanic isolation, but optocouplers are typically used for DC or low-frequency signals, whereas transformers are suited for AC or higher-frequency applications.
Consider the signal type, frequency, required isolation voltage, and package constraints. Optocouplers are often preferred for digital signals and compact designs, while transformers may be better for power transfer or high-frequency analog signals. Always verify parameters against your application requirements.
Isolation voltage is the maximum voltage that can be applied between input and output without breakdown. It ensures safety and prevents damage to low-voltage circuits. For reinforced insulation in mains applications, values like 3750–5000 Vrms are typical, but confirm the exact rating for your model.
Check the datasheet for parameters such as current transfer ratio, propagation delay, and isolation resistance. Test under your operating conditions, and ensure compliance with relevant standards like IEC 60747-5-5. Always consult the manufacturer for model-specific data.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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