The part number **507T175NF2503** refers to a high-reliability backshell connector accessory manufactured by **Glenair**. This specific component is part of the **Series 507** product line, designed primarily for use with Micro-D (MIL-DTL-83513) connectors. --- ### 1. Technical Specifications Breakdown The part number is an alphanumeric code where each segment defines a specific physical or electrical characteristic: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | 507 | Micro-D Backshell, Top Entry | | **Basic Part No.** | T175 | EMI/RFI Shield Termination (Slot Design) | | **Finish** | NF | Cadmium, Olive Drab over Electroless Nickel | | **Shell Size** | 25 | Fits a 25-pin Micro-D Connector | | **Hardware** | 03 | Female Jackpost (Screwlock) | --- ### 2. Key Functional Features * **EMI/RFI Protection:** The "T" designation indicates a specialized design for terminating cable shields. This ensures that electromagnetic interference is grounded through the backshell, protecting sensitive data signals. * **Material and Coating:** The **NF finish** is a military-standard plating. The Cadmium provides excellent corrosion resistance (500 hours salt spray), while the underlying Nickel provides conductivity for shielding. * **Strain Relief:** The backshell protects the delicate solder or crimp joints of the Micro-D connector from mechanical stress and wire pulling. * **Compact Design:** Specifically engineered for high-density electronic packaging where space is limited, such as aerospace and defense avionics. --- ### 3. Application Use Cases This component is typically found in environments requiring ruggedized interconnects: * **Avionics:** Flight control systems and cockpit instrumentation. * **Defense:** Tactical communication radios and handheld targeting devices. * **Space:** Satellite subsystems where weight and shielding are critical. * **Robotics:** Industrial sensors requiring high-density wiring and vibration resistance. --- ### 4. Technical Comparison: NF vs. M Finish When selecting this part, the finish is the most common variable: | Feature | NF (Cadmium) | M (Electroless Nickel) | | :--- | :--- | :--- | | **Conductivity** | High | Excellent | | **Corrosion Resistance** | Superior (500 hrs) | Moderate (48 hrs) | | **Color** | Olive Drab | Silver/Bright | | **RoHS Compliant** | No (Contains Lead/Cadmium) | Yes |