The **D413-R1LD-G2** is a specialized high-performance cooling fan manufactured by **Nidec** (often under the UltraFlo series). It is primarily designed for high-density servers, workstations, and industrial equipment where significant static pressure and airflow are required. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | Nidec Corporation | | **Dimensions** | 40mm x 40mm x 28mm | | **Voltage** | 12V DC | | **Current Rating** | ~0.72A - 0.85A (varies by revision) | | **Bearing Type** | Dual Ball Bearing | | **Termination** | 4-Wire (PWM Control + Tachometer) | --- ### 2. Electronic Component Breakdown The "R1LD-G2" suffix denotes specific electronic configurations within the fan's internal PCB: #### A. 4-Wire Interface System The fan utilizes a standard 4-wire interface, but its electronic logic is tuned for server-grade motherboards: * **Red (+12V):** Main power supply. * **Black (GND):** Common ground. * **Yellow (Tachometer/FG):** Outputs a frequency signal proportional to the motor speed, allowing the system to monitor for fan failure. * **Blue (PWM Control):** Receives a Pulse Width Modulation signal to adjust the motor speed dynamically based on thermal load. #### B. Integrated Circuit (IC) & Driver The internal PCB contains a specialized **Brushless DC (BLDC) Motor Driver IC**. This chip manages: * **Soft Start:** Gradually increases current to prevent power surges on the motherboard rail during startup. * **Locked Rotor Protection:** Automatically cuts power to the coils if the blades are obstructed, preventing the motor from burning out. * **Reverse Polarity Protection:** Prevents damage if the 12V and Ground wires are accidentally swapped. #### C. Dual Ball Bearing System From an electromechanical standpoint, the "R1" series emphasizes longevity. Dual ball bearings are used because they handle the high Heat Dissipation Factor (HDF) and high RPMs (often exceeding 15,000 RPM) better than sleeve or fluid bearings. --- ### 3. Environmental and Safety Standards * **RoHS Compliant:** The electronic components and solder used are lead-free. * **G2 Designation:** Often refers to a specific generation of motor efficiency or a lead-free manufacturing revision within Nidec's catalog. --- ### 4. Typical Applications Due to the high current draw and noise levels, these electronic parts are rarely used in consumer PCs. They are found in: 1. **1U/2U Rackmount Servers:** To push air through tightly packed heatsinks. 2. **Network Switches:** High-speed routers requiring constant active cooling. 3. **Power Supplies:** High-wattage industrial PSUs.