The **M2SES-1HA-R** is a specific electronic component, typically categorized as an **SFP (Small Form-factor Pluggable) Stacked Connector**. These are critical hardware interfaces used primarily in networking equipment like switches, routers, and servers to facilitate high-speed data transfers. --- ## 1. Technical Specifications The following table outlines the typical physical and electrical characteristics of this connector series: | Feature | Specification | | :--- | :--- | | **Component Type** | SFP (Small Form-factor Pluggable) | | **Configuration** | 2-row Stacked (2x1) | | **Number of Positions** | 40 (20 per port) | | **Mounting Type** | Through Hole / Press-fit | | **Data Rate** | Up to 4.25 Gbps (standard) or higher depending on revision | | **Shielding** | Integrated Metal Cage / EMI Shielding | --- ## 2. Key Electronic Parts & Features ### A. The Connector Interface The internal part consists of a high-density, 20-pin gold-plated interface. This is designed to accept SFP transceiver modules (Fiber optic or Copper). The "Stacked" nature means it houses two ports vertically to save PCB (Printed Circuit Board) real estate. ### B. EMI Shielding (The Cage) The "R" in the suffix often denotes specific revisions or packaging (like Reel or RoHS compliance). The metal cage surrounding the connector serves two purposes: 1. **Mechanical Support:** Provides a guide and latching mechanism for the SFP module. 2. **Electromagnetic Interference (EMI) Protection:** Prevents high-frequency noise from escaping the device or interfering with adjacent signals. ### C. Press-Fit Terminals Instead of traditional soldering, many of these parts use **"Eye-of-the-needle"** compliant pins. This allows the part to be pressed into the PCB, creating a reliable gas-tight connection without the thermal stress of soldering. --- ## 3. Common Applications * **Networking:** Ethernet switches and high-speed routers. * **Storage:** Fiber Channel Host Bus Adapters (HBAs) and Storage Area Networks (SANs). * **Telecommunications:** Base stations and central office switching equipment. --- ## 4. Pinout Overview A standard SFP connector within this assembly follows the **SFF-8431** or similar standards: | Pin # | Symbol | Description | | :--- | :--- | :--- | | 1 | VeeT | Transmitter Ground | | 2 | TX Fault | Transmitter Fault Indication | | 3 | TX Disable | Optical Output Disabled | | 12 | RD- | Receiver Inverted Data Output | | 13 | RD+ | Receiver Non-Inverted Data Output | | 18 | TD+ | Transmitter Non-Inverted Data Input | ---