The **48V-1GV4-R** is a specific part number typically associated with **RJ45 Integrated Connector Modules (ICMs)** or **MagJack** components. These parts are used in networking hardware to combine a physical RJ45 port with the necessary magnetic isolation components. --- ### 1. Key Technical Specifications Based on the nomenclature common for these Ethernet components, here are the primary electrical and physical characteristics: | Parameter | Value/Description | | :--- | :--- | | **Component Type** | RJ45 Integrated Connector (MagJack) | | **Port Configuration** | Single Port (1x1), Tab-Up | | **Ethernet Speed** | 10/100/1000 Base-T (Gigabit Ethernet) | | **Voltage Rating** | 48V (Compatible with Power over Ethernet - PoE) | | **LED Configuration** | Typically Green/Yellow (indicates Link/Activity) | | **Mounting Type** | Through-hole (THT) | | **Shielding** | Metal shield for EMI protection | --- ### 2. Internal Electronic Components The "48V" designation usually implies that the component is designed to handle the electrical stresses of **PoE (Power over Ethernet)**. Inside the metal housing, several electronic sub-components are integrated: * **Isolation Transformers:** Used to match impedance between the cable and the PHY (Physical Layer) chip and to provide 1500Vrms isolation. * **Common Mode Chokes:** These filter out electromagnetic interference (EMI) and noise from the data lines. * **Bob Smith Termination:** A resistor/capacitor network (usually 75Ω resistors and a high-voltage 2kV capacitor) used to terminate unused wire pairs and reduce common-mode noise. * **Integrated LEDs:** Built-in diodes that provide visual status updates without requiring separate PCB holes. --- ### 3. Pinout & Connectivity The part acts as a bridge between the **Media Dependent Interface (MDI)** of an Ethernet controller and the physical Ethernet cable. #### Connection Logic: 1. **Cable Side (RJ45):** 8 pins for Cat5e/Cat6 twisted pair. 2. **PCB Side:** 10 to 12 pins (8 for signal/power, 2 or 4 for LEDs). --- ### 4. Typical Applications * **Network Switches/Routers:** Providing the physical interface for data. * **Industrial Controllers:** Connecting PLCs to a local network. * **IP Cameras:** Utilizing the 48V capability for PoE power delivery. * **Embedded Systems:** Single-board computers requiring a compact Ethernet solution.