The **W2PE-5AZ-R2/UL** is a specific model of an **AC axial fan** manufactured by **Sanyo Denki**, part of their "San Ace" series. This particular fan is designed for high-performance cooling in industrial equipment and server racks. --- ### 1. Technical Specifications | Feature | Specification | | :--- | :--- | | **Type** | AC Axial Fan | | **Input Voltage** | 230V AC (50/60Hz) | | **Dimensions** | Approx. 172mm x 150mm x 51mm (Side-cut shape) | | **Material** | Aluminum frame (Die-cast), Plastic Impeller (UL94V-0) | | **Bearing Type** | Dual Ball Bearing | | **Safety Standards** | UL/CSA, TUV, CE | | **Airflow** | High volume (approx. 180–210 CFM depending on frequency) | --- ### 2. Key Electronic & Mechanical Components The "Electronic" nature of this fan is defined by its internal motor control and protection circuits: #### A. Shaded Pole or Capacitor-run Motor Unlike DC fans that use complex PCB controllers, this AC fan utilizes a robust induction motor. It is designed to handle fluctuations in AC line voltage while maintaining a consistent RPM. #### B. Integrated Thermal Protection The "UL" designation often implies specific safety protections. These fans typically include **Impedance Protection** or **Thermal Protection**. If the fan blades are locked (stalled), the internal circuitry prevents the motor coils from overheating and catching fire by limiting the current. #### C. Ball Bearing System The unit uses high-precision dual ball bearings. From an engineering standpoint, this reduces friction and electronic noise (EMI) while significantly extending the Life Expectancy (typically 50,000 to 100,000 hours). #### D. Connection Interface The "R2" suffix often refers to the specific wiring or terminal configuration: * **Terminal Type:** Faston #110 terminals or lead wires. * **Grounding:** The aluminum frame includes a grounding point to prevent ESD (Electrostatic Discharge) buildup. --- ### 3. Application Areas Due to its high voltage and airflow capacity, it is commonly found in: 1. **Server Enclosures:** Providing primary exhaust for heat-intensive racks. 2. **Industrial Control Panels:** Cooling PLCs and power supplies. 3. **Medical Equipment:** Large-scale imaging machines requiring steady airflow. ---