The **W2AP-A34-R2/UL** is a high-performance, industrial-grade AC axial fan manufactured by **NMB Technologies (MinebeaMitsumi)**. It is designed for thermal management in heavy-duty environments, such as server racks, industrial control panels, and power supplies. --- ### ## Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 115 VAC (Standard Utility Power) | | **Frequency** | 50 / 60 Hz | | **Airflow** | ~91.8 CFM (Cubic Feet per Minute) | | **Speed** | 2,700 - 3,100 RPM | | **Noise Level** | ~40 - 44 dB | | **Power Consumption** | ~14 - 15 Watts | | **Bearing Type** | Dual Ball Bearing | | **Termination** | Lead Wires (2-wire) | | **Certifications** | UL Listed, CSA, CE, RoHS | --- ### ## Key Electronic & Mechanical Components ### 1. Motor Design The unit utilizes a **Shaded Pole Induction Motor**. This is common in AC fans because it is electronically simple, highly reliable, and does not require a start capacitor, reducing the risk of component failure over time. ### 2. Dual Ball Bearing System Unlike cheaper "sleeve bearing" fans, the **R2** designation typically refers to the high-quality **Dual Ball Bearing** construction. * **Advantage:** Supports much higher operating temperatures (up to 70°C). * **Longevity:** Rated for a significantly longer "Mean Time To Failure" (MTTF), often exceeding 50,000 to 100,000 hours. ### 3. Housing and Impeller * **Frame:** Cast Aluminum. This acts as a heat sink for the motor itself and provides structural rigidity to prevent vibration. * **Impeller:** Reinforced Polycarbonate (Plastic) or Metal (depending on the specific sub-variant), designed with an aerodynamic profile to maximize static pressure. ### 4. Thermal Protection The "UL" suffix indicates that the motor is **Impedance Protected**. This means that if the fan blades are physically obstructed (locked rotor), the internal resistance of the motor windings prevents the current from rising to a level that would cause a fire or melt the insulation. --- ### ## Wiring Diagram (Standard AC) Since this is a standard AC component, the wiring is straightforward: ```text [ Power Source 115V ] | +---- (Black Wire) ----> [ Fan Motor ] | +---- (Black Wire) ----> [ Fan Motor ] ``` *(Note: In AC shaded-pole fans, polarity is generally not a concern for operation, though grounding the metal frame to the chassis is recommended for safety.)* ---