Description
ebm-papst K2E225-RA40-02 (also known as K2E225RA4002) is an industrial single-intake backward-curved RadiCal AC centrifugal blower module integrated with a rugged scroll housing and driven by the M2E068-DF external rotor motor. Operating on a 115 VAC single-phase line supply at 50/60 Hz, this 225 mm (8.86 in) aerodynamic unit delivers rated speeds up to 2700 RPM and power consumption up to 235 W. Built with fiberglass-reinforced PA plastic for both impeller and housing, the assembly incorporates dual precision ball bearings, rotor-side condensation drainage, and an internal thermal overload protector (TOP). Electrical power and run-capacitor leads are terminated via an integrated Tyco 4-pole keyed connector, ensuring reliable, continuous S1 duty across demanding thermal management environments.
Key Features
- Aerodynamic RadiCal Impeller: Optimized 7-blade backward-curved PA plastic geometry maximizes airflow efficiency while minimizing broadband acoustic emissions.
- Integrated Scroll Housing: Single-intake Polyamide housing structure ensures guided static pressure recovery and simplifies OEM mechanical installation.
- Internal Thermal Protection: Factory-wired thermal overload protector continuously shields the Class F winding from phase-fault overheating damage.
- Plug-in Connector System: Integrated Tyco 4-pole keyed plug provides secure, error-free wiring termination for rapid assembly and field maintenance.
- Industrial Reliability: Robust dual ball bearings and IP44 environmental sealing ensure dependable continuous S1 operation down to -25°C.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | K2E225-RA40-02 |
| Alternate Part Number | K2E225RA4002 |
| Integrated Motor Model | M2E068-DF |
| Product Series | RadiCal (K2E225) |
| Product Category | AC Blower Fans |
| Fan / Component Type | AC Centrifugal Module with Housing (Backward-Curved, Single-Intake) |
| Phase & Supply Type | Single-Phase (1~) AC |
| Rated Voltage | 115 VAC |
| Frequency | 50 Hz / 60 Hz |
| Speed (RPM) | 2550 RPM (50 Hz) / 2700 RPM (60 Hz) |
| Power Rating | 165 W (50 Hz) / 225 W (60 Hz CE) / 235 W (60 Hz UL 2111) |
| Rated Current | 1.47 A (50 Hz) / 1.95 A (60 Hz CE) / 1.97 A (60 Hz UL 2111) |
| Starting Current | 2.9 A (50 Hz) / 2.7 A (60 Hz CE) / 2.8 A (60 Hz UL 2111) |
| Run Capacitor | 14 µF / 250 VDB (S0 CE / UL Approved) |
| Min. Back Pressure | 0 Pa (0.0 in H₂O) |
| Fan / Impeller Size | Ø 225 mm (8.86 in) |
| Number of Blades | 7 |
| Dimensions (L × H × D) | 270 × 270 × 112.0 mm (10.63 × 10.63 × 4.41 in) |
| Housing Material | PA Plastic (Polyamide) |
| Impeller Material | PA Plastic (Polyamide) |
| Rotor Surface | Painted Black |
| Bearing Type | Maintenance-Free Ball Bearings |
| Direction of Rotation | Clockwise, viewed toward rotor |
| 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 | 3.2 kg (7.0 lbs) |
| Electrical Hookup / Termination | Tyco coded plug system (4-pole housing 926305-7, 4x pin 926 885-1) |
| Compatible Mating Connector | Tyco 926298-6 4-pole housing with 4x 926 884-1 sockets (not included) |
| Wiring Pinout / Assignment | Pin 1.1: PE (Green/Yellow) | Pin 1.2: L (Z Brown / U2 Black) | Pin 1.3: N + Capacitor (U1 Blue) | Pin 1.4: Capacitor |
| 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 (TN System, Measuring Circuit Fig. 4) |
| Insulation Class | Class F |
| Ingress Protection (IP Rating) | IP44 (installation- and position-dependent as per EN 60034-5) |
| Moisture / Environmental Class | H0+ |
| Operating Temperature Range | -25 to +60 °C (-13 to +140 °F) |
| Storage / Transport Temperature Range | -40 to +80 °C (-40 to +176 °F) |
| Standards & Compliance | EN 60335-1, CE, CCC, UL 2111, CSA C22.2 No. 77, RoHS3 |
Applications
The ebm-papst K2E225-RA40-02 centrifugal blower module is engineered for forced-air cooling and ducted ventilation across commercial HVAC air handling units, VAV terminal boxes, and heat recovery ventilators. It is extensively installed in telecom outdoor base station enclosures, power supply rectifiers, and industrial inverter cabinets where high back pressure must be overcome. Facilities engineering and OEM maintenance teams also rely on this housed unit for semiconductor processing stations, drying tunnels, and cleanroom air filtration systems.
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