The **FJFT2-66-R** is a specific electronic component belonging to the category of **High-Density Modular Connectors**, specifically an **RJ45 Jack (8P8C)** with integrated magnetics. This part is commonly manufactured by companies like **Abracon (formerly Foxconn)**. --- ### 1. General Specifications The FJFT2-66-R is a "MagJack" or integrated connector, meaning it combines a standard physical interface with internal filtering circuitry. | Feature | Specification | | :--- | :--- | | **Connector Type** | RJ45 (8P8C) | | **Orientation** | Right Angle (Horizontal) | | **Port Configuration** | Single Port (1x1) | | **Mounting Type** | Through-Hole (THT) | | **Ethernet Speed** | 10/100 Base-T (Fast Ethernet) | | **Shielding** | Fully Shielded with EMI Tabs | | **LEDs** | Dual Integrated LEDs (Standard colors: Green/Yellow) | --- ### 2. Internal Electronic Components Unlike a standard passive RJ45, the "Integrated Magnetics" inside the FJFT2-66-R include: * **Isolation Transformers:** Provides 1500Vrms isolation between the cable side and the PHY (Physical Layer) side to protect the circuit from surges. * **Common Mode Chokes:** Filters out electromagnetic interference (EMI) and noise from the differential signals. * **Bob Smith Termination:** A resistor/capacitor network used to reduce common-mode noise and improve signal integrity. * **Decoupling Capacitors:** High-voltage capacitors (usually 1000pF / 2kV) to handle static discharge. --- ### 3. Pinout and Interface The component typically features two sets of pins: 1. **Signal Pins (Rear):** Connects to the Ethernet Transceiver (PHY) on the PCB. 2. **LED Pins:** Separate pins to control the status lights (link/activity). 3. **Shield Tabs:** Connected to the chassis ground to prevent EMI radiation. --- ### 4. Key Applications Because of its integrated nature, this part is ideal for space-constrained designs: * **Networking Hardware:** Routers, switches, and hubs. * **Industrial Automation:** PLCs and industrial PCs. * **IoT Gateways:** Devices requiring wired Ethernet connectivity. * **Set-Top Boxes:** Media players and smart TV interfaces. --- ### 5. Part Number Breakdown (Typical) * **FJ:** Brand Prefix (Foxconn/Abracon). * **FT2:** Series designation (10/100 Base-T). * **66:** Dimensional/Body code. * **R:** RoHS compliant. ---