The **WJFT2-H22-R** is a specific model of an **Ethernet Connector (RJ45)**, typically integrated with internal magnetics. These components are commonly referred to as "MagJack" connectors. They are used to provide the physical interface for network connections while handling signal conditioning and isolation. --- ## 1. Technical Specifications Below is a breakdown of the key electronic and physical characteristics of this part: | Parameter | Specification | | :--- | :--- | | **Component Type** | RJ45 Connector with Integrated Magnetics | | **Port Configuration** | Single Port (1x1) | | **Data Rate** | 10/100/1000 Base-T (Gigabit Ethernet) | | **Orientation** | Right Angle / Horizontal (Tab Down) | | **LED Configuration** | Typically Green/Yellow (Status Indicators) | | **Shielding** | EMI Metal Shielding with EMI Fingers | | **Isolation Voltage** | 1500 Vrms (Minimum) | --- ## 2. Integrated Electronic Components Inside the metal housing of the WJFT2-H22-R, several discrete electronic parts are miniaturized and integrated onto a small PCB: ### A. Isolation Transformers * **Purpose:** Provides galvanic isolation between the network cable and the PHY (Physical Layer) chip. * **Function:** Protects the sensitive circuitry of the device from high-voltage spikes on the Ethernet line. ### B. Common Mode Chokes * **Purpose:** Noise suppression. * **Function:** Filters out electromagnetic interference (EMI) that could corrupt data signals or cause the device to fail regulatory emissions tests. ### C. Terminating Resistors (Bob Smith Termination) * **Purpose:** Impedance matching. * **Function:** Typically uses 75-ohm resistors connected to a high-voltage capacitor to reduce common-mode noise and match the cable's characteristic impedance. ### D. Status LEDs * **Purpose:** Visual diagnostics. * **Function:** Directly integrated into the front face to show "Link" (connection established) and "Activity" (data transmission). --- ## 3. Pinout and Connection The part features two sets of pins: 1. **Solder Pins (Back/Bottom):** These connect to the host PCB. They include pins for the differential pairs, LED anodes/cathodes, and the shield ground. 2. **RJ45 Contact Pins (Front):** The standard 8-position gold-plated contacts that interface with the Ethernet cable. ### Schematic Symbols In a circuit diagram, this part is represented as a combination of a standard RJ45 jack and a transformer bridge, often requiring a specific footprint on the PCB to accommodate the shield tabs. ---