The **M2CEC-250D-R** is a specific electronic component, typically identifying a **D-Sub Hardware/Connector Accessory** or a high-performance **Interconnect Solution** used in industrial and military-grade applications. Below is a breakdown of its electronic characteristics and specifications. --- ### 1. Component Overview The M2CEC series generally refers to high-reliability connector accessories, specifically **Backshells** or **Strain Relief** components designed for D-Subminiature connectors. The "250D" designation often relates to the shell size or entry angle. ### 2. Technical Specifications | Feature | Description | | :--- | :--- | | **Component Type** | Connector Backshell / Hood | | **Material** | Die-cast Zinc or Aluminum Alloy | | **Plating** | Nickel or Chromate (High corrosion resistance) | | **Entry Type** | Top Entry (usually 180 degrees) | | **Shielding** | EMI/RFI Shielding capabilities | | **Thread Size** | Typically 4-40 UNC for mounting screws | --- ### 3. Key Electronic Functions The M2CEC-250D-R serves three primary electronic/mechanical purposes in a circuit assembly: * **EMI/RFI Protection:** The metallic construction acts as a Faraday cage, preventing electromagnetic interference from affecting the signals passing through the pins and protecting the environment from radiated noise. * **Strain Relief:** It secures the cable to the connector body, ensuring that mechanical tension (pulling/twisting) does not break the solder joints or crimp connections inside the housing. * **Grounding Continuity:** When used with shielded cables, the backshell provides a low-impedance path to ground, maintaining the integrity of the shielding across the entire cable assembly. --- ### 4. Part Number Breakdown (Typical) While naming conventions vary by manufacturer (such as MH Connectors or NorComp), the code generally follows this logic: 1. **M2CEC:** Series prefix (Metal/Shielded Cover). 2. **250:** Physical size or cable entry diameter (e.g., for 25-pin D-sub). 3. **D:** Denotes the "D" subminiature compatibility. 4. **R:** Indicates **RoHS Compliance** (Restriction of Hazardous Substances). --- ### 5. Common Applications * **Industrial Automation:** Connecting PLC units to human-machine interfaces. * **Telecommunications:** Shielded data transmission lines. * **Medical Equipment:** Where signal integrity and low noise are critical. * **Military/Aerospace:** Ruggedized environments requiring durable metal housings.