The **MHDPPK9-R** is a high-quality D-Sub connector backshell (hood) manufactured by **MH Connectors**. It is part of the MHDPPK series, specifically designed for 9-pin D-Sub connectors. --- ### ## Technical Specifications | Feature | Specification | | :--- | :--- | | **Series** | MHDPPK | | **Connector Type** | D-Sub Backshell (Hood) | | **Pin Count** | 9-Position (DE-09 / DB-9) | | **Material** | Polyamide (Nylon), UL94V-0 rated | | **Cable Exit** | Top Entry (Straight) | | **Shell Finish** | Black (Plastic) | | **Locking Mechanism** | Jackscrews (4-40 UNC) | | **Cable Diameter Range** | 4.0mm to 11.0mm (via grommets) | --- ### ## Key Components & Features ### 1. The Housing (Shell) The "PPK" in the part number indicates a **Plastic (Polyamide)** construction. Unlike metal-plated hoods, this version is non-conductive, making it ideal for applications where electrical isolation is required between the cable shield and the external environment. ### 2. Strain Relief System The kit includes a multi-diameter internal grommet system. This allows the backshell to securely grip cables of various thicknesses, preventing the internal solder or crimp joints from being pulled apart when the cable is tugged. ### 3. Thumb Screws The MHDPPK9-R comes with **4-40 UNC jackscrews**. These are typically long enough to be easily tightened by hand, ensuring a secure connection to the mating port (like a COM port on a PC). ### 4. Snap-Together Design This series is known for its "Quick-Snap" locking system. The two halves of the shell snap together firmly, reducing assembly time compared to hoods that require multiple small screws to hold the halves together. --- ### ## Applications * **RS-232 Serial Communications:** Custom DB9 cables for industrial machinery. * **Data Networking:** Terminating serial console cables. * **DIY Electronics:** Creating custom interfaces for microcontrollers (Arduino/Raspberry Pi) using legacy ports. * **Prototyping:** Used in environments where a lightweight, durable, and non-conductive housing is preferred over heavy die-cast metal. ---