The **W2AC-AZ4B-R2** is a specific industrial-grade AC axial fan manufactured by **Sanyo Denki**, part of their "San Ace" series. These components are designed for high-reliability cooling in server racks, industrial cabinets, and power supplies. --- ### 1. Technical Specifications Below are the core electronic and mechanical parameters for this component: | Feature | Specification | | :--- | :--- | | **Rated Voltage** | 100V AC (Standard range 100V-115V) | | **Frequency** | 50 / 60 Hz | | **Current** | Approx. 0.12A / 0.10A | | **Input Power** | 10W / 9W | | **Rated Speed** | 2700 / 3100 RPM | | **Max Airflow** | ~49 / 60 CFM | | **Noise Level** | ~36 / 40 dB(A) | | **Dimensions** | 120mm x 120mm x 38mm | | **Bearing Type** | Dual Ball Bearing | --- ### 2. Breakdown of the Model Number The alphanumeric code follows Sanyo Denki’s internal naming convention: * **W2AC**: Refers to the series designation (AC Input, 120mm frame). * **AZ**: Often indicates the specific frame type or motor winding characteristics. * **4B**: Designates the voltage class (100V-115V) and speed grade (Middle-High). * **R2**: Revision code indicating specific lead wire lengths, connector types, or compliance (e.g., RoHS). --- ### 3. Key Electronic Components & Features #### A. Shaded Pole Motor The fan utilizes a **Shaded Pole Induction Motor**. Unlike DC fans that use complex PCB controllers, this motor relies on the AC frequency to create a rotating magnetic field. It is electronically simpler, making it extremely durable in harsh environments. #### B. Impedance Protection The "AZ" series typically includes **Impedance Protection**. This is a safety feature where the motor windings are designed to limit current flow if the fan blade is obstructed (locked rotor). This prevents the coils from overheating and catching fire without needing a physical fuse. #### C. Dual Ball Bearing System The electronic rotor is supported by two precision ball bearings. This is superior to "sleeve" bearings because: * It handles heat better (rated for up to 60°C or 70°C). * It allows the fan to be mounted in any orientation (horizontal, vertical, or angled). #### D. Material and Housing * **Frame:** Usually die-cast aluminum (provides heat dissipation and EMI shielding). * **Impeller:** Flame-retardant plastic (UL 94V-0 rated). --- ### 4. Wiring and Connection This model typically features **two lead wires** (L and N) or **terminal pins**. Since it is an AC component, polarity is not strictly required for operation, but grounding the metal frame (if a ground lug is present) is essential for industrial safety. ---