The **M2REB-S4D-R** is a specific part number belonging to the **M2 series** of high-speed, board-to-board connectors, typically manufactured by **JAE (Japan Aviation Electronics)**. These components are designed for high-density mounting and high-speed signal transmission. --- ## Technical Specifications The following table outlines the key electrical and physical characteristics of this component series: | Parameter | Specification | | :--- | :--- | | **Connector Type** | Receptacle (Board-to-Board) | | **Pitch** | 0.5 mm | | **Number of Contacts** | 40 (Commonly indicated by the '4' or '40' coding) | | **Mounting Type** | Surface Mount (SMT) | | **Orientation** | Right-Angle / Straight (Depending on exact suffix) | | **Rated Current** | 0.5A per contact | | **Rated Voltage** | 50V AC/DC | | **Transmission Speed** | Supports PCIe Gen3, USB 3.0, and SATA 3.0 | --- ## Component Breakdown The part number follows a specific nomenclature used by the manufacturer: ### 1. High-Speed Interface The M2 series is specifically engineered to handle differential signaling with minimal crosstalk and impedance mismatch. This makes it ideal for applications requiring high bandwidth in a small footprint. ### 2. Contact Design * **Gold Plating:** The "R" suffix often indicates "RoHS compliant" and refers to the finish (usually gold over nickel) to ensure low contact resistance and prevent oxidation. * **Dual Contact:** The internal structure usually features a two-point contact design to ensure reliability under high-vibration environments. ### 3. Application Areas * **Computing:** Internal connections for laptops, tablets, and servers. * **Storage:** Connecting SSDs or high-speed interface cards. * **Industrial:** High-density PLC modules and vision systems. --- ## Connection Diagram (Logic) ```mermaid graph LR A[Main Board] -- M2REB-S4D-R --> B[Daughter Card/Module] B -- Signal Return --> A style A fill:#f9f,stroke:#333 style B fill:#bbf,stroke:#333 ``` --- ## Key Features * **Compact Form Factor:** The 0.5mm pitch allows for a very high number of I/O pins in a limited PCB area. * **EMI Shielding:** Many versions of this series include metal shells to provide grounding and reduce electromagnetic interference. * **Mechanical Locking:** Features a secure "click" feel or friction lock to prevent accidental disconnection.