The part number **W2AC-A31A-R2/Q** refers to a high-performance **AC cooling fan** manufactured by **Wibond** (or often distributed under the **Fulltech** brand architecture). These fans are typically used in industrial control cabinets, server racks, and power supplies. Below is the detailed breakdown of its electronic and mechanical specifications. --- ## 1. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 220V - 240V AC | | **Frequency** | 50 / 60 Hz | | **Input Power** | ~20W to 24W (varies by load) | | **Current Consumption** | ~0.12A to 0.15A | | **Speed (RPM)** | 2700 - 3000 RPM | | **Airflow** | ~90 - 105 CFM | | **Bearing Type** | Dual Ball Bearing | | **Noise Level** | ~45 - 50 dB(A) | | **Dimensions** | 120mm x 120mm x 38mm | --- ## 2. Key Electronic Components & Features ### A. The Motor Structure * **Shaded Pole or Capacitor Run:** This is an AC induction motor. Unlike DC fans that use a PCB with a Hall Effect sensor, this motor relies on the AC frequency (50/60Hz) to determine rotation speed. * **Insulation Class:** Usually **Class B or F**, meaning the internal wiring insulation can withstand temperatures up to 130°C–155°C. ### B. Bearing System * **Dual Ball Bearings:** The "R2" designation often implies a specific bearing configuration. Ball bearings are electronically preferred in industrial settings because they allow for both horizontal and vertical mounting and have a longer MTBF (Mean Time Between Failures) than sleeve bearings. ### C. Protection Circuitry * **Impedance Protected:** The motor windings are designed so that if the fan blades are obstructed (locked rotor), the internal resistance prevents the coils from overheating and catching fire. * **Dielectric Strength:** The unit is tested to ensure no leakage current between the electrical leads and the metal frame (typically tested at 1500V AC for 1 minute). --- ## 3. Connection Interface The "Q" in the suffix usually denotes the **Electrical Connection Type**: * **Terminal Type:** Instead of loose wires, the unit features two male spade terminals (fast-on connectors). This allows for quick replacement in industrial racks without soldering. --- ## 4. Part Number Decoder (Typical) | Code | Meaning | | :--- | :--- | | **W2AC** | Series (AC Axial Fan) | | **A31A** | Frame Size (120x120x38mm) & Voltage (230V) | | **R2** | Bearing / Speed Grade (High Speed / Dual Ball) | | **Q** | Quick-connect Terminals | ---