The **M2MS-D-R** refers to a specific series of high-performance Micro-D (MIL-DTL-83513 type) connectors, typically manufactured by companies like **Glenair** or **ITT Cannon**. These connectors are designed for space-constrained applications requiring high reliability and environmental resistance. --- ### 1. Technical Specifications Overview The M2MS series is part of the Micro-D family, which is roughly 1/3 the size of a standard D-Sub connector. | Parameter | Specification | | :--- | :--- | | **Connector Type** | Micro-D (Rectangular) | | **Contact Pitch** | 0.050" (1.27 mm) | | **Current Rating** | 3 Amps maximum | | **Operating Temp** | -55°C to +125°C (standard) | | **Dielectric Strength** | 600 VAC at sea level | | **Contact Material** | Copper Alloy, Gold Plated (50 microinches) | --- ### 2. Breakdown of the Model Code While specific prefixes vary by manufacturer, the **M2MS-D-R** nomenclature generally breaks down as follows: * **M2MS**: Series identifier (Micro-D, typically for PCB or Solder Cup applications). * **-D**: Designates the mounting or body style (often "D" for standard profile or specific density). * **-R**: Indicates **RoHS Compliance**. This means the plating and materials are lead-free and do not contain restricted hazardous substances. --- ### 3. Key Electronic Components & Features #### A. TwistPin Contact System The heart of the M2MS series is the **TwistPin** contact. Unlike stamped contacts, these are made of a bundle of wires helically wound around a core. * **Benefit:** Provides 7 points of contact between the pin and socket. * **Result:** Maintains electrical continuity under extreme vibration and shock. #### B. Shell Materials and Shielding The body is typically machined from **Aluminum Alloy** or **Stainless Steel**. * **EMI/RFI Protection:** The metal shell acts as a Faraday cage, preventing electromagnetic interference from disrupting signal integrity. * **Plating:** Common finishes include Electroless Nickel or Cadmium (though "-R" models usually utilize Nickel or Zinc-Nickel for RoHS compliance). #### C. Insulators The internal inserts holding the pins are usually made of **Liquid Crystal Polymer (LCP)** or **Polyphenylene Sulfide (PPS)**. These materials offer: * High dielectric strength. * Low outgassing (critical for space and vacuum applications). --- ### 4. Common Applications Due to their ruggedized nature, these parts are used in: * **Aerospace:** Satellite avionics and flight control systems. * **Medical:** High-end diagnostic imaging and portable surgical tools. * **Military:** Man-portable radios and missile guidance systems. * **Downhole Drilling:** High-temperature, high-vibration sensor arrays. ---