The **M3STV-45-R/Q** is a high-performance, shielded cable assembly from the **M3** series manufactured by **3M**. It is specifically designed for high-density electronic interconnections, typically used in industrial automation, testing equipment, and telecommunications. ### 1. General Specifications The part number breaks down into specific technical attributes regarding the connector type, pin count, and shielding. | Feature | Specification | | :--- | :--- | | **Manufacturer** | 3M | | **Connector Type** | Socket to Plug (Molded) | | **Number of Positions** | 45-Pin | | **Cable Type** | Flat Ribbon (Shielded/Jacketed) | | **Length** | Usually defined by the "45" or specific suffix (check datasheet for exact meters/feet) | | **Shielding** | Yes (R/Q denotes specific EMI/RFI protection) | --- ### 2. Key Electronic Components & Materials #### A. The Connectors The assembly uses **IDC (Insulation Displacement Connectors)**. * **Contacts:** Usually made of Copper Alloy with Gold plating over Nickel. The gold plating ensures low contact resistance and prevents oxidation. * **Housing:** Glass-filled thermoplastic (PBT), which provides high insulation resistance and thermal stability. #### B. The Cable * **Conductors:** Stranded Tinned Copper (typically 28 AWG or 30 AWG). Tinned copper offers a balance between flexibility and corrosion resistance. * **Insulation:** PVC or TPE, providing dielectric strength to prevent short-circuiting between adjacent lines. * **Shielding:** A specialized expanded copper mesh or aluminum foil shield is wrapped around the internal ribbon to mitigate **Electromagnetic Interference (EMI)**. #### C. Environmental Compliance The "R/Q" designation often refers to: * **RoHS Compliance:** Ensuring the electronic parts are lead-free. * **UL Rating:** The cable is rated for specific voltage (usually 300V) and temperature (usually 80°C or 105°C). --- ### 3. Functional Applications Because of the 45-position configuration and the shielding, this part is used in: 1. **Data Transmission:** High-speed signal integrity where external noise must be blocked. 2. **Medical Instrumentation:** Where signal precision is critical. 3. **IO Expansion:** Connecting PCBs (Printed Circuit Boards) to external peripherals in a rugged environment. --- ### 4. Technical Pinout (Standard Example) While pinouts can be custom, the standard 45-pin electronic layout follows a staggered pattern: ```yaml Pin 1: VCC / Signal High Pin 2: Ground (GND) ... Pin 44: Signal Low Pin 45: Ground / Shield Drain ```