The part number **W2AC-A4CA-R** refers to a high-performance, industrial-grade AC axial fan, typically manufactured by **Sanyo Denki** (San Ace series). This component is designed for thermal management in telecommunications, servers, and industrial control cabinets. ### 1. Technical Specifications Below are the primary electronic and mechanical characteristics of the W2AC-A4CA-R: | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 200V / 230V AC (Dual Voltage Support) | | **Frequency** | 50 / 60 Hz | | **Rated Current** | ~0.09A / 0.08A | | **Rated Input Power** | ~16W / 14W | | **Rated Speed** | 2,700 ~ 3,100 RPM | | **Max Airflow** | ~50 - 60 CFM (Cubic Feet per Minute) | | **Noise Level** | ~38 - 42 dB(A) | | **Frame Material** | Aluminum Die-cast | | **Bearing Type** | Dual Ball Bearing | --- ### 2. Key Electronic Components & Design The internal architecture of the W2AC-A4CA-R consists of several critical sub-assemblies: #### A. The Induction Motor Unlike DC fans that use electronic commutation (ESC), this AC fan uses a **Shaded Pole** or **Capacitor-run induction motor**. * **Stator:** Wound with copper coils that create a rotating magnetic field when connected to AC power. * **Rotor:** A permanent magnet or squirrel-cage rotor that reacts to the stator's field to generate torque. #### B. Protection Features * **Impedance Protection:** The motor windings are designed so that if the fan is physically locked (e.g., by debris), the internal resistance (impedance) prevents the current from rising to a level that would cause a fire or permanent coil damage. * **Thermal Insulation:** Rated at Class B or F to withstand high internal temperatures during continuous operation. #### C. Bearing System * **Dual Ball Bearings:** The "R" in the suffix often denotes a high-reliability revision. Dual ball bearings allow for both horizontal and vertical mounting and provide a long MTBF (Mean Time Between Failures), typically exceeding 40,000 to 60,000 hours at 40°C. --- ### 3. Connection and Installation The "A4CA" portion of the part number usually specifies the termination type: * **Terminal Type:** Usually features two solder terminals or spade connectors for AC lead wires. * **Grounding:** The aluminum frame typically includes a grounding point to prevent ESD (Electrostatic Discharge) buildup or electrical leakage to the chassis. --- ### 4. Typical Applications * **Server Racks:** Dissipating heat from high-density computing hardware. * **Power Supplies:** Cooling large industrial transformers or UPS systems. * **CNC Machinery:** Keeping electronic control boards within operating temperature limits. ---