## Technical Overview of the Delta AFB0912H-R00 The **AFB0912H-R00** is a high-performance axial cooling fan manufactured by Delta Electronics. It belongs to the AFB series, which is known for its balance of high airflow and reliable electronic protection features. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Rated Voltage** | 12 VDC | | **Operating Voltage Range** | 7.0 to 13.8 VDC | | **Rated Current** | 0.20 A (Max 0.30 A) | | **Input Power** | 2.40 W | | **Speed** | 2850 RPM | | **Max Airflow** | 51.91 CFM (1.470 m³/min) | | **Max Air Pressure** | 4.47 mmH2O | | **Noise Level** | 35.0 dB-A | | **Bearing Type** | Dual Ball Bearing | --- ### 2. Electronic Component Features The "R00" suffix in the model number defines the specific electronic signaling and protection logic built into the fan's PCB: #### A. Locked Rotor Sensor (R00) The **R00** designation indicates that this fan is equipped with a **Locked Rotor Alarm**. * **Function:** When the fan is running normally, the signal output is at a "Low" voltage level. * **Trigger:** If the fan blades are obstructed and the motor stops rotating, the internal sensor switches the output to a "High" voltage level. * **Usage:** This is used by system controllers to trigger emergency shutdowns or alerts if a cooling failure is detected. #### B. Brushless DC (BLDC) Motor Logic The fan utilizes a 3-phase or single-phase brushless motor (depending on the internal IC revision) which uses electronic commutation rather than mechanical brushes. This reduces electromagnetic interference (EMI) and extends the lifespan of the electronics. #### C. Built-in Protections * **Polarity Protection:** Prevents damage to the internal circuitry if the positive and negative wires are accidentally reversed. * **Auto-Restart:** If a stall is detected and cleared, the internal IC will attempt to restart the motor automatically after a few seconds. --- ### 3. Wiring and Pinout Configuration The AFB0912H-R00 typically features a 3-wire lead configuration: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Red** | VCC | Positive Power Supply (+12V) | | **Black** | GND | Ground (0V) | | **Blue** | RD (Alarm) | Locked Rotor Output Signal | --- ### 4. Mechanical & Material Construction * **Frame & Impeller:** Plastic (UL 94V-0) to ensure fire safety and lightweight performance. * **Bearing System:** Dual Ball Bearings, which provide a significantly longer MTBF (Mean Time Between Failures) compared to sleeve bearings, especially in high-temperature environments. ---