The **A-RJ45KU-R** is a standard electronic component commonly used in networking hardware. Based on its nomenclature, it refers to a **Right-Angle, Shielded RJ45 Jack (Modular Connector)** designed for PCB (Printed Circuit Board) mounting. Below is a detailed breakdown of its electronic parts and technical specifications. --- ## 1. Physical and Electronic Components | Component | Material / Description | Function | | :--- | :--- | :--- | | **Housing** | Thermoplastic (UL94V-0 rated) | Provides structural integrity and electrical insulation. | | **Contacts** | Phosphor Bronze with Gold Plating | Ensures high conductivity and prevents oxidation at the connection point. | | **Shielding** | Copper Alloy (Nickel plated) | Protects the signal from Electromagnetic Interference (EMI). | | **Solder Pins** | Tin-plated Copper | Allows the connector to be soldered onto a PCB. | --- ## 2. Technical Specifications These connectors are built to comply with Ethernet standards (Cat5e or Cat6 depending on the specific manufacturer variant). ### Electrical Characteristics * **Voltage Rating:** 125 VAC RMS. * **Current Rating:** 1.5 Amperes. * **Contact Resistance:** 30 mΩ Max (initial). * **Insulation Resistance:** 500 MΩ Min @ 500V DC. * **Dielectric Strength:** 1000V AC RMS 50Hz or 60Hz for 1 minute. ### Mechanical Characteristics * **Orientation:** Right-Angle (Side Entry). * **Tab Direction:** Tab-Up or Tab-Down (depending on the specific "KU" sub-series). * **Durability:** Typically rated for 750 mating cycles minimum. --- ## 3. Pinout Configuration For a standard 8P8C (8 Positions, 8 Contacts) RJ45 jack like the A-RJ45KU-R, the typical PCB layout follows this logic: ```markdown Pin 1: TX+ (Transmit Data +) Pin 2: TX- (Transmit Data -) Pin 3: RX+ (Receive Data +) Pin 4: Unused / Bi-directional Pin 5: Unused / Bi-directional Pin 6: RX- (Receive Data -) Pin 7: Unused / Bi-directional Pin 8: Unused / Bi-directional ``` *Note: Shielding pins are usually connected to the chassis ground.* --- ## 4. Common Applications * **Networking Gear:** Routers, Switches, and Hubs. * **Industrial PC:** Embedded motherboards and PLC modules. * **Consumer Electronics:** Smart TVs, gaming consoles, and set-top boxes. ---