The **MA7L1FAX-R** is a specific part number typically associated with **Mecatronics** or **NMB Technologies** (MinebeaMitsumi) for high-performance industrial cooling solutions, specifically a **172mm x 150mm x 51mm AC Axial Fan**. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | NMB / MinebeaMitsumi | | **Input Voltage** | 100V - 115V AC (Single Phase) | | **Frequency** | 50 / 60 Hz | | **Dimensions** | 172mm x 150mm x 51mm | | **Bearing Type** | Dual Ball Bearing | | **Airflow** | ~190.0 CFM (5.4 m³/min) | | **Speed** | ~2,750 RPM | | **Noise Level** | ~52 dB | | **Termination** | 2 Lead Wires (or Terminals depending on variant) | --- ### 2. Electronic Components and Construction The "MA" series is designed for heavy-duty industrial environments. The electronic design focuses on longevity and thermal stability. #### A. The Motor Structure The fan utilizes a **Shaded Pole Motor** or a **Permanent Split Capacitor (PSC)** motor design (depending on the exact sub-series). * **Stator:** Laminations made of high-grade silicon steel to reduce eddy current losses. * **Windings:** Class B or Class F insulated copper windings, designed to withstand internal temperatures up to 105°C-130°C. #### B. Protection Circuitry * **Impedance Protected:** The motor is designed so that if the fan blade is obstructed (locked rotor), the internal impedance of the coils limits the current flow. This prevents the windings from overheating and catching fire without requiring a separate fuse. * **Thermal Protection:** High-end variants often include an internal thermal cutoff that breaks the circuit if the temperature exceeds safety limits. #### C. Bearings and Lifespan * **Dual Ball Bearings:** The "R" in the suffix often denotes specific revisions or environmental protections. Dual ball bearings allow the fan to be mounted in any orientation (horizontal, vertical, or angled) without affecting the **L10 Life expectancy** (typically 60,000 to 100,000 hours at 25°C). --- ### 3. Part Number Decoder (MA Series) | Segment | Meaning | | :--- | :--- | | **MA** | Series Designation (AC Axial Fan) | | **7** | Size Code (approx. 172mm) | | **L** | Thickness/Performance Grade | | **1** | Voltage Code (1 = 115V, 2 = 230V) | | **FAX** | Bearing/Housing Configuration (Fastening/Airflow type) | | **-R** | RoHS Compliant / Revision code | --- ### 4. Application Use Cases Due to its high CFM (Cubic Feet per Minute) and rugged metal frame construction, this part is commonly used in: * **Server Racks:** Main chassis cooling. * **Industrial Control Panels:** Heat dissipation for PLCs and VFDs. * **Medical Equipment:** High-reliability cooling for imaging machines. * **Power Supplies:** Cooling large scale UPS systems. ---