The **W2AC-AA2A-R2** is a high-performance AC fan, typically part of the W2E series manufactured by **ebm-papst**. This specific model is an axial fan designed for industrial cooling applications, characterized by its compact size and high air throughput. --- ### 1. Technical Specifications The electronic and physical characteristics of the W2AC-AA2A-R2 are summarized below: | Feature | Specification | | :--- | :--- | | **Motor Type** | AC external rotor motor (Capacitor motor) | | **Nominal Voltage** | 230 VAC | | **Frequency** | 50 / 60 Hz | | **Power Consumption** | ~38 W to 45 W (Load dependent) | | **Speed (RPM)** | 2800 – 3250 RPM | | **Airflow** | ~425 m³/h (approx. 250 CFM) | | **Bearing Type** | Ball Bearings | | **Material** | Die-cast aluminum housing; Steel sheet impeller | --- ### 2. Key Electronic Components The internal electronics of this unit are designed for durability and continuous operation: * **External Rotor Motor:** Unlike standard motors where the rotor is inside the stator, the rotor of this fan rotates *around* the stator. This design allows for a more compact footprint and better cooling of the motor coils themselves. * **Integrated Capacitor:** This is a single-phase AC motor that requires a run capacitor to create a phase shift, allowing the motor to start and maintain direction. * **Thermal Overload Protection:** The windings are typically equipped with an impedance protection or a thermal switch to prevent the motor from burning out if the impeller is stalled. * **Connection Interface:** Usually features 2 or 3 lead wires (Phase, Neutral, and sometimes Earth) or flat plug terminals for easy integration into industrial cabinets. --- ### 3. Application Use-Cases Due to its robust construction, the W2AC-AA2A-R2 is commonly found in: 1. **Server Racks:** Dissipating heat from high-density computing hardware. 2. **Industrial Control Cabinets:** Preventing overheating of PLCs and Power Supplies. 3. **Medical Equipment:** Cooling high-precision diagnostic tools. 4. **Telecommunications:** Cooling base stations and outdoor enclosures. --- ### 4. Mounting and Dimensions * **Size:** Approximately 150mm x 172mm x 38mm (Oval/Rectangular hybrid shape). * **Airflow Direction:** Typically exhaust over struts (though this can vary by specific sub-variant).