Solid State Relay
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This page explains how Thyristor/Triac is classified within Electrical Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A semiconductor switching device used for controlling AC power in solid state relays.
Technical details and manufacturing context for Thyristor/Triac
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Rated Voltage | 600–1600 V | Maximum repetitive peak off-state voltageIEC 60747-6 |
| Rated Current | 10–200 A | RMS on-state current at specified case temperatureIEC 60747-6 |
| Gate Trigger Current | 5–100 mA | Minimum gate current required for triggeringIEC 60747-6 |
| Holding Current | 10–50 mA | Minimum anode current to maintain conductionIEC 60747-6 |
| On-State Voltage | 1.2–1.8 V | Voltage drop at rated currentIEC 60747-6 |
| Critical Rate of Rise of Off-State Voltage | 200–1000 V/µs | Maximum dv/dt without false triggeringIEC 60747-6 |
| Critical Rate of Rise of On-State Current | 50–200 A/µs | Maximum di/dt during turn-onIEC 60747-6 |
| Operating Temperature Range | -40–125 °C | Junction temperature range for reliable operationIEC 60747-6 |
| Isolation Voltage | 2500–5000 V RMS | RMS isolation voltage between terminals and baseIEC 60747-6 |
| Thermal Resistance (Junction to Case) | 0.1–1.0 K/W | Lower is better for heat dissipationIEC 60747-6 |
| Package Type | TO-220, TO-247, ISOTOP | Affects mounting and thermal performance |
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:
| pressure: | Not applicable (solid-state device) |
| other spec: | Voltage: 200V to 1600V, Current: 1A to 100A, dv/dt: 50V/μs to 1000V/μs, di/dt: 20A/μs to 500A/μs |
| temperature: | -40°C to +125°C (junction temperature) |
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.
2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.
A practical evidence checklist for RFQ preparation and supplier evaluation.
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A thyristor (SCR) conducts current in one direction only, while a triac can conduct in both directions, making it suitable for AC switching. Both are used in solid state relays, but triacs are more common for AC loads.
Key parameters include rated voltage, rated current, gate trigger current, holding current, on-state voltage, critical rate of rise of off-state voltage and current, operating temperature range, isolation voltage, and thermal resistance. These must be matched to the load and application requirements.
The gate trigger current is the minimum gate current required to turn on the device. It influences the design of the control circuit, as the SSR must supply sufficient gate current to ensure reliable triggering.
Isolation voltage indicates the electrical isolation between the input and output circuits. It ensures safety and prevents interference, especially in industrial environments where high voltages are present.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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