## Overview of M3SMS-G-R/Q The **M3SMS-G-R/Q** is a specific part number typically associated with high-quality **Modular Plug/Cable Assemblies** or specialized **D-Sub connectors**, often manufactured by companies like **3M** or **Assmann WSW Components**. Based on standard electronic component nomenclature, this part is part of a series designed for robust board-to-cable or cable-to-cable connections. --- ### Technical Specifications | Feature | Specification Details | | :--- | :--- | | **Component Type** | D-Sub Cable Assembly (Socket to Socket) | | **Number of Positions** | 25 (Standard DB25 configuration) | | **Connector Type** | Female Socket to Female Socket | | **Cable Length** | Usually 3.00' (914.40mm) | | **Shielding** | Unshielded (Standard Ribbon) | | **Pitch** | 0.050" (1.27mm) for cable; 0.109" for D-Sub interface | | **Color** | Gray (Ribbon Cable) | --- ### Key Electronic Components & Materials 1. **Contact Material**: Usually a copper alloy with gold plating in the mating area and tin/lead or matte tin on the termination ends. This ensures low contact resistance and high durability. 2. **Insulator**: High-temperature thermoplastic (UL94V-0 rated), designed to handle environmental stress without cracking. 3. **Strain Relief**: The "R" in the suffix often denotes the inclusion of a **Strain Relief** clip, which prevents the ribbon cable from pulling away from the IDC (Insulation Displacement Connector) contacts. 4. **IDC Termination**: The connector uses Insulation Displacement technology, where the metal pins pierce the cable insulation to make contact with the internal stranded wire, ensuring a gas-tight connection. --- ### Typical Applications * **Legacy Computing**: Connecting parallel printers or older serial devices to motherboards. * **Industrial Automation**: Interfacing between PLCs (Programmable Logic Controllers) and CNC machinery. * **Testing Equipment**: Used in diagnostic benches where DB25 ports are standard for data acquisition. --- ### Part Number Breakdown (Generalized) | Prefix/Suffix | Meaning | | :--- | :--- | | **M3** | Manufacturer series designation (e.g., 3M Series) | | **SMS** | Socket to Socket configuration | | **G** | Gold plating thickness/quality indicator | | **R** | Strain Relief included | | **Q** | Specific length or packaging code (sometimes signifies a 25-position variant) |