The **M6SWVS-4D-R/UL** is a specialized high-performance cooling fan component, typically manufactured by **Nidec (Servo)**. It is widely used in industrial equipment, servers, and power supplies where high reliability and specific airflow characteristics are required. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Nidec / Nidec Servo | | **Type** | DC Axial Fan | | **Voltage (Rated)** | 12V DC (Standard for the series) | | **Dimensions** | 60mm x 60mm x 25mm (Standard 6025 frame) | | **Bearing Type** | Dual Ball Bearing (for long life) | | **Safety Certification** | UL (Underwriters Laboratories) Recognized | | **Termination** | Wire Leads (usually 4-wire for PWM/Tach) | --- ### 2. Electronic Components & Signal Interface The "4D" in the model name often refers to the **4-wire configuration**, which provides advanced control capabilities beyond basic power and ground. #### Wiring Pinout (Standard Industry Colors): * **Red (+):** Positive Power Supply (VDC). * **Black (-):** Ground (GND). * **Yellow (Tachometer):** Also known as the "Frequency Generator" (FG) signal. It outputs a square wave proportional to the fan speed, allowing the system to monitor if the fan is spinning or stalled. * **Blue (PWM):** Pulse Width Modulation input. This allows the motherboard or controller to adjust the fan speed dynamically (0-100% duty cycle) to balance cooling needs and noise. --- ### 3. Electronic Protection Features This specific part includes several integrated electronic safeguards within its internal PCB: 1. **Polarity Protection:** Prevents damage if the positive and negative leads are accidentally reversed during installation. 2. **Locked Rotor Protection:** If the fan blades are physically obstructed, the electronics will automatically cut power to the motor coils to prevent overheating/burnout, then attempt to restart periodically. 3. **Soft Start:** Reduces the initial current inrush when the device powers on, protecting the power supply rails from sudden voltage drops. --- ### 4. Application Use Cases Because of the **UL certification** and **Ball Bearing** design, this part is chosen for: * **Networking Gear:** Routers and switches requiring 24/7 operation. * **Medical Equipment:** Devices needing high MTBF (Mean Time Between Failures). * **Industrial Power Supplies:** High-density power converters that generate significant heat. ---