The **AFB0924H-R00** is a high-performance DC axial fan manufactured by Delta Electronics. It is part of the AFB series, known for reliability and efficient cooling in industrial and server environments. --- ### 1. Technical Specifications The following table highlights the core electronic and mechanical parameters of the device: | Parameter | Specification | | :--- | :--- | | **Rated Voltage** | 24V DC | | **Operating Voltage Range** | 14.0V to 27.6V DC | | **Rated Current** | 0.17A (Max 0.25A) | | **Rated Input Power** | 4.08W | | **Speed** | 2850 RPM | | **Maximum Air Flow** | 47.32 CFM (1.340 m³/min) | | **Noise Level** | 34.0 dB-A | | **Bearing Type** | Ball Bearing (Dual) | | **Dimensions** | 92 x 92 x 25.4 mm | --- ### 2. Key Electronic Features The "R00" suffix in the model number defines specific electronic signaling and protection features: * **R00 Sensor (Locked Rotor Alarm):** This model features a **Sensor Signal Output**. Specifically, the R00 designation indicates a "Low" output signal when the fan is running normally and a "High" signal (Logic 1) when the rotor is stalled or stopped. * **Brushless DC Motor (BLDC):** It utilizes a permanent magnet rotor and an electronically commutated stator, reducing wear and electromagnetic interference (EMI). * **Protection Circuits:** * **Polarity Protection:** Prevents damage if the positive and negative leads are reversed. * **Locked Rotor Protection:** Automatically shuts off or limits current if the blades are obstructed to prevent the motor coils from burning out. --- ### 3. Wire Configuration and Pinout The fan typically comes with three wires, color-coded as follows: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Red** | **+24V DC** | Power Input | | **Black** | **GND** | Ground (0V) | | **Blue/White** | **RD Signal** | "Rotation Detector" - The alarm signal output | --- ### 4. Application Context Due to its 24V rating and ball-bearing construction, this part is commonly used in: 1. **Industrial Control Cabinets:** Where 24V rails are standard. 2. **Medical Equipment:** Requiring high reliability and long MTBF (Mean Time Between Failures). 3. **Telecommunications:** Used for cooling rack-mounted hardware.