## Technical Overview: Delta FFB0924VH-R00 The **FFB0924VH-R00** is a high-performance industrial axial fan manufactured by Delta Electronics. It is specifically designed for high-static pressure applications, common in servers and heavy-duty industrial equipment. ### Core Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | Delta Electronics | | **Frame Size** | 92mm x 92mm x 25.4mm | | **Rated Voltage** | 24V DC | | **Operating Voltage Range** | 14.0V to 27.6V DC | | **Input Current** | 0.40A (Max 0.60A) | | **Speed** | 4500 RPM | | **Airflow** | 100.29 CFM (2.840 m³/min) | | **Static Pressure** | 0.572 in H₂O (14.53 mmH₂O) | | **Noise Level** | 52.5 dB(A) | --- ### Electronic Components & Features The "R00" suffix in the model number provides specific information regarding its electronic signaling and protection features: #### 1. Sensor Type: Locked Rotor Alarm (R00) Unlike the "F00" models which provide a Tachometer (Frequency Generator) output to measure RPM, the **R00** indicates a **Locked Rotor Signal**. * **Function:** The third wire (usually white) sends a logic signal to the system to indicate whether the fan motor is spinning or stalled. * **Signal Logic:** Usually, the signal is "Low" during normal operation and goes "High" if the fan is obstructed or stops spinning. #### 2. Motor Design * **Brushless DC (BLDC):** The fan uses a 3-phase or split-phase brushless motor, which reduces friction and electronic noise compared to brushed motors. * **Bearing System:** Equipped with **Dual Ball Bearings**. These are rated for high-temperature environments and provide a significantly longer L10 life (approx. 70,000 hours at 40°C) compared to sleeve bearings. #### 3. Protection Circuitry The internal PCB includes several protective electronic layers: * **Polarity Protection:** Prevents damage if the positive and negative leads are accidentally reversed. * **Auto-Restart:** If the blades are physically blocked, the IC cuts power to the coils to prevent overheating and periodically attempts to restart the motor once the obstruction is removed. --- ### Wire Configuration | Wire Color | Function | Description | | :--- | :--- | :--- | | **Red** | VCC (+) | Positive 24V DC Input | | **Black** | GND (-) | Ground / Negative | | **White** | RD (Signal) | **R00 Sensor:** Locked Rotor Alarm output | --- ### Application Note Because of its **high RPM (4500)** and **high noise level (52.5 dB)**, this fan is not suitable for home desktop PCs or quiet environments. It is engineered for: * Network switches and routers. * Industrial power supplies. * Server rack cooling where high static pressure is required to push air through dense components.