The **F17255BDM-R** is a specific model of an **AC Axial Fan**, typically manufactured by brands like Fulltech or similar industrial cooling solution providers. This component is designed for high-performance thermal management in electronic enclosures and server racks. --- ## 1. Technical Specifications The following table highlights the core electrical and mechanical characteristics of the F17255BDM-R: | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 220V - 240V AC | | **Frequency** | 50 / 60 Hz | | **Input Power** | ~40W to 50W (depending on frequency) | | **Bearing Type** | Dual Ball Bearing | | **Dimensions** | 172mm x 150mm x 51mm | | **Housing Material** | Die-Cast Aluminum | | **Impeller Material** | Thermoplastic PBT (UL 94V-0) | | **Speed** | ~2,700 - 3,000 RPM | | **Termination** | Terminal Block or Lead Wires | --- ## 2. Key Electronic Features ### A. Dual Ball Bearing System The "BDM" suffix usually denotes a **Ball Bearing** construction. Dual ball bearings are superior to sleeve bearings in industrial settings because: * They support mounting in any orientation (horizontal, vertical, or angled). * They offer a significantly longer MTBF (Mean Time Between Failures), often exceeding 50,000 hours. ### B. Shaded Pole or Capacitor Run Motor As an AC fan, it utilizes an induction motor. These are highly reliable because they do not require brushes that wear out. The motor is typically protected against impedance or thermal overload. ### C. Environmental Protection The "-R" suffix often indicates specific compliance or a revision: * **RoHS Compliance:** The materials used are free from hazardous substances like lead and mercury. * **IP Rating:** Many fans in this series are treated with moisture-resistant coatings for use in humid environments. --- ## 3. Pinout and Connection Unlike DC fans which use 3 or 4-pin PWM headers, this AC fan typically uses a simple two-terminal connection. ```text L (Line) -----> [ Terminal 1 ] N (Neutral) ----> [ Terminal 2 ] GND (Earth) ----> [ Chassis Screw ] ``` *Note: Since it is AC, polarity between Line and Neutral does not affect the direction of rotation, but proper grounding to the aluminum frame is essential for safety.* --- ## 4. Typical Applications * **Industrial Control Panels:** Cooling PLCs and power supplies. * **Server Racks:** High-volume air displacement for data centers. * **Power Inverters:** Dissipating heat from large MOSFETs and transformers.