The part number **W2AC-AA4Y-R** identifies a specific configuration of a high-performance **industrial AC fan**, typically manufactured by brands like **Sanyo Denki** (San Ace series) or similar thermal management specialists. These fans are designed for cooling electronic enclosures, server racks, and industrial machinery. --- ### 1. Technical Specifications Below are the typical electronic and mechanical characteristics for this series: | Feature | Specification | | :--- | :--- | | **Input Voltage** | 230V AC (Operating range 200V - 240V) | | **Frequency** | 50 / 60 Hz | | **Frame Size** | 120mm x 120mm x 38mm (Standard) | | **Bearing Type** | Dual Ball Bearing (High Reliability) | | **Power Consumption** | Approx. 14W - 18W | | **Airflow** | High CFM (approx. 90-105 CFM) | | **Material** | Aluminum Die-cast Frame / Plastic Impeller (UL94V-0) | --- ### 2. Breakdown of the Part Number Components While naming conventions vary slightly by manufacturer, the code generally breaks down as follows: * **W2AC**: Indicates the series (often a 120mm AC-powered axial fan). * **AA**: Refers to the physical frame style and mounting hole configuration. * **4Y**: Specifies the voltage rating (typically 230V class) and speed grade (High Speed). * **R**: Usually denotes **RoHS Compliance**, ensuring the part is free from hazardous substances like lead or mercury. --- ### 3. Key Electronic Features * **Shaded Pole Motor:** The motor utilizes a shaded-pole or capacitor-run induction design, which is highly reliable for continuous 24/7 operation as it has no brushes to wear out. * **Impedance Protection:** The windings are designed to withstand a locked-rotor condition without catching fire or melting, providing an inherent safety layer. * **Termination:** Typically features two lead wires or fast-on terminals for AC mains connection. * **Long Life Expectancy:** Due to the dual ball-bearing system, these fans often have an L10 life expectancy of **40,000 to 70,000 hours** at 40°C. --- ### 4. Comparison: AC vs. DC Fans If you are considering this part for a project, keep these electronic differences in mind: | Feature | AC Fan (W2AC-AA4Y-R) | DC Fan Equivalent | | :--- | :--- | :--- | | **Power Source** | Direct Wall/Mains Plug | Requires Power Supply (PSU) | | **Speed Control** | Constant (Fixed by Frequency) | PWM or Voltage Variable | | **EMI/EMC** | Low Electronic Noise | Can generate switching noise | ---