The **W2AC-A22A-R2** is a specific model of an **AC Axial Fan**, typically manufactured by companies like **Fulltech Electric**. These fans are engineered for high-performance cooling in industrial enclosures, server racks, and power supplies. Below is a breakdown of its electronic and mechanical specifications. ### 1. Technical Specifications The "W2AC" series generally follows a standardized naming convention for size, voltage, and bearing type. | Feature | Specification | | :--- | :--- | | **Input Voltage** | 220V - 240V AC | | **Frequency** | 50 / 60 Hz | | **Frame Size** | 120 x 120 x 38 mm (Standard Square) | | **Bearing Type** | Dual Ball Bearing (Indicated by "2" or "B") | | **Power Consumption** | ~18W to 22W (Typical) | | **Speed** | 2500 - 3000 RPM | | **Airflow** | ~90 to 110 CFM | | **Termination** | Lead Wires or Terminals (R2 usually denotes Terminal type) | --- ### 2. Key Electronic Components #### A. Shaded Pole Motor The heart of the W2AC-A22A-R2 is an **AC Shaded Pole Induction Motor**. * **Self-Starting:** It uses a copper ring (shading coil) around part of each pole to create a delayed magnetic field, allowing the motor to start without a capacitor. * **Durability:** These motors are extremely robust as they have no brushes to wear out. #### B. Dual Ball Bearing System The "2" in the part number suffix often signifies a dual ball bearing system. * **Life Expectancy:** Ball bearings allow the fan to operate continuously for 50,000+ hours. * **Orientation:** Unlike sleeve bearings, ball bearing fans can be mounted in any orientation (horizontal, vertical, or angled) without affecting lifespan. #### C. Impedance Protection This unit is electronically protected against **locked rotor** conditions. * If the fan blades are obstructed, the internal impedance of the motor windings limits the current flow. * This prevents the motor from overheating or catching fire even if it stays stalled while powered. --- ### 3. Construction Materials * **Frame:** Die-cast Aluminum (painted black for corrosion resistance and heat dissipation). * **Impeller (Blades):** Thermoplastic PBT (UL 94V-0 rated), which is flame retardant. * **Insulation:** Class B or Class F insulation, allowing the motor to handle internal temperatures up to 120°C-155°C. --- ### 4. Application Context Because this is an AC-powered fan (220V), it is directly wired to the mains power or a transformer within industrial equipment. It is commonly found in: 1. **Control Cabinets:** Removing heat generated by PLCs and Inverters. 2. **Medical Equipment:** High-reliability cooling for diagnostic tools. 3. **Vending Machines:** Air circulation for internal components. ---