The part number **W2AC-AAAB-R2SLASHQ** refers to a specific configuration of a high-performance **industrial AC fan** (typically a backward curved centrifugal fan or axial fan) manufactured by **ebm-papst**. --- ## 1. Technical Specifications Based on the standard nomenclature for the W2AC series, here are the core electronic and mechanical characteristics: | Property | Specification | | :--- | :--- | | **Type** | AC Axial Fan / External Rotor Motor | | **Input Voltage** | Typically 115V or 230V AC (Standard Mains) | | **Frequency** | 50 / 60 Hz | | **Bearing Type** | Ball Bearings (Maintenance-free) | | **Housing Material** | Die-cast aluminum / Plastic (Application dependent) | | **Protection Class** | IP22 to IP44 (Varies by specific build) | --- ## 2. Component Breakdown The part number is a composite code that defines the electronic behavior and physical build: ### Motor Technology * **External Rotor Motor:** Unlike standard motors, the rotor rotates around the stationary stator. This allows for a very compact design and efficient cooling of the motor coils themselves. * **Capacitor Run:** These motors often utilize a permanent split capacitor (PSC) for starting and running efficiency. ### Connectivity & Control * **W2AC Series:** Known for high airflow-to-size ratios. * **R2/Q Suffixes:** These often denote specific **terminal configurations** (e.g., lead wires vs. plug-in connectors) or **impedance protection** (thermal protection against locking the rotor). * **"SLASHQ":** This is often a customer-specific or regional marking indicating compliance with specific safety standards or a "Quick-connect" terminal style. --- ## 3. Key Electronic Features 1. **Impedance Protection:** The motor is designed so that if the fan blade is obstructed, the internal resistance prevents the coils from overheating and catching fire. 2. **Thermal Overload:** Many versions include an internal thermal switch that cuts power if the operating temperature exceeds safety limits. 3. **EMC Compliance:** Designed to minimize electromagnetic interference on the AC line, making them suitable for medical and server rack environments. --- ## 4. Common Applications * **Server Racks:** Cooling high-density electronic components. * **Power Supplies:** Heat dissipation for large industrial UPS systems. * **Cabinet Ventilation:** Removing hot air from electrical control panels.