The **MHDPPK37-R** is a specific type of connector accessory known as a **D-Sub Backshell** (or Hood). It is designed to house and protect a 37-pin D-Subminiature connector, providing strain relief and environmental shielding for cable assemblies. --- ### 1. Technical Specifications The part belongs to the **MHDPPK** series, which is characterized by its "Quick-Snap" locking mechanism and plastic construction. | Feature | Specification | | :--- | :--- | | **Series** | MHDPPK (Plastic) | | **Number of Positions** | 37-Way (Size DC) | | **Material** | Polyamide (Nylon), UL94V-0 rated | | **Cable Entry** | Top Entry (Straight) | | **Locking Type** | Quick-Snap / Thumb-screws | | **Operating Temp** | -55°C to +110°C | | **Color** | Black | --- ### 2. Key Components The MHDPPK37-R kit typically includes the following electronic and mechanical hardware: * **Two-piece Plastic Shell:** High-impact plastic halves that snap together without the need for many small screws, simplifying assembly. * **Strain Relief Grommet Set:** A series of plastic inserts (compression inserts) that accommodate different cable diameters, ensuring the cable doesn't pull out of the solder joints. * **Jack-screws:** Long screws used to secure the finished cable to the mating port (e.g., a computer or industrial machine). * **Blanking Plugs:** Used to fill unused holes to maintain structural integrity. --- ### 3. Usage & Applications This part is commonly used in industrial and data communication environments. 1. **RS-232 / RS-449 Serial Communication:** Standard for legacy data transmission and CNC machinery. 2. **Custom Wire Harnesses:** Providing a professional finish and protection for hand-soldered 37-pin connectors. 3. **Test Equipment:** Housing for cables used in automated test environments where frequent plugging/unplugging occurs. --- ### 4. Part Number Breakdown `MHDPPK` + `37` + `-R` * **MHDPPK:** MH Connectors Plastic Plug Kit (Quick-Snap). * **37:** Denotes the number of pins/sockets (37-way). * **-R:** Indicates RoHS compliance (Restriction of Hazardous Substances).