The **AFB1212SH-R00** is a high-performance axial fan manufactured by Delta Electronics. It is widely used in servers, industrial workstations, and telecommunications equipment due to its high airflow capabilities. --- ### ## Technical Specifications The following table summarizes the key electrical and physical parameters: | Feature | Specification | | :--- | :--- | | **Model Number** | AFB1212SH-R00 | | **Frame Size** | 120mm x 120mm x 25.4mm | | **Rated Voltage** | 12V DC | | **Voltage Range** | 7.0V to 13.8V DC | | **Rated Current** | 0.80A (Max 1.20A) | | **Input Power** | 9.60 Watts | | **Speed** | 3400 RPM | | **Max Airflow** | 113.11 CFM (3.203 m³/min) | | **Static Pressure** | 0.430 in H₂O (10.92 mm H₂O) | | **Noise Level** | 46.5 dB(A) | | **Bearing Type** | Dual Ball Bearing | --- ### ## Electronic Components & Wiring The **-R00** suffix in the model number designates a specific electronic output signal provided by the fan's internal circuitry. #### 1. The Sensor: Lock Sensor (R00) Unlike the "-F00" models which provide Tachometer (speed) output, the **-R00** stands for **Rotary Lock Signal**. * **Function:** It monitors whether the fan motor is spinning. * **Logic:** * When the fan is **running**, the signal stays at a "Low" voltage level. * When the fan is **stopped/locked**, the signal switches to a "High" voltage level. * **Purpose:** This is used by system controllers to trigger an immediate alarm if a cooling failure occurs. #### 2. Wiring Pinout The fan typically features three wires: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Red** | Power (+) | Positive 12V DC input. | | **Black** | Ground (-) | Negative / Common return. | | **Blue/White** | Lock Sensor | Open Collector output for lock detection. | #### 3. Protection Features * **Polarity Protection:** Prevents damage if the positive and negative leads are reversed. * **Locked Rotor Protection:** The internal IC will automatically shut off power to the coils if the blades are obstructed to prevent the motor from overheating or burning out. --- ### ## Internal Construction * **Motor Type:** Brushless DC (BLDC) motor with a 4-pole design. * **Bearing System:** It utilizes **Dual Ball Bearings**, which are superior to sleeve bearings for high-temperature environments and provide a much longer lifespan (MTBF of approx. 70,000 hours). * **Housing/Impeller:** Constructed from UL 94V-0 rated plastic (PBT), ensuring flame retardancy.