The **W2AP-G35-R/N** is a specific model identifier typically associated with **Delta Electronics** high-performance industrial cooling fans, often used in servers, telecommunications equipment, and power supplies. --- ### 1. General Specifications Based on the part numbering convention for industrial axial fans, here are the primary electronic and physical characteristics: | Feature | Specification | | :--- | :--- | | **Component Type** | DC Axial Fan | | **Frame Size** | 35mm x 35mm x 28mm (Typical) | | **Rated Voltage** | 12V DC | | **Bearing Type** | Dual Ball Bearing (indicated by "B" or "W" series traits) | | **Termination** | Wire Leads (usually 3 or 4 wires) | --- ### 2. Electronic Component Breakdown The internal circuitry of this part consists of several key electronic subsystems: #### A. The Brushless DC (BLDC) Motor Unlike brushed motors, this part uses an electronic commutator. * **Stator:** Fixed copper windings that create an electromagnetic field. * **Rotor:** Permanent magnets attached to the fan blades. #### B. Integrated Circuit (IC) Controller The "brain" of the fan is a small PCB located at the hub. It performs: * **Hall Effect Sensing:** Detects the position of the rotor magnets to time the switching of the coils. * **Soft Start:** Gradually increases voltage to prevent a massive current spike upon power-up. * **Auto-Restart:** If the blades are obstructed, the IC cuts power and periodically attempts to restart to protect the motor coils from burning out. #### C. Control and Monitoring Signals (R/N Suffix) The suffix **-R/N** usually denotes the specific electronic output configuration: * **R (Rotation Detector / Locked Rotor Alarm):** A signal that stays "Low" when the fan is spinning and goes "High" if the fan stops. * **N (Negative Logic/Speed Control):** Often implies a specific wiring logic for PWM (Pulse Width Modulation) or a tachometer (FG) output that monitors RPM. --- ### 3. Key Electronic Protections The internal PCB includes several protective components to ensure longevity: 1. **Polarity Protection:** A diode prevents damage if the positive and negative wires are accidentally reversed. 2. **Locked Rotor Protection:** Sensors detect if the fan is stuck and limit the current to prevent overheating. 3. **TVS Diodes:** Protects the internal IC from voltage spikes or "noise" coming from the power supply. --- ### 4. Typical Pinout (4-Wire Setup) If the unit features a 4-wire connector, the electronic signals are generally assigned as follows: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Black** | GND | Ground (0V) | | **Red** | VCC | Power Supply (12V) | | **Yellow** | FG (Tacho) | Frequency Generator (measures RPM) | | **Blue** | PWM | Control signal to adjust fan speed |