The part number **507T175M0901F** refers to a high-performance **Micro-D Backshell** (Connector Accessory) manufactured by **Glenair**. These components are designed to provide strain relief, electromagnetic interference (EMI) shielding, and environmental protection for Micro-D (MIL-DTL-83513) connectors. --- ### Technical Specifications Breakdown The part number is "intelligent," meaning each segment represents a specific feature of the backshell: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | 507 | Micro-D Backshell Series | | **Type** | T | Top Entry (Cable exits from the top/center) | | **Shell Size** | 175 | Compatible with 9-contact Micro-D connectors | | **Material/Finish** | M | Electroless Nickel (Conductive, good for EMI) | | **Entry Size** | 09 | Specific cable entry diameter (approx. 0.281") | | **Hardware** | 01 | Standard Fillister Head Jackscrews | | **Features** | F | Slot for grounding/shielding termination | --- ### Core Functions 1. **EMI/RFI Shielding:** The electroless nickel finish ("M" code) provides a highly conductive surface, allowing the backshell to act as a Faraday cage. This prevents electrical noise from interfering with the signals in the connector. 2. **Strain Relief:** It protects the delicate solder or crimp joints inside the connector by clamping the cable bundle securely, ensuring that pulling on the wire doesn't damage the pins. 3. **Mechanical Protection:** Made from aluminum alloy, it shields the connector interface from physical impact and vibration, common in aerospace and defense environments. ### Typical Applications Due to its ruggedized nature and small form factor, this part is commonly used in: * **Aerospace:** Satellite wiring and cockpit instrumentation. * **Defense:** Man-portable electronics and UAV control systems. * **Medical:** High-end diagnostic equipment requiring shielded data transmission. --- ### Comparison with Alternative Finishes If your application requirements change, the "M" (Electroless Nickel) code is often swapped for others: | Code | Material/Finish | Best Use Case | | :--- | :--- | :--- | | **NF** | Cadmium / Olive Drab | Extreme corrosion resistance (Salt spray) | | **Z1** | Stainless Steel / Passivated | High temperature and chemical resistance | | **MT** | Nickel-PTFE | High lubricity and non-reflective requirements |