The **FNS-J2-R** is an electronic component primarily classified as a **High-Frequency (RF) Coaxial Connector**, specifically belonging to the **F-Type** family. These connectors are standard in telecommunications, particularly for cable television (CATV), satellite television, and cable modem applications. Below is a detailed breakdown of its electronic specifications and characteristics. ### 1. General Specifications The FNS-J2-R is designed to maintain signal integrity over high-frequency transmissions while providing a secure mechanical interface. | Feature | Description | | :--- | :--- | | **Connector Type** | F-Type (Female Jack) | | **Impedance** | 75 Ohms (Standard for Video/RF) | | **Mounting Type** | PCB Mount (Right Angle / 90-degree) | | **Frequency Range** | Typically 0 to 3 GHz | | **RoHS Compliance** | Yes (R suffix usually denotes Lead-Free/RoHS) | --- ### 2. Key Electronic Parts and Materials The performance of the FNS-J2-R is determined by its internal construction and the materials used for conductivity and insulation. * **Center Contact:** Usually made of phosphor bronze or brass with gold or tin plating. It is designed to grip the center conductor of a male F-pin securely. * **Insulator (Dielectric):** Typically made of **Polyethylene (PE)** or **PTFE (Teflon)**. This part maintains the 75-ohm impedance by providing a specific distance between the center pin and the outer shield. * **Outer Body:** Constructed from Zinc alloy or Brass, often Nickel-plated to prevent oxidation and ensure a low-resistance ground path. * **Solder Pins:** Specifically designed for PCB (Printed Circuit Board) insertion. The "J2" designation often refers to a specific lead configuration or spacing (pitch) for through-hole mounting. --- ### 3. Electrical Characteristics To ensure signal quality in high-speed data or HD video environments, the FNS-J2-R adheres to strict electrical limits: | Parameter | Typical Value | | :--- | :--- | | **Voltage Rating** | 500V RMS | | **Contact Resistance** | < 5.0 mΩ (Center); < 2.5 mΩ (Outer) | | **Insulation Resistance** | > 5000 MΩ | | **Return Loss** | > 20dB @ 1GHz | --- ### 4. Application Scenarios Because of its right-angle PCB mount design, the FNS-J2-R is commonly found in: 1. **Set-Top Boxes (STBs):** Where the cable signal enters the device. 2. **Cable Modems:** For high-speed DOCSIS data transmission. 3. **Wall Plates:** Modular jacks used in home networking. 4. **Signal Splitters:** Active and passive RF distribution hardware.