The **W2AC-A12B-R/N** is a specific model identifier typically associated with **AC Axial Fans**, often manufactured by companies like **Wanduan** or similar industrial cooling solution providers. These fans are designed for thermal management in server racks, electrical cabinets, and industrial machinery. Below is a breakdown of its technical specifications and electronic components. --- ### 1. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 220V - 240V AC | | **Frequency** | 50/60 Hz | | **Input Power** | ~22W - 30W (typical for this series) | | **Bearing Type** | Dual Ball Bearing (indicated by "B") | | **Rotation Speed** | 2,500 - 3,000 RPM | | **Airflow** | ~80 - 105 CFM | | **Noise Level** | ~43 - 48 dB-A | --- ### 2. Key Electronic & Mechanical Parts #### A. The Motor Structure (Shaded Pole vs. Capacitor Run) Most fans in this category use a **Shaded Pole Induction Motor** or a **Permanent Split Capacitor (PSC) motor**. * **Stator:** Laminations of silicon steel wound with copper wire to create an electromagnetic field. * **Rotor:** A squirrel-cage rotor made of aluminum/copper bars embedded in a steel core. #### B. The Bearing System ("B") The "B" in the model name usually signifies **Ball Bearings**. * **Longevity:** Ball bearings are rated for much higher MTBF (Mean Time Between Failures) than sleeve bearings, typically around 50,000 to 70,000 hours. * **Orientation:** Unlike sleeve bearings, ball bearings allow the fan to be mounted in any orientation (horizontal, vertical, or angled) without affecting lifespan. #### C. Housing and Impeller * **Frame:** Usually made of **Die-cast Aluminum** treated with black anti-corrosion coating. This acts as a heat sink for the motor. * **Blades:** Typically made of **PBT (Polybutylene Terephthalate)**, a glass-fiber reinforced plastic that is flame retardant (UL94V-0). #### D. Connection Interface ("R/N") * **Lead Wires:** The "R/N" suffix often indicates the wiring configuration. * **Protection:** These fans usually feature **Impedance Protection**, meaning the motor is designed to resist burning out even if the rotor is locked (stalled) for an extended period. --- ### 3. Dimensional Drawing (Standard 12038) This model usually follows the **120mm x 120mm x 38mm** industry standard footprint. ```text 120mm +-----------+ | ( O ) | <-- Impeller | | +-----------+ 38mm Thickness ``` --- ### 4. Typical Applications 1. **Server Racks:** Exhausting hot air from network enclosures. 2. **Power Supplies:** Cooling large UPS systems or industrial transformers. 3. **HVAC Units:** Small-scale ventilation in control panels. 4. **Dryers/Heaters:** Circulating air through heating elements.