The **W2SP-12B-R2/N** is a specific part number associated with high-performance cooling fans, typically manufactured by companies like **Nidec** (often found in networking equipment and servers). Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. General Specifications This part is a high-static pressure axial fan designed for industrial applications where thermal management is critical. | Parameter | Specification | | :--- | :--- | | **Type** | DC Axial Fan | | **Voltage (Nominal)** | 12V DC | | **Connector** | Typically 4-pin (PWM control + Tachometer) | | **Bearing Type** | Dual Ball Bearing (for longevity) | | **Material** | Plastic (PBT) Frame and Impeller | ### 2. Electronic Interface The "12B" in the sequence often denotes the **12V DC** input requirement. As a modern electronic component, it features integrated circuitry for control and monitoring: * **PWM Control (Pulse Width Modulation):** Allows the system (server/PC) to dynamically adjust the fan speed based on temperature, reducing noise and power consumption. * **Tachometer Output (Frequency Generator):** Sends a signal back to the motherboard/controller to monitor the actual RPM. If the fan stalls, the system can trigger an alarm. * **Polarity Protection:** Built-in diodes to prevent damage if the power leads are reversed. ### 3. Application Use-Case The "R2/N" suffix usually indicates a specific revision or a custom OEM wiring configuration (often for brands like HP, Dell, or specialized networking chassis). * **High Static Pressure:** Designed to push air through dense heat sinks or crowded server blades. * **High Reliability:** The dual ball bearing system is rated for continuous 24/7 operation, typically exceeding 70,000 hours at 40°C. ### 4. Typical Wiring Pinout (Standard 4-Wire) If the unit uses a standard 4-pin header, the electronic leads are generally assigned as follows: | Pin Number | Color (Standard) | Function | | :--- | :--- | :--- | | 1 | Black | Ground (GND) | | 2 | Red/Yellow | Power (+12V) | | 3 | Green/Blue | Tachometer (Speed Signal) | | 4 | Blue/White | PWM Control Input | --- ### Summary of Features 1. **Efficiency:** High-efficiency motor driver IC reduces electromagnetic interference (EMI). 2. **Durability:** The "R2" revision often includes improved moisture resistance or updated motor winding insulation. 3. **Performance:** Optimized blade geometry for maximum airflow-to-noise ratio.