The term **A-RJ45KS** typically refers to a **Keystone Jack**—a female connector used in data communications, specifically for Ethernet networking. These components are designed to be snapped into wall plates, patch panels, or surface-mount boxes. --- ### 1. Component Overview The RJ45 Keystone Jack is the termination point for horizontal network cabling (Cat5e, Cat6, or Cat6A). It allows a male RJ45 patch cord to connect the end-user device to the building's network infrastructure. | Feature | Description | | :--- | :--- | | **Connector Type** | RJ45 (8P8C - 8 Positions, 8 Contacts) | | **Form Factor** | Keystone (Standardized 14.5mm x 16.0mm port) | | **Termination Type** | IDC (Insulation Displacement Connector) | | **Shielding** | Available in UTP (Unshielded) or STP (Shielded) | --- ### 2. Internal Electronic Structure While it appears to be a simple plastic housing, the internal electronics ensure signal integrity and high-speed data transmission: * **Gold-Plated Contacts:** The 8 pins inside the jack are usually plated with 50 micro-inches of gold to prevent corrosion and ensure low contact resistance. * **IDC Towers:** On the rear, there are "V-shaped" metal blades. When a wire is pressed down (punched), the blade cuts the insulation and creates a gas-tight connection with the copper conductor. * **PCB (Printed Circuit Board):** High-quality jacks (Cat6 and above) contain a small internal PCB to compensate for **Crosstalk (NEXT)** and return loss, ensuring the signal meets frequency requirements (e.g., 250MHz for Cat6). --- ### 3. Wiring Standards Electronic technicians must follow specific color-coding schemes when terminating these parts to ensure compatibility. | Pin Number | T568A Color | T568B Color (Standard) | | :--- | :--- | :--- | | 1 | White/Green | **White/Orange** | | 2 | Green | **Orange** | | 3 | White/Orange | **White/Green** | | 4 | Blue | **Blue** | | 5 | White/Blue | **White/Blue** | | 6 | Orange | **Green** | | 7 | White/Brown | **White/Brown** | | 8 | Brown | **Brown** | --- ### 4. Technical Specifications * **Current Rating:** 1.5 Amps (supports PoE/PoE+ applications). * **Dielectric Withstand Voltage:** 1000V DC. * **Insulation Resistance:** 500 MΩ minimum. * **Durability:** Typically rated for 750+ insertion cycles.