The **M5RJ84SPJ-R** is a specific part number typically associated with **RJ45 Modular Jacks**. These components are fundamental in networking hardware, serving as the physical interface for Ethernet connections. Below is a detailed breakdown of its electronic and physical specifications. --- ### 1. General Component Specifications The "M5RJ" series generally refers to high-performance modular connectors designed for PCB mounting. | Feature | Specification | | :--- | :--- | | **Connector Type** | RJ45 (8P8C - 8 Positions, 8 Contacts) | | **Orientation** | Right Angle (Side Entry) | | **Mounting Type** | Through-Hole (THT) | | **Shielding** | Fully Shielded (Metal Housing) | | **LED Indicators** | Often includes integrated LEDs (Green/Yellow) | ### 2. Key Electronic Characteristics These parts are designed to handle data transmission while protecting the internal circuitry of the device. * **Contact Resistance:** Usually rated at a maximum of $20\text{m}\Omega$ to $30\text{m}\Omega$ to ensure minimal signal loss. * **Insulation Resistance:** Typically $500\text{M}\Omega$ minimum at 500V DC. * **Current/Voltage Rating:** Rated for approximately 1.5 Amps and 125V AC/DC. * **Dielectric Withstanding Voltage:** Can usually withstand 1000V AC for one minute without breakdown. ### 3. Integrated Magnetics (MagJack) Most modern parts with this naming convention are **MagJacks**. This means the connector is not just a plastic housing but contains internal electronic components: * **Isolation Transformers:** To provide galvanic isolation between the Ethernet cable and the PHY chip. * **Common Mode Chokes:** To filter out Electromagnetic Interference (EMI). * **Terminating Resistors/Capacitors:** To match impedance (usually $75\Omega$) and reduce noise. ### 4. Physical Construction | Component | Material | | :--- | :--- | | **Housing** | Thermoplastic (UL 94V-0 rated) | | **Contacts** | Phosphor Bronze with Gold Plating (usually 6u" to 50u") | | **Shielding** | Copper Alloy with Nickel or Tin plating | --- ### Summary of the "SPJ" Suffix In many manufacturer coding systems: * **S:** Shielded. * **PJ:** Panel Jack or Plug Jack configuration. * **-R:** RoHS Compliant (Lead-free).