The part number **031-5558-RFX** refers to a high-quality BNC (Bayonet Neill–Concelman) connector manufactured by **Amphenol RF**. This specific part is widely used in telecommunications, broadcasting, and test equipment. --- ### 1. Technical Specifications The following table highlights the core electrical and physical characteristics of this component: | Feature | Specification | | :--- | :--- | | **Connector Type** | BNC Jack (Female) | | **Mounting Type** | Panel Mount, Bulkhead | | **Termination Type** | Solder Cup | | **Impedance** | 50 Ohms | | **Frequency Range** | DC to 11 GHz | | **Voltage Rating** | 500 Volts RMS | | **Body Material** | Brass | | **Body Finish** | Nickel | | **Contact Material** | Phosphor Bronze | | **Contact Plating** | Gold | --- ### 2. Key Features and Design * **Bulkhead Mounting:** It is designed to be mounted through a hole in a panel or chassis. It includes a hexagonal nut and a washer to secure it firmly against the surface. * **Solder Cup:** The rear of the connector features a "solder cup" terminal, making it easy to hand-solder a wire directly to the center conductor. * **RF Performance:** Part of the "RFX" line, which is Amphenol's commercial grade series. It provides reliable performance at a lower cost point compared to military-spec versions, without sacrificing significant signal integrity. * **Durability:** The nickel-plated brass body provides excellent corrosion resistance, while the gold-plated contact ensures low contact resistance and prevents oxidation over time. --- ### 3. Common Applications Due to its 50-ohm impedance and panel-mount design, this part is typically found in: 1. **Test Equipment:** Oscilloscopes, signal generators, and spectrum analyzers. 2. **Antenna Systems:** Providing a transition point from an internal circuit to an external antenna cable. 3. **Broadcasting:** Used in video and audio signal routing where a secure, quick-connect bayonet lock is required. 4. **Medical Equipment:** Monitoring devices that require shielded RF paths. --- ### 4. Installation Notes * **D-Hole Cutout:** To prevent the connector from spinning when tightening the nut, it is often installed in a "D-shaped" or "Double-D" hole. * **Isolation:** If the application requires the connector body to be isolated from the chassis ground, non-conductive washers must be used.