Description
The ebm-papst R2S175-AB56-30 (also known as R2S175AB5630) is an unhoused backward-curved AC motorized centrifugal impeller engineered around an external rotor M2S052-CA shaded-pole motor with a compact Ø175 mm × 62.2 mm (6.89 in × 2.45 in) footprint. Powered by a single-phase 230 VAC (60 Hz) line, this precision blower unit operates at 2300 RPM, drawing 51 W and 0.29 A to deliver 253.0 CFM (430.0 m³/h) of robust airflow against system backpressure. Constructed with an aerodynamically optimized 7-blade PA plastic impeller, a black-coated rotor, and maintenance-free dual ball bearings, it features an internally wired thermal overload protector (TOP) and three AWG 20 flexible lead splices for dependable continuous S1 operation in tight spaces.
Key Features
- Aerodynamic Impeller Geometry: Seven backward-curved blades engineered in durable PA plastic optimize laminar airflow and system static pressure.
- External Rotor Drive: Integrated M2S052-CA motor delivers compact packaging and balanced rotational dynamics across all mounting orientations.
- Internal Thermal Protection: Factory-wired automatic-reset thermal overload protector (TOP) shields motor windings against unexpected locked-rotor thermal damage.
- Dual Precision Ball Bearings: Maintenance-free, long-life ball bearing system rated for continuous S1 duty in industrial ambient environments.
- Flexible Power Harness: Pre-stripped AWG 20 PVC lead wires with integrated protective earth conductor simplify field connection.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | R2S175-AB56-30 |
| Alternate Part Number | R2S175AB5630 |
| Integrated Motor Model | M2S052-CA |
| Product Series | R2S175 |
| Product Category | AC Centrifugal Fans |
| Fan / Component Type | Motorized Centrifugal Impeller (Without Housing) |
| Phase & Supply Type | 1~ Single-Phase AC |
| Rated Voltage | 230 VAC |
| Frequency | 60 Hz |
| Speed (RPM) | 2300 RPM |
| Power Rating | 51 W |
| Rated Current | 0.29 A |
| Airflow | 253.0 CFM (430.0 m³/h) |
| Min. Back Pressure | 0 Pa (0.0 in H₂O) |
| Noise Level | 54.0 dB(A) |
| Impeller Size | Ø 175 mm (6.89 in), 7 Blades |
| Dimensions (Ø × D) | Ø 175 mm × 62.2 mm (Ø 6.89 in × 2.45 in) |
| Overall Assembly Depth | 69.0 mm (2.72 in) |
| Mounting Bolt Circle | 6× M4 on Ø 58.0 mm (2.28 in) Bolt Circle |
| Max. Screw Insertion Depth | 5.0 mm (0.20 in) |
| Motor Size | 52 |
| Rotor Surface | Painted black |
| Impeller Material | PA plastic |
| Bearing Type | Maintenance-free dual ball bearings |
| Direction of Rotation | Clockwise, viewed toward rotor |
| Installation Position | Any (universal 360°) |
| Condensation Drainage Holes | None, open rotor |
| Operating Mode / Duty Cycle | S1 (Continuous operation) |
| Weight | 0.9 kg (1.98 lbs) |
| Termination & Cable Specs | 3 Wire Leads, AWG 20 PVC, Splice Endings |
| Wiring Pinout / Connection | L = Black, N = Black, PE = Green/Yellow |
| Motor Protection | Thermal Overload Protector (TOP) internally connected |
| Electrical Protection Class | Class I (with customer protective earth connection) |
| Touch Current (IEC 60990) | < 0.75 mA (Measuring circuit Fig. 4, TN system) |
| Insulation Class | Class B |
| Ingress Protection (IP) | IP20 |
| Moisture / Environmental Class | H0+ |
| Operating Temperature | -25°C to +55°C (-13°F to +131°F) |
| Storage Temperature | -40°C to +80°C (-40°F to +176°F) |
| Permissible Ambient Air Pressure | 800 to 1050 mbar |
| Compatible Inlet Ring (Accessory) | 09576-2-4013 (optional, not included) |
| Standards & Compliance | CE, EN 60335-1, UL 507, RoHS3 Compliant |
Applications
ebm-papst R2S175-AB56-30 unhoused motorized impellers are deployed in compact industrial ventilation plenums, laboratory fume extraction arms, and electronic enclosure air-turn chambers. Engineers frequently integrate this backward-curved unit within telecommunications rectifier cooling ducts, medical diagnostic machinery, and commercial heat recovery ventilation subsystems. It also provides reliable drop-in service for MRO replacement across legacy power converter modules and automated packaging line thermal management stacks.
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