Description
The ebm-papst R2E250-AC09-05 (also known as R2E250AC0905) is a single-inlet, unhoused backward-curved AC centrifugal motorized impeller powered by an integrated M2E068-GA single-phase motor with an impeller diameter of 250 mm (9.84 in). Engineered for high aerodynamic efficiency against static back pressure, it operates on 230 VAC at 50 Hz to deliver a free-air flow rate of 970 CFM (1645 m³/h) at 2650 RPM with a rated power draw of 265 W. Robust mechanical construction includes a 16-blade hot-dip galvanized sheet steel impeller, maintenance-free dual ball bearings, internally wired thermal overload protection (TOP), and an axial PVC 4G0.5 mm² lead cable rated for IP44 installation.
Key Features
- Aerodynamic Delivery: High-efficiency backward-curved 16-blade impeller delivers up to 970 CFM (1645 m³/h) free air and 1.61 in H₂O (400 Pa) peak static pressure.
- Galvanized Impeller Architecture: Heavy-duty hot-dip galvanized sheet steel construction resists mechanical stress and corrosive environmental degradation during continuous high-speed rotation.
- Capacitor-Run Motor: Integrated M2E068-GA single-phase external rotor motor paired with an 8 µF 400 VDB capacitor provides smooth, high-torque S1 continuous duty.
- Integrated Motor Safety: Internal thermal overload protector automatically cuts line power under abnormal thermal rise, paired with Class I protective grounding.
- Flexible Mechanical Mounting: Unhoused symmetrical motorized impeller mounts in any physical orientation with dual maintenance-free ball bearings and IP44 environmental ingress protection.
- Pre-Terminated Wiring Harness: Factory-attached axial 4G0.5 mm² PVC cable with crimped splices enables direct single-phase line and capacitor hookup.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | R2E250-AC09-05 |
| Alternate Part Number | R2E250AC0905 |
| Item Number | 10867-5-9980 |
| Integrated Motor Model | M2E068-GA |
| Product Category | AC Centrifugal Fans |
| Fan / Component Type | Motorized Impeller (Unhoused Backward-Curved) |
| Intake Configuration | Single-Intake |
| Phase & Supply Type | 1~ Single-Phase AC |
| Rated Voltage | 230 VAC |
| Frequency | 50 Hz |
| Speed (RPM) | 2650 RPM (Free Air) / 2515 to 2575 RPM (Under Load) |
| Power Rating | 265 W |
| Max. Power Consumption | 320 W (at Max. Efficiency / Load) |
| Rated Current | 1.16 A |
| Max. Current Draw | 1.39 A (at Max. Load) |
| Run Capacitor | 8 µF / 400 VDB |
| Capacitor Safety Standard | S2 (CE) |
| Airflow | 970 CFM (1645 m³/h) |
| Min. Back Pressure | 0 in H₂O (0 Pa) |
| Max. Static Pressure | 1.61 in H₂O (400 Pa) |
| Impeller Size | Ø 250 mm (9.84 in) |
| Number of Blades | 16 |
| Impeller Material | Sheet steel, hot-dip galvanized |
| Rotor Surface | Unpainted |
| Bearing Type | Ball bearing |
| Direction of Rotation | Clockwise, viewed toward rotor |
| Installation Position | Any |
| Condensation Drainage Holes | None |
| Operating Mode / Duty Cycle | S1 Continuous Duty |
| Weight | 3.9 kg (8.60 lbs) |
| Termination & Cable Specs | Axial PVC 4G0.5 mm² cable, 4x crimped splices |
| Max. Screw Insertion Depth | 5 mm (0.20 in) max. clearance for screw |
| Wiring Pinout / Connection | U1 = Blue, Z = Brown, U2 = Black, PE = Green/Yellow |
| Motor Protection | Thermal overload protector (TOP) internally connected |
| Electrical Protection Class | Class I (with customer connection of protective earth) |
| Touch Current (IEC 60990) | < 0.75 mA (Measuring circuit Fig. 4, TN system) |
| Insulation Class | Class B |
| Moisture / Environmental Class | H0 – dry environment |
| Ingress Protection (IP) | IP44 (installation- and position-dependent) |
| Operating Temperature | -25 to +30 °C (-13 to +86 °F) |
| Storage Temperature | -40 to +80 °C (-40 to +176 °F) |
| Standards & Compliance | EN 60335-1, CE |
Applications
The ebm-papst R2E250-AC09-05 unhoused backward-curved centrifugal fan is specifically engineered for high-impedance industrial air handling and precision thermal management systems. It is widely installed in cleanroom fan filter units (FFUs), compact air filtration plenums, and commercial heat recovery ventilation (HRV) systems requiring stable pressure development. Plant maintenance engineers and OEMs also deploy this motorized impeller across telecom enclosure climate control systems, data center cooling cabinets, and industrial drying tunnels.
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