The **W2TG0-243-R2/UL** is a high-performance AC axial fan manufactured by **ebm-papst**. It is part of the W2T series, commonly used for thermal management in server racks, industrial enclosures, and power supplies. --- ## Technical Specifications The following table outlines the primary electronic and mechanical characteristics of this specific model: | Parameter | Specification | | :--- | :--- | | **Nominal Voltage** | 230 VAC | | **Frequency** | 50 / 60 Hz | | **Power Consumption** | 24 W (at 50Hz) / 26 W (at 60Hz) | | **Current Draw** | 0.11 A to 0.13 A | | **Speed (RPM)** | 2700 - 3000 RPM | | **Airflow** | ~100 - 115 m³/h | | **Bearing Type** | Ball Bearings | | **Material** | Die-cast aluminum housing / Plastic impeller | | **Connection** | 2 Flat terminals (Faston) | --- ## Electronic Components & Design ### 1. The Motor Structure This fan utilizes a **shaded-pole motor** (external rotor motor). Unlike traditional motors where the rotor is inside the stator, ebm-papst designs integrate the impeller directly onto the external rotor. This allows for a more compact design and improved cooling of the motor itself. ### 2. Insulation and Safety * **UL Certification:** The "/UL" suffix indicates that the components and materials comply with Underwriters Laboratories safety standards for the North American market. * **Insulation Class:** Typically Class B or F, meaning the internal windings are treated with resins that can withstand high temperatures without short-circuiting. * **Impedance Protection:** The motor is protected against locking. If the impeller is jammed, the internal impedance of the windings prevents the motor from overheating or catching fire. ### 3. Capacitor-Less Start Since it is a shaded-pole AC motor, it does not require a starting capacitor. It uses a copper "shading ring" on the stator poles to create a delayed magnetic field, providing the necessary starting torque. ### 4. EMI/RFI Considerations Because it is a brushless AC motor without mechanical commutators, it generates significantly less electromagnetic interference (EMI) compared to brushed DC motors, making it ideal for sensitive electronic environments. --- ## Wiring Diagram Reference For the **R2** variant (terminals), the connection is straightforward: ```text L (Line) ----[ Terminal 1 ] N (Neutral) ----[ Terminal 2 ] PE (Ground) ----[ Housing Screw ] ``` *Note: Always ensure the metal housing is grounded via the provided screw hole to prevent static buildup or shock hazards.*