The HHT3 Series is used for phase-angle AC voltage and power regulation in heating, lighting and other resistive load-control applications. It includes 220VAC and 380VAC versions, with control options for analog voltage, analog current or manual potentiometer adjustment depending on the selected model.
Common Parameters
| Regulation method | Phase-angle / phase-shift output |
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| Control input options | 0-5VDC, 0-10VDC, 4-20mA and manual potentiometer control, depending on model |
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| Load voltage code | 22: 220VAC; 38: 380VAC |
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| Isolation | Active type, fully isolated |
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| Off-state leakage current | ≤10mA |
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| Dielectric strength | ≥2000VAC |
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| Installation | Bolt installation |
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| Cooling note | Use a heat sink above 5A; use fan or water cooling above 80A where specified |
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HHT3-3 / HHT3-3-38
| Rated voltage | 380VAC |
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| Voltage regulation range | 0-380VAC |
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| Phase shift range | 0-150° |
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| Load current | 25A, 40A, 75A, 100A, 125A, 150A, 180A |
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| Dimensions | 106.4×75.4×43.3mm |
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HHT3-5 / HHT3-5-22
| Rated voltage | 220VAC |
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| Voltage regulation range | 0-220VAC |
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| Phase shift range | 0-180° |
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| Load current | 25A, 40A, 75A, 100A, 125A, 150A, 180A |
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| Dimensions | 106.4×75.4×43.3mm |
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HHT3-338 / HHT3-U-38
| Control mode | 0-5VDC, 0-10VDC or 4-20mA |
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| Load voltage code | 38: 380VAC |
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| Voltage regulation range | 10-440VAC |
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| Load current | 10A, 20A, 30A, 40A, 100A |
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| Dimensions | 106×75×35mm |
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HHT3-U / HHT3-U-22
| Control mode | 0-5VDC, 0-10VDC or 4-20mA |
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| Load voltage code | 22: 220VAC |
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| Voltage regulation range | 10-250VAC |
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| Load current | 10A, 20A, 30A, 40A, 100A |
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| Dimensions | 106×75×35mm |
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