The **M3A64FAD-R** is a specific electronic hardware component, commonly identified as a **high-speed backplane connector** or a specialized **PCB interconnect assembly** often used in telecommunications, server infrastructure, and industrial computing. Below is a breakdown of its technical characteristics and electronic composition. --- ### 1. General Specifications The part belongs to a class of heavy-duty, high-density interconnects. These are designed to bridge signals between a motherboard (backplane) and daughtercards (line cards). | Feature | Description | | :--- | :--- | | **Component Type** | High-Density Backplane Connector / Header | | **Mounting Type** | Through-hole / Press-fit (Compliant Pin) | | **Application** | Data centers, Network Switches, Medical Imaging | | **Signal Integrity** | Optimized for Differential Pair signaling | --- ### 2. Key Electronic Parts and Design The "electronic" nature of this part is found in its physical architecture, which is engineered to manage electrical impedance and signal loss. #### A. Contact Material and Plating * **Base Metal:** Usually a Copper Alloy (Phosphor Bronze or Beryllium Copper) for high conductivity and mechanical spring retention. * **Plating:** The contact points are typically plated with **Gold (Au)** over **Nickel (Ni)**. This prevents oxidation and ensures low contact resistance over hundreds of mating cycles. #### B. The Housing (Dielectric) * **Material:** High-temperature Liquid Crystal Polymer (LCP) or Thermoplastic. * **Function:** It acts as an insulator between the pins. The dielectric constant of this plastic is precisely controlled to maintain **100-ohm differential impedance**, preventing signal reflections in high-speed data paths. #### C. Press-Fit Pins (Eye-of-the-Needle) * Instead of traditional soldering, these parts often use "Press-fit" technology. * **Benefit:** This creates a cold-welded electrical connection between the pin and the PCB barrel, reducing thermal stress on the board and providing a cleaner electrical path than solder paste. --- ### 3. Electrical Performance Characteristics If you are integrating this into a circuit, these are the primary electronic constraints: 1. **Current Rating:** Typically ranges from **0.5A to 1.5A per pin**, depending on the specific grid configuration. 2. **Voltage Rating:** Generally rated for **30V - 250V AC/DC**, though primarily used for low-voltage logic signals. 3. **Data Rates:** Designed to support protocols like **PCIe Gen 3/4**, Ethernet (10G/40G/100G), and SAS/SATA, handling frequencies into the Gigahertz (GHz) range. --- ### 4. Typical Usage Scenario In a system like a blade server, the **M3A64FAD-R** serves as the physical bridge: * **Input:** Receives high-speed LVDS (Low Voltage Differential Signaling) from a CPU or FPGA. * **Transmission:** Maintains signal symmetry to minimize "skew" (timing differences between the positive and negative signals). * **Output:** Delivers the signal to the backplane with minimal EMI (Electromagnetic Interference). ---