The **W2DY-243A-R2/N** is a specialized electronic cooling component, specifically a **Cross-Flow Fan** (also known as a Tangential Fan) manufactured by Sanyo Denki. These fans are designed to provide a wide, uniform laminar airflow, making them ideal for cooling electronics in slim or rectangular enclosures. --- ### 1. Technical Specifications The following table summarizes the primary electrical and physical characteristics of this part: | Parameter | Specification | | :--- | :--- | | **Type** | Cross-Flow Fan (Tangential) | | **Rated Voltage** | 24V DC | | **Operating Voltage Range** | 20.4V to 27.6V DC | | **Rated Current** | Approximately 0.45A - 0.55A (varies by load) | | **Rated Input** | ~11W - 13W | | **Max Airflow** | ~1.6 - 1.8 m³/min | | **Noise Level** | ~45 - 50 dB(A) | | **Frame Material** | Aluminum / Steel | | **Impeller Material** | Aluminum / Resin | --- ### 2. Key Features and Design The W2DY series is known for high-reliability engineering. Here are the core electronic and mechanical aspects: * **Motor Type:** It utilizes a **Brushless DC (BLDC)** motor. This reduces electromagnetic interference (EMI) and significantly extends the lifespan compared to brushed motors. * **Sensor Configuration (/N):** The `/N` suffix typically indicates a specific sensor output. In Sanyo Denki nomenclature, this often refers to a **Pulse Sensor (Tachometer)**. This allows the system controller to monitor the fan's RPM and detect if the fan has stalled or slowed down. * **Bearing System:** Equipped with **Dual Ball Bearings**. These are rated for long-term continuous operation (L10 life expectancy often exceeding 40,000 hours at 40°C). * **Airflow Pattern:** Unlike axial fans that create a "tunnel" of air, cross-flow fans create a wide, flat "curtain" of air. This is vital for cooling long components like PCB rows or heat exchanger fins. --- ### 3. Connection and Wiring The fan typically uses a 3-wire lead system: 1. **Red:** Positive (+24VDC) 2. **Black:** Negative (GND) 3. **Yellow/White:** Sensor Lead (Pulse/Tachometer output) --- ### 4. Common Applications * **Telecommunications:** Cooling server racks and blade servers where space is narrow. * **Power Supplies:** Large industrial PSU units requiring uniform heat dissipation. * **Display Technology:** Cooling large LED/LCD displays or projectors. * **HVAC/Air Curtains:** Small scale air circulation in clean-room equipment.