The part number **W2TG0-2A4-R2/UL** refers to a high-performance **AC Axial Fan** manufactured by **Willing (or similar industrial cooling manufacturers)**. This specific model is designed for thermal management in industrial equipment, server racks, and power supplies. --- ### 1. Technical Specifications The table below breaks down the primary electrical and mechanical characteristics of this component: | Feature | Specification | | :--- | :--- | | **Input Voltage** | 220V - 240V AC | | **Frequency** | 50 / 60 Hz | | **Power Consumption** | Approximately 20W - 24W | | **Bearing Type** | Dual Ball Bearing (Long life) | | **Frame Material** | Die-cast Aluminum (High Durability) | | **Blade Material** | Reinforced Thermoplastic (PBT) | | **Termination** | Lead Wires or Terminals | | **Safety Certification** | UL (Underwriters Laboratories) Recognized | --- ### 2. Electronic Component Breakdown The assembly of the W2TG0-2A4-R2/UL consists of several critical electronic and electromechanical parts: #### A. The Induction Motor The heart of the fan is a **shaded-pole** or **capacitor-run AC induction motor**. It is designed for continuous operation (100% duty cycle) and is impedance protected to prevent burnout in case the rotor is locked/obstructed. #### B. Ball Bearing System The "2A4" designation typically implies a dual ball-bearing system. Unlike sleeve bearings, ball bearings: * Allow for mounting in any orientation (vertical or horizontal). * Have a significantly higher MTBF (Mean Time Between Failures), usually exceeding 50,000 hours. #### C. Integrated Protection * **Thermal Protection:** Includes an internal thermal fuse or impedance protection to shut down power if temperatures exceed safe operating limits. * **UL Certification:** The `/UL` suffix indicates the part complies with UL-507 standards for electric fans, ensuring specific insulation classes and fire safety. --- ### 3. Wiring Configuration Standard wiring for this AC fan usually follows this logic: ```json { "wiring": { "black_wire": "Line (L)", "red_or_blue_wire": "Neutral (N)", "green_yellow": "Ground (GND) - if applicable" } } ``` --- ### 4. Applications * **Control Cabinets:** Removing heat from PLCs and Motor Drives. * **Telecom Racks:** Cooling sensitive networking equipment. * **HVAC Systems:** Small-scale ventilation and air circulation.