Fans
Fans R4D450-AA04-05 400mm 650W blower
Centrifugal blower with 400 mm impeller, 650 W three-phase motor, 1375 rpm speed and airflow up to 35000 m³/h
- 650 W power for strong airflow up to 35000 m³/h
- External rotor motor gives compact design with forced electronic cooling
- 100 % speed control via analog or serial interface
- Operates from -40 °C to 50 °C ambient temperature
- Sturdy steel-plate construction for industrial durability
Industrial blower for HVAC systems
The Fans R4D450-AA04-05 is a 400 mm centrifugal blower rated at 650 W for three-phase 230 V or 400 V supplies. It delivers airflow up to 35000 m³/h at 1375 rpm and operates from -40 °C to 50 °C. The external-rotor motor design provides forced electronic cooling in a compact steel housing suitable for demanding ventilation duties.
Verify voltage wiring and control interface
Confirm your supply is three-phase 230 V wired in Y or 400 V as the motor requires. Current draw is 2.45 A at 230 V and 1.42 A at 400 V. The unit offers 100 % speed control via analogue or serial interface, so ensure your controller matches one of those signal types before installation.
Replaces worn centrifugal blowers in existing
This model suits installations needing a direct swap for a failed 400 mm backward-curved centrifugal fan with the same mounting pattern. The jump is worthwhile when the old unit can no longer maintain required static pressure or when variable-speed control is needed for energy savings. It is not for buyers who need a forward-curved scroll-housed fan or a smaller diameter impeller.
Highlights
- 650 W power for strong airflow up to 35000 m³/h
- External rotor motor gives compact design with forced electronic cooling
- 100 % speed control via analog or serial interface
- Operates from -40 °C to 50 °C ambient temperature
- Sturdy steel-plate construction for industrial durability
Specifications
No published specifications for this item yet.
Questions about this item
Does the R4D450-AA04-05 blower ship with a scroll housing or must one be sourced separately?
The supplier description notes that backward-curved models such as this are designed as free-wheeling fans and do not require a scroll housing, so none is included.
Should I select the 230 VAC or 400 VAC wiring for my three-phase supply?
Both 230 VAC and 400 VAC three-phase options are listed; choose the one that matches your site voltage — 230 VAC draws 2.45 A while 400 VAC draws 1.42 A at 650 W.
What does the 650 W power rating mean for actual airflow in a live system?
At 650 W and 1375 rpm the fan can deliver up to 35000 m³/h, though installed airflow will depend on the back-pressure of the ductwork it serves.
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