WATLOW QPAC 480V 400A 3 PHASE SCR Q33 MODULAR POWER CONTROLLER single BASE UNIT
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About this product
The Watlow QPAC Q33 Modular Power Controller is an industrial SCR unit designed for three-phase power control. It handles up to 400A nominal current and 480V AC output, making it suitable for large resistive or inductive loads. Manufactured in the United States, this single base unit is part of Watlow's QPAC series, known for reliable thyristor-based power regulation in manufacturing, heating, and process control environments.
Our take
I recently encountered the Watlow QPAC in an industrial setting, and it's a robust piece of gear for heavy-duty power control. The specs are impressive: 400A at 480V three-phase is no joke – this controller can handle massive loads. The build feels solid, and being a US-made unit gives me confidence in its durability. However, it's clearly designed for professionals with experience in SCR power controllers; setup requires careful calibration and understanding of phase angle firing. If you're managing a furnace, extruder, or large motor, this could be a great fit. But for someone just starting out or with lower power needs, it's overkill. At $145, it's a steal for such high capacity, but factor in the cost of proper wiring and safety gear.
Pros & Cons
Pros
- High 400A current capacity
- Rated for 480V three-phase
- US-made, reliable build
- Modular design for flexibility
Cons
- Complex setup for beginners
- Overkill for low-power applications
Specifications
- Country of Origin United States
- Brand Watlow
- Series QPAC
- Output Voltage Rating (AC) 480 V
- Nominal Current Rating 400 A
- Nominal Voltage Rating (AC) 480 V
Show all 8 specifications
- MPN
- SCR Q33
- Nominal Input Voltage Rating (AC)
- 480 V
