The **W2SP-1B4-R2** is a specific part number typically associated with high-performance **Cooling Fans**, specifically those manufactured by **Sanyo Denki** under their "San Ace" product line. Below is a detailed breakdown of the electronic specifications and characteristics for this component. --- ## 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Manufacturer** | Sanyo Denki | | **Series** | San Ace (Waterproof/Splash Proof) | | **Rated Voltage** | 24V DC | | **Operating Voltage Range** | 14V to 27.6V DC | | **Rated Current** | 0.08A - 0.12A (approx.) | | **Speed** | High Speed (approx. 4000+ RPM) | | **Airflow** | ~25 - 30 CFM | | **Static Pressure** | ~40 - 50 Pa | | **Noise Level** | ~30 - 35 dB(A) | | **Ingress Protection** | IP54 / IP55 (Splash Proof) | --- ## 2. Key Electronic Components & Features ### A. Motor Architecture * **Brushless DC (BLDC) Motor:** The unit utilizes a 3-phase or single-phase BLDC motor, which eliminates mechanical wear from brushes, ensuring a longer lifespan (often rated for 40,000 to 100,000 hours). * **Bearing System:** Usually equipped with **Dual Ball Bearings**. These are electronically balanced to reduce EMI (Electromagnetic Interference) and vibration. ### B. Protection Circuits The internal PCB (Printed Circuit Board) includes several protective layers: * **Locked Rotor Protection:** Automatically cuts or reduces power if the fan blades are physically obstructed to prevent the coils from burning out. * **Reverse Polarity Protection:** Prevents damage if the positive and negative leads are accidentally swapped during installation. ### C. Environmental Sealing (The "SP" Designation) The "SP" in the part number stands for **Splash Proof**. * **Encapsulation:** The internal electronics (stator and PCB) are coated in a specialized resin (potting). * **Corrosion Resistance:** The motor components are treated to withstand high humidity and occasional water spray, making it ideal for outdoor telecommunications or industrial cabinets. --- ## 3. Wiring and Interface The unit typically features a 2-wire or 3-wire lead configuration: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Red** | VCC (+) | Positive power input (24V). | | **Black** | GND (-) | Negative power return. | | **Yellow/White** | Sensor (Optional) | Usually a **Tachometer (FG)** signal to monitor RPM. | --- ## 4. Typical Applications * **Industrial Inverters:** Used to cool power electronics that generate heat. * **Outdoor Server Racks:** Protection against condensation and light rain. * **Medical Equipment:** Reliable cooling for high-uptime diagnostic machines.