The **MEH54ZBA-R** is a specific model of an **AC Axial Fan**, typically manufactured by companies like **NMB-MAT (MinebeaMotor)**. These fans are widely used for thermal management in industrial machinery, server racks, and power supplies. --- ### 1. Technical Specifications The part number encodes specific electrical and physical characteristics. Below is a breakdown of its typical technical profile: | Feature | Specification | | :--- | :--- | | **Input Voltage** | 100V - 115V AC (typically 50/60Hz) | | **Dimensions** | 119mm x 119mm x 38mm (Standard Square) | | **Bearing Type** | Dual Ball Bearing | | **Housing Material** | Aluminum Die-Cast | | **Impeller Material** | Plastic (UL94V-0 Rated) | | **Termination** | Lead Wires or Terminal Pins (Model dependent) | --- ### 2. Internal Electronic Components While it is an AC device, it contains several critical electronic parts to ensure safety and longevity: * **Shaded-Pole or Capacitor-Run Motor:** The internal motor uses electromagnetic induction. It consists of copper windings (stator) and a permanent magnet or induction rotor. * **Thermal Protector:** Most "Z" series fans include an impedance protection or a thermal cutoff to prevent the motor from catching fire if the blades are obstructed (locked rotor). * **Ball Bearing System:** High-precision stainless steel balls ensure low friction and an MTBF (Mean Time Between Failure) often exceeding 50,000 hours. * **Insulation System:** Classified as Class E or Class B insulation, protecting the internal wiring from high temperatures generated during continuous operation. --- ### 3. Key Performance Metrics The "MEH" series is designed for high-pressure airflow. * **Airflow:** Approximately 100–110 CFM (Cubic Feet per Minute). * **Noise Level:** Ranges between 40–50 dB(A) depending on the specific RPM. * **Rotation Speed:** Roughly 2700–3100 RPM. --- ### 4. Part Number Breakdown (NMB Convention) * **MEH:** Series designation (High-performance AC). * **54:** Likely relates to the frame size/voltage code. * **Z:** Impedance Protected motor. * **BA:** Bearing type and speed grade. * **R:** Usually denotes RoHS compliance or a specific mounting variation.