The **W2AC-A42B-R** is a specific model of an AC axial fan, typically manufactured by **Wintek** (or similar cooling solution providers). It is designed for high-performance thermal management in industrial equipment and server racks. --- ### 1. Technical Specifications The table below outlines the primary electronic and mechanical parameters for this component: | Feature | Specification | | :--- | :--- | | **Voltage** | 220V - 240V AC | | **Frequency** | 50 / 60 Hz | | **Input Power** | ~22 Watts to 25 Watts | | **Speed** | 2,400 - 2,700 RPM | | **Airflow** | ~90 - 105 CFM (Cubic Feet per Minute) | | **Bearing Type** | Dual Ball Bearing | | **Noise Level** | ~43 - 48 dB(A) | | **Frame Material** | Die-cast Aluminum | --- ### 2. Key Electronic Components & Features #### A. Induction Motor (Shaded Pole) The unit utilizes an AC induction motor. Unlike DC fans that require a PCB with a controller and Hall sensors, this AC fan relies on the frequency of the power line (50/60Hz) to determine its synchronous speed. #### B. Dual Ball Bearing System The "B" in the suffix usually denotes **Ball Bearings**. - **Longevity:** Rated for 50,000+ hours of continuous operation. - **Orientation:** Unlike sleeve bearings, ball bearings allow the fan to be mounted in any orientation (horizontal, vertical, or angled) without affecting lifespan. #### C. Impedance Protection The motor is **Impedance Protected**. This is a critical safety feature: - If the fan blades are physically obstructed (locked rotor), the internal impedance of the windings limits the current flow. - This prevents the motor from overheating or catching fire during a stall condition. #### D. Termination - **Terminals/Wires:** Usually features two lead wires (Line and Neutral) or spade terminals for quick connection. - **Grounding:** The aluminum frame typically includes a grounding point to prevent electrostatic discharge (ESD) or electrical shock. --- ### 3. Application Use-Cases * **Industrial Control Panels:** Heat dissipation for PLCs and Power Supplies. * **Server Racks:** Maintaining airflow in 19-inch enclosures. * **Power Inverters:** Cooling large capacitors and MOSFET heatsinks. ---