The part number **507-059NF23LR** refers to a high-performance **Micro-D Backshell** (EMI/RFI shielding cover) manufactured by **Glenair**. These components are critical in aerospace, defense, and high-reliability industrial applications for protecting multi-pin connectors. ### Component Specifications Breakdown The part number is "intelligent," meaning each segment defines a specific physical or electrical characteristic: | Segment | Identification | Description | | :--- | :--- | :--- | | **507** | Product Series | Glenair series for Micro-D Backshells. | | **059** | Style | Defines the exit configuration (Side Entry / Low Profile). | | **NF** | Finish/Plating | **Cadmium with Olive Drab Chromate** over Electroless Nickel. | | **23** | Shell Size | Corresponds to a **23-contact** Micro-D connector. | | **L** | Hardware Type | Latching/Jackpost hardware for securing the backshell. | | **R** | Slot/Entry Code | Specifies the specific wire entry or slot dimension. | --- ### Key Technical Features 1. **EMI/RFI Protection:** The primary function of this backshell is to provide a 360-degree conductive path to ground. This prevents Electromagnetic Interference (EMI) from leaking out of the cable or Radio Frequency Interference (RFI) from disrupting the signals inside. 2. **Material Construction:** * **Base Material:** High-grade Aluminum alloy (6061-T6). * **Plating (NF):** Cadmium plating is used for superior corrosion resistance and electrical conductivity, specifically designed to withstand harsh environments (salt spray). 3. **Mechanical Design:** * **Side Entry:** This allows for a more compact cable management system compared to top-entry models, ideal for tight enclosures. * **Strain Relief:** Protects the delicate solder or crimp joints inside the connector from being pulled or damaged. ### Common Applications * **Aerospace:** Avionics suites where space is limited and EMI shielding is non-negotiable. * **Military:** Tactical communication gear and missile guidance systems. * **Space:** Satellite instrumentation (often requires different plating like Electroless Nickel, but the geometry remains the same). --- ### Comparison with Similar Plating Options | Code | Plating Type | Best For | | :--- | :--- | :--- | | **M** | Electroless Nickel | General purpose, non-corrosive environments. | | **NF** | Cadmium / Olive Drab | Military/Marine (High corrosion resistance). | | **ZR** | Black Zinc-Nickel | RoHS compliant alternative to Cadmium. |