The part number **18AC-AA66-R** corresponds to a specific configuration of a high-performance **Micro-D connector**, typically manufactured by brands like **ITW McMurdo** or similar specialized aerospace/defense component suppliers. These connectors are designed for high-density applications where space and reliability are critical. --- ### 1. Technical Specifications The following table outlines the general characteristics of the 18AC series Micro-D components: | Feature | Specification | | :--- | :--- | | **Series** | 18AC (High-Density Micro-D) | | **Contact Density** | 0.050" (1.27mm) Pitch | | **Housing Material** | Aluminum Alloy (often Nickel or Cadmium plated) | | **Mounting Style** | Right Angle (indicated by the 'R' suffix) | | **Standard Compliance** | Generally meets MIL-DTL-83513 requirements | | **Current Rating** | ~3 Amps per contact | --- ### 2. Part Number Breakdown While manufacturer codes vary slightly, the "18AC-AA66-R" nomenclature usually follows this logic: * **18AC**: The base series (Micro-D metal shell). * **AA**: Often refers to the shell size or the specific insert arrangement (number of pins). * **66**: Typically indicates the specific number of contacts or a specific hardware configuration (e.g., jackposts). * **-R**: Stands for **Right Angle** PCB mount. This means the pins are bent at a 90-degree angle to be soldered into a printed circuit board while the connector face remains parallel to the board edge. --- ### 3. Key Features and Applications These parts are engineered for harsh environments. #### Features: * **Twist Pin Contacts:** Uses a spring-like contact system to maintain electrical continuity under extreme vibration. * **Electromagnetic Interference (EMI) Shielding:** The metal shell provides superior grounding and shielding compared to plastic versions. * **Compact Footprint:** Half the pitch of standard D-sub connectors. #### Common Applications: 1. **Aerospace & Defense:** Avionics, missile guidance systems, and satellite communications. 2. **Medical Electronics:** Portable imaging and diagnostic equipment. 3. **Industrial Robotics:** High-density control systems requiring ruggedized interconnects. --- ### 4. Mounting Diagram Representation ```text [ Connector Face ] | | | | <--- Metal Shell _______|______|_ | [PCB Surface] | | o o o o | <--- Right Angle Pins (-R) |________________| ```