The **W2AC-A31B-R2/Q** is a specialized high-performance industrial cooling fan assembly, typically manufactured by **Sanyo Denki** (San Ace series). It is an AC-powered axial fan designed for high-reliability environments such as server racks, power supplies, and industrial control cabinets. --- ### 1. Technical Specifications Below are the primary electronic and mechanical characteristics of the unit: | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 200V - 230V AC (50/60Hz) | | **Frame Size** | 120mm x 120mm x 38mm | | **Bearing Type** | Dual Ball Bearing | | **Material** | Aluminum Frame / Plastic Impeller (UL 94V-0) | | **Power Consumption** | ~14W - 18W (Model dependent) | | **Speed** | ~2600 - 2900 RPM | | **Airflow** | Approx. 90 - 105 CFM | | **Termination** | Lead Wires (Terminal types vary by suffix) | --- ### 2. Key Electronic Components & Features #### A. Shaded Pole or Capacitor-Run Motor As an AC fan, it utilizes a brushless AC motor. Unlike DC fans that use a PCB with hall-effect sensors, this AC model relies on electromagnetic induction. The "R2" designation often implies a specific winding configuration optimized for 230V efficiency. #### B. Dual Ball Bearing System The "Electronic" longevity of the part is supported by its mechanical bearing. Ball bearings are used to: * Ensure operation at high temperatures (up to 70°C). * Provide a long MTBF (Mean Time Between Failure) of approximately 40,000 to 60,000 hours. #### C. Thermal Protection Most models in this series include **Impedance Protection**. This ensures that if the fan blades are locked (prevented from turning), the internal coil resistance prevents the motor from overheating and catching fire. #### D. Environmental Compliance (/Q Suffix) The `/Q` suffix often denotes specific quality control standards or environmental certifications: * **RoHS Compliance:** Lead-free construction. * **Safety Approvals:** UL, CSA, and TUV certifications for global industrial use. --- ### 3. Application Use Cases * **Power Inverters:** Dissipating heat from high-voltage transformers. * **Enclosures:** Maintaining airflow in NEMA-rated industrial cabinets. * **Networking:** Cooling for enterprise-grade switches and routers.