The **AFB0405MB-R00** is a high-performance DC axial fan manufactured by Delta Electronics. It belongs to the AFB series, which is known for its reliability and balance between airflow and acoustic noise. --- ### 1. Technical Specifications The following table outlines the primary electrical and mechanical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Input Voltage** | 5V DC | | **Operating Voltage Range** | 4.0V to 5.6V | | **Rated Current** | 0.16A (Max 0.24A) | | **Input Power** | 0.80W | | **Rated Speed** | 5000 RPM | | **Max Airflow** | 6.53 CFM (0.185 m³/min) | | **Max Static Pressure** | 3.52 mmH2O | | **Noise Level** | 24.0 dB-A | | **Bearing Type** | Ball Bearing | --- ### 2. Key Electronic Components & Features #### A. Brushless DC (BLDC) Motor The fan utilizes a 3-phase or single-phase brushless motor design. This eliminates the friction and sparking associated with carbon brushes, leading to a significantly longer lifespan (L10 life expectancy of approximately 70,000 hours at 40°C). #### B. Control IC and Sensors The internal PCB contains a specialized motor driver IC that manages: * **Commutation:** Switching the magnetic fields to maintain rotation. * **Soft Start:** Reducing inrush current during power-up to protect the power supply. * **Locked Rotor Protection:** Automatically cutting or reducing power if the blades are obstructed to prevent the coils from burning out. #### C. The "R00" Suffix (Sensor Output) The **R00** designation is critical. It indicates the specific signal output type: * **Rotation Detector (RD):** This is a "Locked Rotor Alarm." Under normal operation, the signal output is **Low**. If the fan stops rotating due to a failure or obstruction, the output signal flips to **High**. * **Interface:** It is typically an open-collector output, requiring an external pull-up resistor to interface with a microcontroller (MCU). --- ### 3. Physical Dimensions The part follows a standard form factor for small electronics cooling: * **Size:** 40mm x 40mm * **Thickness:** 13mm * **Housing/Blade Material:** UL 94V-0 Plastic (Flame retardant) --- ### 4. Wire Configuration Typically, this model features three wires: 1. **Red:** Positive (+5V) 2. **Black:** Negative (GND) 3. **Blue (or White):** RD Signal (Locked Rotor Alarm) ---