The **M3SWVS-DDY-R** is a specific part number for a pre-assembled ribbon cable assembly manufactured by **3M**. This component is primarily used for internal board-to-board connections or interfacing peripherals where a multi-pin parallel connection is required. --- ### 1. Part Number Breakdown To understand the electronic specifications, we can decode the 3M nomenclature: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | M3 | 3M standard assembly series | | **Connector A** | S | Socket (IDC) with Strain Relief | | **Connector B** | W | Wall Mount Header (Latch/Eject type) | | **Cable Type** | V | Color-coded (Rainbow) PVC Ribbon Cable | | **Pin Count** | DD | Represents the number of positions (e.g., 26, 34, 40, 50) | | **Length** | Y | Length code (e.g., 06 = 6 inches, 18 = 18 inches) | | **RoHS** | -R | RoHS Compliant | --- ### 2. Physical and Electrical Specifications The assembly consists of three primary electronic sub-components: #### A. Socket Connector (Connector A) * **Type:** IDC (Insulation Displacement Connector) Socket. * **Pitch:** 0.100" (2.54 mm). * **Strain Relief:** Includes a plastic clip to prevent wire fatigue at the contact point. * **Keying:** Usually features a center bump (polarization key) to prevent incorrect insertion. #### B. Wall Mount Header (Connector B) * **Type:** Shrouded Header with "Long Ejector Latches." * **Function:** This side is designed to plug into a PCB-mounted header. The latches secure the connection and provide a mechanical lever to eject the cable without pulling on the wires. #### C. The Ribbon Cable * **Material:** PVC Insulation with Stranded Tinned Copper conductors. * **Color Scheme:** Typically "Rainbow" (10-color repeat) to allow for easy wire identification and troubleshooting. * **Voltage Rating:** Generally rated for 300V. * **Current Rating:** Typically 1A per conductor. --- ### 3. Common Applications * **Industrial Controls:** Connecting PLC units to interface modules. * **Computing:** Legacy drive interfaces or internal proprietary bus expansions. * **Prototyping:** Connecting development boards to LCDs or sensor arrays where multiple signal lines are needed. --- ### 4. Technical Summary Table | Feature | Specification | | :--- | :--- | | **Pitch** | 2.54 mm (0.1 in) | | **Number of Rows** | 2 Rows | | **Termination Style** | IDC (Cold-pressed) | | **Cable Jacket** | Polyvinyl Chloride (PVC) | | **Operating Temp** | -20°C to +105°C (Standard PVC) |