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Operating Voltage Range: Typically designed for 12–140 VAC, suitable for control of AC loads with a nominal line voltage around 110V.
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Current Rating: Models available for different current ratings, commonly from a few amps up to 25 amps or more in solid state relays.
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High Isolation Voltage: Optical isolation typically around 4,000 VRMS between input control and output load ensures electrical safety and noise immunity.
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Low Output Voltage Drop: Usually around 1.6 volts when switching load current to minimize power dissipation.
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Signal Input Requirements: Low control signal voltage (around 3 to 4 VDC), with low input current to trigger switching.
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Zero-Cross Switching: Often includes zero-voltage turn-on to reduce electrical noise and stress on the load.
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Thermal and Electrical Protection: Designed to handle transient surges and have built-in protection for extended reliability.
