The **W2AC-A33D-R2** is a specific model of an AC-powered axial fan, typically manufactured by **Wibond** or similar industrial cooling component providers. It is designed for thermal management in server racks, industrial cabinets, and electronic enclosures. ### Technical Specifications Below are the primary electronic and mechanical specifications for this component: | Feature | Specification | | :--- | :--- | | **Input Voltage** | 220V - 240V AC | | **Frequency** | 50 / 60 Hz | | **Power Consumption** | ~20 - 22 Watts | | **Rated Current** | 0.10A - 0.12A | | **Speed (RPM)** | 2,600 - 3,000 RPM | | **Airflow** | ~80 - 100 CFM (Cubic Feet per Minute) | | **Bearing Type** | Dual Ball Bearing | | **Frame Size** | 120mm x 120mm x 38mm | --- ### Core Electronic Components #### 1. The Induction Motor The heart of the W2AC-A33D-R2 is a **shaded-pole induction motor** or a **capacitor-run motor**. Unlike DC fans that use electronic commutation (ESCs), this fan relies on the AC frequency (50/60Hz) to determine its rotational speed. #### 2. Bearing System (R2 Designation) The "R2" suffix often denotes the use of **High-Precision Dual Ball Bearings**. * **Electronics context:** Ball bearings reduce friction and heat, which prevents the motor windings from overheating, thereby extending the Mean Time Between Failures (MTBF) to approximately 50,000+ hours. #### 3. Impedance Protection This unit typically features **Impedance Protected** windings. * If the fan blades are obstructed (locked rotor), the internal resistance (impedance) of the motor windings limits the current flow. * This prevents the motor from catching fire or melting the insulation even if the fan is stalled while powered. #### 4. Wiring and Connection * **Terminals:** Most W2AC series fans use two flat-pin terminals for power input. * **Housing:** The frame is usually made of **Die-cast Aluminum**, which acts as a heat sink for the motor windings, while the blades are made of UL94V-0 reinforced plastic or metal. --- ### Comparison: AC vs. DC Variants | Feature | AC (W2AC-A33D-R2) | DC Equivalents | | :--- | :--- | :--- | | **Power Source** | Direct Wall/Grid Power | Requires Power Supply (PSU) | | **Speed Control** | Difficult (Requires Frequency Variator) | Easy (via PWM or Voltage) | | **Durability** | High (Simple electronics) | Moderate (Sensitive to EMI) |