The **W2PV-C1SA2-R2/Q** is a specialized high-performance industrial cooling fan, typically manufactured by **Sanyo Denki** (San Ace series). It is designed for applications requiring high static pressure and reliability, such as server racks, telecommunications equipment, and power supplies. --- ### 1. Key Technical Specifications Below are the primary electronic and physical parameters for this component: | Parameter | Specification | | :--- | :--- | | **Rated Voltage** | 12V DC | | **Operating Voltage Range** | 7V to 13.8V DC | | **Rated Current** | Approx. 2.0A - 2.5A (High Power) | | **Rated Input** | 24W - 30W | | **Rated Speed** | ~16,000 - 18,000 RPM | | **Max Airflow** | ~50 - 60 CFM | | **Max Static Pressure** | ~600 - 800 Pa | | **Bearing Type** | Dual Ball Bearing | | **Dimensions** | 40 x 40 x 28 mm (Standard 4028) | --- ### 2. Internal Electronic Components The "brains" of the W2PV series consist of several critical electronic subsystems: * **Brushless DC (BLDC) Motor Driver:** Uses a specialized IC to manage the switching of the stator coils, eliminating the need for brushes and reducing electrical noise. * **PWM Control Circuit:** The "Q" or specific suffix usually denotes a 4-wire interface. This allows for Pulse Width Modulation (PWM) to control the fan speed dynamically based on the system temperature. * **Tachometer (Speed Sensor):** A Hall-effect sensor provides a frequency signal (usually 2 pulses per revolution) back to the motherboard/controller to monitor the fan's RPM. * **Protection Circuitry:** * *Locked Rotor Protection:* Automatically cuts or reduces power if the blades are obstructed to prevent coil burnout. * *Reverse Polarity Protection:* Prevents damage if the DC leads are connected incorrectly. --- ### 3. Pinout Configuration (4-Wire) Since this is an "intelligent" electronic part, it typically follows this wiring convention: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Black** | GND | Ground (0V) | | **Red** | VCC | Positive Power Supply (+12V) | | **Yellow** | Sensor (Tach) | Output signal for RPM monitoring | | **Blue** | Control (PWM) | Input signal for speed control (25kHz typical) | --- ### 4. Application Context Due to the **high current draw** and **extremely high RPM**, this part is not intended for standard consumer PCs. The electronic design focuses on: 1. **High Static Pressure:** To push air through dense heat sinks or tightly packed server blades. 2. **Longevity:** Dual ball bearings and high-grade capacitors in the driver circuit ensure a long Mean Time Between Failures (MTBF), often exceeding 40,000 hours at 60°C.