Description
The ebm-papst R2S133-AE77-27 (also known as R2S133AE7727) is an unhoused, single-intake backward-curved motorized impeller powered by an integrated M2S052-CA shaded-pole AC motor. Engineered with a compact 133 mm (5.24 in) diameter, it delivers an aerodynamic free-air delivery up to 165 CFM (280 m³/h) operating on 115 VAC at 50/60 Hz with rotational speeds reaching 3150 RPM. The rugged assembly features seven aerodynamic blades molded from PA6 glass-fiber reinforced plastic, precision maintenance-free dual ball bearings, and built-in internal thermal overload protection (TOP). Designed for continuous S1 duty across demanding thermal environments, electrical connection is facilitated via factory-terminated AWG 20 lead wires with crimped splices.
Key Features
- Aerodynamic Impeller Design: Seven backward-curved blades engineered from glass-fiber reinforced PA6 plastic ensure high efficiency and low acoustic turbulence.
- Integrated Motor Engineering: Powered by a durable M2S052-CA single-phase motor supporting continuous S1 duty in any mounting orientation.
- Dual Ball Bearing System: Precision maintenance-free ball bearings deliver extended operating life across wide ambient temperature ranges.
- Built-In Thermal Protection: Internally wired thermal overload protector automatically guards the winding against locked-rotor and over-temperature faults.
- Versatile Mounting Architecture: Compact unhoused footprint incorporates rotor-side condensation drainage holes and flexible mechanical installation positions.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | R2S133-AE77-27 |
| Alternate Part Number | R2S133AE7727 |
| Integrated Motor Model | M2S052-CA |
| Product Series | R2S133 |
| Product Category | AC Centrifugal Fans |
| Fan / Component Type | Motorized Impeller (Unhoused Backward-Curved) |
| Phase & Supply Type | 1~ Single-Phase AC |
| Rated Voltage | 115 VAC |
| Frequency | 50 / 60 Hz |
| Speed (RPM) | 2790 RPM (50 Hz) / 3150 RPM (60 Hz) |
| Power Consumption | 35 W (50 Hz) / 34 W (60 Hz) |
| Current Draw | 0.48 A (50 Hz) / 0.41 A (60 Hz) |
| Starting Current | 0.75 A (50 Hz) / 0.62 A (60 Hz) |
| Airflow | 165 CFM (280 m³/h at 50 Hz, Free Air) |
| Min. Back Pressure | 0 Pa (0 in H₂O) |
| Impeller Diameter | 133 mm (5.24 in) |
| Number of Blades | 7 |
| Overall Thickness / Depth | 91.00 mm (3.58 in) |
| Impeller Material | PA6 Plastic, Glass-Fiber Reinforced |
| Bearing Type | Maintenance-Free Ball Bearings |
| Direction of Rotation | Clockwise, viewed toward rotor |
| Installation Position | Any |
| Condensation Drainage Holes | On rotor side |
| Operating Mode / Duty Cycle | S1 (Continuous) |
| Weight | 0.86 kg (1.90 lbs) |
| Screw Penetration Depth | Max. 5.0 mm clearance for screw |
| Termination & Cable Specs | 2 Lead Wires, AWG 20 with Crimped Splices |
| Wiring Pinout / Connection | Blue = Line (L), Brown = Neutral (N) |
| Motor Protection | Thermal Overload Protector (TOP) internally connected |
| Electrical Protection Class | Class I (with customer protective earth) |
| Touch Current (IEC 60990) | < 0.75 mA (Measuring Circuit Fig. 4, TN system) |
| Insulation Class | Class B |
| Ingress Protection (IP) | IP22 (installation- and position-dependent) |
| Operating Temperature | -25 °C to +40 °C (-13 °F to +104 °F at 50 Hz) / -25 °C to +45 °C (-13 °F to +113 °F at 60 Hz) |
| Storage / Transport Temperature | -40 °C to +80 °C (-40 °F to +176 °F) |
| Optional Accessory | Inlet ring part no. 09566-2-4013 |
| Standards & Compliance | CE, EN 60335-1, CSA C22.2 No. 100, UL 1004-1, RoHS |
Applications
The ebm-papst R2S133-AE77-27 motorized centrifugal impeller is engineered for forced-air thermal management in compact industrial electronics cabinets, cleanroom fan filter units (FFUs), and commercial heat recovery ventilation (HRV) systems. Its high static pressure capability makes it well-suited for ducted air purifiers, fume extraction arms, medical diagnostic analyzers, and telecommunication power shelters. Maintenance and engineering teams frequently integrate this impeller as an OEM replacement within laboratory drying chambers, UV curing machinery, and environmental test chambers.
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