The **W2AC-A3DD-R2** is a specific part number typically associated with high-performance cooling solutions, most commonly found in **Delta Electronics** or industrial fan assembly series (specifically AC axial fans). Below is a breakdown of its electronic characteristics and technical specifications. --- ### 1. Technical Specifications Overview This part is designed for industrial-grade thermal management. The alphanumeric code indicates its physical and electrical properties. | Feature | Specification | | :--- | :--- | | **Component Type** | AC Axial Fan / Cooling Unit | | **Input Voltage** | 220V - 240V AC | | **Frequency** | 50/60 Hz | | **Bearing Type** | Dual Ball Bearing (Long life) | | **Housing Material** | Die-cast Aluminum | | **Impeller Material** | Thermoplastic (UL 94V-0) or Metal | | **Termination** | Lead Wires or Terminals (Model dependent) | --- ### 2. Key Electronic Components The internal construction of the W2AC-A3DD-R2 involves several critical electronic stages: #### A. Shaded Pole or Capacitor-Run Motor * **Stator:** Comprised of copper windings and laminated steel cores. * **Function:** It converts the 220V AC input into a rotating magnetic field to drive the permanent magnet or induction rotor. #### B. Integrated Protection Circuits * **Impedance Protection:** The motor windings are designed so that if the fan is stalled (locked rotor), the impedance of the coils prevents the current from rising to a level that would cause a fire or permanent damage. * **Thermal Cut-off:** Many "R2" series fans include an internal thermal fuse that breaks the circuit if the temperature exceeds safety limits (usually around 110°C - 125°C). #### C. Ball Bearing System * The **"DD"** or **"R2"** suffixes often refer to high-end dual ball bearing systems. Unlike sleeve bearings, these use stainless steel balls to reduce friction, allowing the fan to operate at high temperatures and in any orientation (horizontal or vertical) for over 50,000 hours. --- ### 3. Usage & Environmental Protection The electronic parts are treated to withstand harsh environments: * **Insulation Class:** Usually rated Class B or Class F (suitable for high-heat environments). * **Dielectric Strength:** Capable of withstanding 1500V AC for 1 minute between the frame and the terminals. * **Applications:** Server racks, industrial control panels, CNC machinery, and power supply cabinets. --- ### 4. Part Number Breakdown (Typical) While manufacturers vary slightly, the code generally follows this logic: | Segment | Meaning | | :--- | :--- | | **W2** | Series/Frame Style (e.g., 120mm square) | | **AC** | Power Input Type (Alternating Current) | | **A3** | Voltage Code (220-240V Range) | | **DD** | Bearing/Speed High-performance designation | | **R2** | Revision code / Lead wire configuration | ---