The **031-220G-RFX** is a high-frequency RF (Radio Frequency) connector manufactured by **Amphenol RF**. It belongs to the **BNC** (Bayonet Neill–Concelman) family, specifically designed for high-performance signal transmission in telecommunications and video applications. --- ### 1. Technical Specifications The following table outlines the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Connector Type** | BNC Jack (Female) | | **Impedance** | 75 Ohms | | **Mounting Type** | PCB Mount, Through Hole (Straight) | | **Frequency (Max)** | 4 GHz | | **Body Material** | Brass | | **Body Finish** | Nickel | | **Contact Material** | Phosphor Bronze | | **Contact Plating** | Gold | | **Dielectric Material** | PTFE (Teflon) | --- ### 2. Key Electronic Features * **75 Ohm Impedance:** Unlike standard 50 Ohm BNC connectors used in data/radio, the 75 Ohm version is optimized for **Video and Broadcast** signals. It minimizes signal reflection (return loss) in high-definition video circuits. * **Gold-Plated Contacts:** The center contact is plated in gold to ensure low contact resistance and protection against oxidation over time, maintaining signal integrity. * **Through-Hole Design:** It features solder legs designed to be mounted directly through a Printed Circuit Board (PCB). This provides high mechanical stability compared to surface mount (SMD) alternatives. * **Bayonet Coupling:** Uses a "twist and lock" mechanism which provides a secure, vibration-proof connection that can be quickly connected or disconnected. --- ### 3. Common Applications Due to its high frequency range and 75 Ohm rating, this part is typically found in: 1. **Broadcast Television:** Professional SDI (Serial Digital Interface) equipment. 2. **Video Surveillance:** High-resolution CCTV systems and DVRs. 3. **Test Equipment:** Oscilloscopes and signal generators requiring a 75 Ohm path. 4. **Telecommunications:** Digital signal cross-connect (DSX) systems. --- ### 4. PCB Footprint Example While you should always consult the official datasheet for exact dimensions, the typical layout for this through-hole jack involves: ```text (Top View Layout) [ Signal ] (O) <-- Center Pin Hole (O) (O) <-- Ground/Mechanical Post Holes [Body] (O) (O) ```