Description
ebm-papst W4S250-CA02-01 (also known as W4S250CA0201) is an industrial 230 VAC AC axial fan featuring an integrated M4S068-CF shaded-pole external rotor motor enclosed within a round full nozzle wall ring with a protective wire guard grille. Designed with a 250 mm (9.84 in) 5-blade painted sheet steel impeller, it delivers an aerodynamic airflow rate up to 510 CFM (870 m³/h) at 50 Hz and 590 CFM (1005 m³/h) at 60 Hz against static back pressures up to 0.40 in H₂O (100 Pa). Heavy-duty dual ball bearings, IP44 ingress protection, and an internal thermal overload protector (TOP) ensure dependable continuous S1 operation across harsh industrial thermal duty cycles. Electrical hookup is facilitated via an integrated lateral 3-conductor PVC cable (3G 0.5 mm²) terminated with factory-crimped splices.
Key Features
- Full Wall Nozzle Housing: Aerodynamically contoured galvanized steel round wall ring maximizes static intake pressure and reduces turbulence losses.
- Sheet Steel Impeller: Five rugged straight blades coated in black paint deliver robust mechanical strength in demanding industrial environments.
- Dual Ball Bearings: Heavy-duty motor ball bearing arrangement ensures extended operational life in continuous horizontal or vertical rotor-down orientations.
- Internal Thermal Protection: Integrated thermal overload protector safeguards the shaded-pole motor against high temperatures and locked rotor conditions.
- Factory Integrated Grille: Steel wire guard grille coated in durable black plastic provides essential finger protection and structural rigidity.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | W4S250-CA02-01 |
| Alternate Part Number | W4S250CA0201 |
| Integrated Motor Model | M4S068-CF |
| Product Series | W4S250 (A series) |
| Product Category | AC Axial Fans |
| Fan / Component Type | AC Axial Fan with Round Full Nozzle and Guard Grille |
| Phase & Supply Type | 1~ Single-Phase AC |
| Rated Voltage | 230 VAC |
| Frequency | 50 / 60 Hz |
| Speed (RPM) | 1400 RPM (50 Hz) / 1620 RPM (60 Hz) |
| Power Rating | 72 W (50 Hz) / 75 W (60 Hz UL) / 67 W (60 Hz CE) |
| Rated Current | 0.53 A (50 Hz) / 0.33 A (60 Hz UL) / 0.46 A (60 Hz CE) |
| Airflow | 510 CFM (870 m³/h at 50 Hz) / 590 CFM (1005 m³/h at 60 Hz) |
| Max. Back Pressure | 0.32 in H₂O (80 Pa at 50 Hz) / 0.40 in H₂O (100 Pa at 60 Hz) |
| Airflow Direction | V (Intake over struts / wall ring) |
| Direction of Rotation | Counterclockwise, viewed toward rotor |
| Impeller Size | Ø 250 mm (9.84 in) |
| Number of Blades | 5 |
| Blade Material | Sheet steel, painted black |
| Fan Housing Material | Sheet steel, galvanized and coated with black plastic (RAL 9005) |
| Guard Grille Material | Steel, coated with black plastic (RAL 9005) |
| Rotor Surface | Painted black |
| Bearing Type | Ball bearing |
| Installation Position | Shaft horizontal or rotor on bottom; rotor on top on request |
| Condensation Drainage Holes | On rotor side |
| Operating Mode / Duty Cycle | Continuous operation (S1) |
| Weight | 2.84 kg (6.26 lbs) |
| Termination & Cable Specs | Lateral cable PVC 3G 0.5 mm², 3x crimped splices |
| Wiring Pinout / Connection | L = Blue, N = Black, PE = Green/Yellow |
| Motor Protection | Thermal overload protector (TOP) internally connected |
| Touch Current (IEC 60990) | < 0.75 mA (TN system, measuring circuit Fig. 4) |
| Electrical Protection Class | Class I (if protective earth is connected by customer) |
| Insulation Class | Class B |
| Ingress Protection (IP) | IP44 |
| Moisture / Environmental Class | H1 |
| Operating Temperature Range | -25 to +40 °C (-13 to +104 °F at 50 Hz) / -25 to +50 °C (-13 to +122 °F at 60 Hz) |
| Storage / Transport Temperature Range | -40 to +80 °C (-40 to +176 °F) |
| Standards & Compliance | CE, EAC, UL, EN 60034-1, EN 60204-1, EN 60335-1, RoHS3 |
Applications
ebm-papst W4S250-CA02-01 is widely deployed in commercial refrigeration condensing units, heat pump evaporators, and industrial walk-in freezer air-cooling circuits. It serves as a direct-replacement exhaust and ventilation fan in factory electrical automation cabinets, power inverter enclosures, and transformer cooling housings. Additionally, this nozzle-mounted axial fan is utilized across food and beverage processing machinery, agricultural drying equipment, and HVAC duct ventilation plenums requiring reliable continuous duty.
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