The **M5RJ15SPJ-R** is a specific electronic component, typically categorized as a high-performance **Modular Jack (RJ45)** connector. These parts are fundamental in networking hardware, providing the physical interface for Ethernet connections. Below is a detailed breakdown of its electronic and mechanical specifications. --- ## 1. Component Overview The M5RJ15SPJ-R is a shielded, right-angle, surface-mount (or through-hole depending on specific footprint variants) RJ45 connector. It is often designed for industrial or high-reliability telecommunications equipment. ### Key Specifications Table | Feature | Description | | :--- | :--- | | **Connector Type** | RJ45 (8P8C - 8 Positions, 8 Contacts) | | **Orientation** | Right Angle (Side Entry) | | **Shielding** | Fully Shielded (Metal Tab/Shell) | | **Mounting Type** | PCB Mount (Usually with solder pegs) | | **LED Integration** | Typically features integrated LEDs (Green/Yellow) | | **Performance Category** | Cat5e / Cat6 Compatible | --- ## 2. Electronic Characteristics To ensure signal integrity and protection for the connected ICs (like an Ethernet PHY), this component includes several critical electronic features: ### A. Integrated Magnetics (MagJack) While some RJ45s are "passive," the **M5RJ** series often includes internal transformers and "Common Mode Chokes." * **Isolation:** Provides 1500Vrms isolation between the cable and the PHY chip. * **EMI Suppression:** Reduces electromagnetic interference to meet FCC/CE requirements. ### B. Contact Resistance & Rating * **Current Rating:** Typically 1.5 Amps per contact. * **Voltage Rating:** 125 VAC max. * **Contact Resistance:** $\le 30 m\Omega$ to ensure minimal signal loss. ### C. LED Circuitry The "SPJ" suffix often denotes the inclusion of status LEDs. * **Forward Voltage:** ~2.1V for Green, ~2.2V for Yellow. * **Configuration:** Usually requires external current-limiting resistors on the PCB. --- ## 3. Physical & Material Properties The durability of the part is defined by its construction: * **Housing:** High-temperature thermoplastic (UL94V-0 rated), suitable for reflow soldering. * **Shielding:** Copper alloy with Nickel plating to prevent corrosion and provide a path to ground. * **Gold Plating:** The internal pins usually have **30µ" to 50µ" gold plating** to prevent oxidation over thousands of mating cycles. --- ## 4. Pinout Example (Standard) ```text Pin 1: TX+ (Transmit Data Plus) Pin 2: TX- (Transmit Data Minus) Pin 3: RX+ (Receive Data Plus) Pin 6: RX- (Receive Data Minus) Pins 4, 5, 7, 8: Often terminated via "Bob Smith" termination for EMI. ```