The **W2TG0-2DB-R2/UL** is a high-performance, industrial-grade cooling component, specifically an **AC axial fan** manufactured by **ebm-papst**. It is widely used in telecommunications, server racks, and industrial control cabinets due to its reliability and compliance with international safety standards. --- ### Technical Specifications The electronic and mechanical characteristics of this component are summarized in the table below: | Feature | Specification | | :--- | :--- | | **Manufacturer** | ebm-papst | | **Motor Type** | AC Sinusoidal (Shaded-pole motor) | | **Nominal Voltage** | 115 VAC | | **Frequency** | 50 / 60 Hz | | **Power Consumption** | ~11.0 W | | **Current Consumption** | 0.13 A | | **Speed (RPM)** | 2700 - 3200 RPM | | **Air Flow** | ~41.2 CFM (70.0 m³/h) | | **Bearing Type** | Ball Bearing | | **Termination** | 2 Lead Wires | --- ### Key Electronic Components & Features #### 1. Shaded-Pole Motor Design The "electronic" heart of this fan is a **shaded-pole AC motor**. Unlike DC fans that require complex integrated circuits (ICs) for commutation, this motor uses a copper ring (shading coil) around a portion of each pole to create a lagging magnetic field. This provides the starting torque necessary to rotate the impeller. #### 2. Thermal Protection The motor is **impedance protected**. This means that if the fan blade is physically obstructed (locked rotor condition), the electrical impedance of the motor windings is high enough to prevent the current from rising to a level that would cause a fire or melt the insulation. It does not require a separate thermal fuse. #### 3. UL Recognition (/UL Suffix) The `/UL` suffix indicates that the electrical insulation system and components meet the **Underwriters Laboratories** safety standards. This ensures the plastics are flame retardant and the electrical leakage current is within safe limits for industrial deployment. #### 4. Grounding and Insulation - **Insulation Class:** Typically Class B or E. - **Housing:** The frame is made of die-cast aluminum, which acts as a heat sink for the motor windings and provides a sturdy path for electrical grounding via the mounting points. --- ### Electrical Wiring Diagram The unit typically features two leads. Because it is an AC device, polarity is not strictly sensitive for operation, though grounding the chassis is mandatory for safety. ```text L (Line/Hot) -------[ Black Wire ]------- ( Motor Coil ) | N (Neutral) -------[ Black Wire ]------- ( Motor Coil ) PE (Earth) -------[ Chassis Screw ]----- ( Aluminum Frame ) ``` ---