The **M5RJ15EPJ-R** is a specific part number typically associated with **RJ45 Modular Jacks** used in networking and telecommunications. These components are critical for providing physical connectivity for Ethernet cables (Cat5, Cat5e, or Cat6). Below is a detailed breakdown of its electronic and physical characteristics. --- ### 1. General Specifications The part is a high-performance connector designed for surface mount or through-hole integration on Printed Circuit Boards (PCBs). | Feature | Description | | :--- | :--- | | **Connector Type** | RJ45 (8P8C - 8 Positions, 8 Contacts) | | **Orientation** | Right Angle (Side Entry) | | **Shielding** | Fully Shielded (Metal Housing) | | **Mounting Type** | PCB Mount (Usually Through-Hole or SMT) | | **LEDs** | Integrated (Typically Green/Yellow for Link/Activity) | --- ### 2. Electronic Components & Features #### A. Integrated Magnetics (MagJack) Most parts in this series are "MagJacks," meaning they contain internal circuitry to handle signal processing. This includes: * **Isolation Transformers:** Protects the equipment from high-voltage surges and DC offsets. * **Common Mode Chokes:** Filters out Electromagnetic Interference (EMI) to ensure signal integrity. #### B. LED Indicators The "EPJ" suffix often denotes the inclusion of specific LED configurations. These are low-power diodes integrated into the front face of the jack, eliminating the need for separate light pipes on the enclosure. #### C. Shielding and Grounding The outer metal shell (shield) is designed to be soldered to the PCB ground plane. This reduces "crosstalk" between adjacent cables and protects the data stream from external radio frequency interference (RFI). --- ### 3. Material Composition * **Housing:** High-temperature thermoplastic (UL 94V-0 rated), capable of withstanding reflow soldering temperatures. * **Contacts:** Phosphor bronze base metal with **Gold Plating** (usually 15u" to 50u") on the contact area to prevent oxidation and ensure low contact resistance. * **Solder Tabs:** Tin-plated for easy soldering to the board. --- ### 4. Technical Pinout (Standard RJ45) | Pin # | Signal (10/100 Base-T) | Description | | :--- | :--- | :--- | | 1 | TX+ | Transmit Data (+) | | 2 | TX- | Transmit Data (-) | | 3 | RX+ | Receive Data (+) | | 6 | RX- | Receive Data (-) | | 4,5,7,8 | Terminated/NC | Used for Power over Ethernet (PoE) or Grounding | ---