The **M2AMS2-A1-R2** is a specific technical assembly, commonly associated with the **M.2 standard** for small form-factor expansion cards and SSDs. Specifically, this part number often refers to the **M.2 Key-M Slot (Connector)** or a specific PCB assembly used in industrial or server hardware. --- ### 1. Key Technical Specifications Based on the part designation, here are the primary electronic characteristics: | Feature | Specification | | :--- | :--- | | **Connector Type** | M.2 (Formerly NGFF - Next Generation Form Factor) | | **Keying** | M-Key (Supports PCIe x4 and SATA) | | **Pin Count** | 75 Pins | | **Mounting Type** | Surface Mount (SMT) | | **Orientation** | Right-Angle / Horizontal | | **Data Throughput** | Up to PCIe Gen 4 / Gen 5 (Depending on PCB routing) | --- ### 2. Physical Electronic Components The assembly consists of several critical sub-parts that ensure signal integrity and power delivery: #### A. The Plastic Housing (Insulator) * **Material:** High-temperature Liquid Crystal Polymer (LCP). * **Function:** Prevents electrical shorting between pins and provides structural rigidity during the insertion of the M.2 card. #### B. Contact Pins (The "Gold Fingers") * **Material:** Copper alloy plated with **Gold (Au)** over Nickel. * **Purpose:** The gold plating reduces electrical resistance and prevents corrosion over time, ensuring a reliable connection for high-speed data. #### C. Soldering Pads * The bottom of the part features SMT leads designed to be reflow-soldered onto a motherboard. These pads are staggered to handle the high density of the 75-pin layout. --- ### 3. Functional Pinout Groups The electronic traces connected to this part are generally divided into three main groups: 1. **High-Speed Data Lanes:** These are differential pairs used for **PCI Express (NVMe)** or **SATA**. They require precise impedance matching (usually 85-100 ohms). 2. **Power Delivery:** Pins dedicated to providing **3.3V** to the module. In high-performance M.2 drives, these pins must handle significant current (up to 2.5A). 3. **Control Signals:** Includes the **Reset (PERST#)** signal, **Clock (REFCLK)**, and the **Presence Detect** pin which tells the motherboard a device has been inserted. --- ### 4. Common Application Use-Cases * **Industrial PCs:** Used for reliable SSD storage in harsh environments. * **Networking Gear:** Housing Wi-Fi or LTE/5G modules (though usually A or E keyed, M-key is used for storage). * **Motherboards:** Serving as the interface for NVMe Gen 4 SSDs.