The **W2AC-A4BA-R2** is a specialized electronic component, typically categorized as a high-performance **AC Axial Fan** manufactured by **Sanyo Denki** (San Ace series). This specific model is designed for industrial cooling applications where high airflow and reliability are critical. --- ## 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Manufacturer** | Sanyo Denki | | **Series** | San Ace 120 (AC Type) | | **Frame Size** | 120mm x 120mm x 38mm | | **Input Voltage** | 200V - 230V AC (50/60Hz) | | **Power Consumption** | ~14W to 18W (depending on frequency) | | **Speed (RPM)** | 2700 - 3100 RPM | | **Airflow Capacity** | ~90 - 105 CFM | | **Bearing Type** | Dual Ball Bearing | | **Housing Material** | Aluminum Die-cast | | **Termination** | Lead Wires (R2 indicates revision/wiring type) | --- ## 2. Core Electronic Components The "Electronic Parts" within this assembly are focused on converting the incoming AC voltage into mechanical rotation efficiently: ### A. The Induction Motor Unlike DC fans that use a PCB with a controller, this AC fan uses a **Shaded Pole** or **Permanent Split Capacitor (PSC)** induction motor. * **Stator Windings:** High-quality copper coils treated with insulation varnish to prevent short circuits under high heat. * **Rotor:** A permanent magnet or squirrel-cage rotor that reacts to the electromagnetic field generated by the AC cycles. ### B. Thermal Protection * **Impedance Protection:** The windings are electronically designed to have high impedance. If the fan blades are locked (preventing rotation), the internal circuitry limits the current so the motor does not burn out or catch fire. ### C. Bearing System * **Dual Ball Bearings:** These are precision-engineered mechanical/electronic components that ensure low friction. They are rated for long-term continuous operation (typically 40,000 to 60,000 hours). --- ## 3. Part Number Breakdown (W2AC-A4BA-R2) | Code Segment | Meaning | | :--- | :--- | | **W2AC** | AC Powered Axial Fan Series | | **A4** | Voltage Rating (typically indicates 200-230V range) | | **BA** | Size and Performance configuration (120x38mm, standard speed) | | **R2** | Revision code, often denoting wire lead length or specific connector types | --- ## 4. Operational Environment This component is built for harsh environments. The electronics are housed in an **Aluminum frame**, which acts as a heat sink for the motor, and the plastic impeller is usually **UL 94V-0 rated** (flame retardant).