Board-dat/SCU/SCU1041-DAT/SCU1041-DAT.md
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# SCU1041 DAT
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+https://www.electrodragon.com/product/triac-switching-drive-board-optical-isolated-bt136/
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## Circuits
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Tech-dat/actuator-dat/TRIAC-dat/TRIAC-dat.md
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## thyristor = 可控硅
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-It is a type of semiconductor device used for controlling high-power electric signals, often in switching applications.
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+It is a type of semiconductor device used for controlling high-power electric signals, often in switching applications.
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+## MOC Triac driver
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+| Feature | MOC3020 (Random-Phase) | MOC3021 (Random-Phase) | MOC3063 (Zero-Cross) |
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+|-----------------------------|----------------------------------------------------------|----------------------------------------------------------|--------------------------------------------------------------|
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+| **Triggering Behavior** | Random-phase (non–zero–cross); triggers at any point in AC cycle | Random-phase (non–zero–cross); similar to MOC3020 but optimized for lower LED drive | Zero–cross; triggers only near the AC waveform’s zero point, reducing EMI and inrush current |
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+| **LED Trigger Current** | Typical trigger current ~30 mA | Typical trigger current ~15 mA | Optimized for zero–cross operation (exact value varies per datasheet) |
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+| **Applications** | Phase–control applications (lamp dimmers, motor controls) | Phase–control applications where a lower drive current is desired | AC switching (solid state relays, noise reduction, on/off control) |
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+| **Isolation Voltage** | 5,000 Vrms | 5,000 Vrms | 5,000 Vrms |
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+| **Off-State Output Voltage**| Minimum 400 V | Minimum 400 V | Minimum 400 V |
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+| **dV/dt Rating** | Typically ≥1000 V/µs | Typically ≥1000 V/µs | May be optimized for zero–cross switching (check datasheet for specifics) |