The **W2AC-A44B-R2/Q** is a specific model identifier typically associated with **Delta Electronics** cooling solutions, specifically their high-performance AC axial fans. These components are designed for industrial thermal management, cabinet cooling, and telecommunications equipment. ### 1. Key Technical Specifications Based on the standard nomenclature for this series, here are the primary electronic and mechanical characteristics: | Feature | Specification | | :--- | :--- | | **Type** | AC Axial Fan | | **Operating Voltage** | 220V - 240V AC | | **Frequency** | 50/60 Hz | | **Input Power** | Approx. 14W - 18W (varies by load) | | **Rated Speed** | ~2600 - 3000 RPM | | **Bearing Type** | Dual Ball Bearing (High durability) | | **Termination** | Terminals or Lead Wires (Model dependent) | | **Frame Material** | Die-cast Aluminum | --- ### 2. Electronic Component Breakdown The internal electronics of this unit are designed for longevity and protection against harsh industrial environments: * **Induction Motor:** It utilizes a shaded-pole or capacitor-run induction motor. These are brushless by design, reducing electromagnetic interference (EMI) and physical wear. * **Impedance Protection:** The "R" designation often indicates that the motor is **Impedance Protected**. This means if the fan blades are blocked (locked rotor), the internal resistance of the coils prevents the temperature from rising to a point where the motor would catch fire. * **Insulation Class:** Usually rated as **Class B or F**, allowing the internal wiring to withstand temperatures between 130°C and 155°C. * **Dual Ball Bearing System:** The electronic motor shaft is supported by two precision ball bearings, which allow for operation in any orientation (horizontal, vertical, or angled) and extend the MTBF (Mean Time Between Failures) to approximately 50,000+ hours. --- ### 3. Suffix Meaning (/Q) In Delta’s catalog, the **/Q** suffix usually denotes a specific quality standard or a slight modification in airflow/noise ratio: 1. **Quiet Operation:** Often indicates a blade geometry or motor tuning designed to reduce decibel levels without significantly sacrificing static pressure. 2. **Environmental Protection:** May indicate an IP (Ingress Protection) rating, such as IP54 or IP55, providing some resistance to dust and moisture. --- ### 4. Typical Applications * **Server Racks:** Removing heat from high-density computing clusters. * **Power Supplies:** Cooling large industrial UPS systems or rectifiers. * **Control Cabinets:** Preventing overheating in CNC machines or PLC enclosures.