The model **W2AC-A3DA-R/Q** refers to a high-performance **Industrial AC Fan** manufactured by **ebm-papst**. It is part of the W2AC series, specifically designed for cooling electronic cabinets and machinery. --- ### 1. Technical Specifications Below is a breakdown of the key electronic and physical characteristics: | Feature | Specification | | :--- | :--- | | **Input Voltage** | 115 VAC (Standard AC Line) | | **Frequency** | 50 / 60 Hz | | **Current Consumption** | ~0.11 A (at 60Hz) | | **Power Input** | ~9.0 Watts | | **Speed (RPM)** | 2700 - 3200 RPM | | **Airflow Capacity** | ~26.5 CFM (Cubic Feet per Minute) | | **Bearing Type** | Ball Bearing (Long life) | | **Termination** | 2-Lead Wires (Standard) | --- ### 2. Core Electronic Components The internal electronics of this unit are built for longevity and continuous operation: * **Shaded-Pole Motor:** This fan utilizes a single-phase AC shaded-pole motor. These are electrically simple and highly reliable because they do not require start capacitors or internal switches. * **Impedance Protection:** The unit is "Impedance Protected." This means the motor is designed so that if the rotor is locked (e.g., a physical obstruction), the impedance of the windings prevents the current from rising to a level that would cause a fire or melt the insulation. * **Insulation Class:** Typically Class B or F, allowing the internal wiring to withstand high thermal stress during 24/7 operation. * **Housing/Frame:** Die-cast aluminum housing which acts as a heat sink for the motor windings, improving electronic efficiency by dissipating heat. --- ### 3. Part Number Suffix Breakdown While "W2AC-A3DA" defines the core motor and frame, the suffixes denote specific variations: 1. **-R:** Usually indicates the rotation direction or a specific rib design on the housing for mounting. 2. **-Q:** Often refers to a specific electrical termination (like a particular plug) or a specific quality/packaging standard for industrial clients. --- ### 4. Application Areas Because of its AC-direct input and robust build, it is commonly used in: * **Power Supplies:** Cooling large industrial transformers or rectifiers. * **Server Racks:** Maintaining airflow in 19-inch enclosures. * **Medical Equipment:** High-reliability cooling for diagnostic machines.