The **K240AD-R024-N2AT** is a specific model number for a **Brushless DC (BLDC) Fan**, typically manufactured by **Nidec** (or associated vendors). These fans are engineered for high-performance cooling in industrial equipment, servers, and power supplies. --- ### 1. Technical Specifications The model string encodes the electrical and physical characteristics of the part. Here is the breakdown of its typical electronic profile: | Feature | Specification | Description | | :--- | :--- | :--- | | **Input Voltage** | 24V DC | Standard industrial operating voltage. | | **Motor Type** | Brushless DC (BLDC) | Electronically commutated for longevity and efficiency. | | **Current / Power** | ~0.10A - 0.25A | Varies slightly by revision; optimized for low power consumption. | | **Bearing System** | Dual Ball Bearing | High reliability for 24/7 operation and high-temperature environments. | | **Termination** | Lead Wires (2-3 wires) | Standard Red (+), Black (-), and sometimes Yellow (Tachometer). | --- ### 2. Key Electronic Components Internally, the K240AD-R024-N2AT consists of several critical electronic modules: #### A. Integrated Circuit (IC) Driver Unlike brushed motors, this fan uses an **on-board driver IC**. This chip handles the switching of the electromagnetic coils based on the rotor's position, eliminating physical brushes that wear out. #### B. Hall Effect Sensor A small magnetic sensor is embedded on the PCB. It detects the position of the permanent magnet on the rotor. The IC uses this data to time the electrical pulses to the stator coils correctly. #### C. Protection Circuitry * **Locked Rotor Protection:** If the fan blades are obstructed, the internal electronics automatically cut or pulse the power to prevent the motor coils from overheating and burning out. * **Reverse Polarity Protection:** Usually includes a diode to prevent damage if the positive and negative wires are connected backwards. #### D. PWM or Tachometer Output (Variant Dependent) Depending on the specific suffix (N2AT), the fan may include: * **FG (Frequency Generator):** A "Tach" signal that sends a square wave to the motherboard to monitor RPM. * **RD (Rotation Detector):** A signal that stays low/high to indicate if the fan is spinning or stopped. --- ### 3. Physical Dimensions & Airflow While the electronics drive the motion, the physical housing is designed for specific pressure: * **Frame Size:** Typically 40mm x 40mm or 60mm x 60mm (common for the K240 series). * **Housing Material:** PBT Plastic (UL94V-0 rated), which is flame retardant and heat resistant.