The part number **18AC-AD66-R** typically refers to a high-quality **Modular Jack (RJ45)** connector, often manufactured by companies like **Amphenol** or **Stewart Connector**. These are critical components used in networking hardware to facilitate Ethernet connections. --- ### ## Technical Specifications Below is a breakdown of the typical physical and electrical characteristics for this series of connectors: | Feature | Specification | | :--- | :--- | | **Connector Type** | RJ45 (8P8C) | | **Orientation** | Right Angle (Horizontal) | | **Mounting Type** | Through-Hole (PCB Mount) | | **Shielding** | Shielded (Metal Shell) | | **LEDs** | Integrated (Typically Green/Yellow) | | **Tab Direction** | Tab Up / Tab Down (Varies by sub-model) | | **Performance Category** | Cat5e / Cat6 | --- ### ### Key Components & Materials * **Housing:** High-temperature thermoplastic (UL 94V-0 rated), designed to withstand wave soldering. * **Contacts:** Phosphor bronze base with gold plating (usually 30µ" or 50µ") to ensure low signal loss and corrosion resistance. * **Shielding:** Copper alloy with tin or nickel plating to provide EMI/RFI protection. * **Internal Magnetics (Optional):** Some versions of this series include "MagJack" technology, which integrates transformers and filters directly into the port to save PCB space. --- ### ### Applications These parts are commonly found in the following electronic devices: 1. **Network Switches & Routers:** The primary interface for LAN cables. 2. **Industrial PCs:** Used for robust data communication in factory environments. 3. **Set-Top Boxes:** Providing wired internet connectivity for media streaming. 4. **Security Cameras (IP):** Delivering power (PoE) and data through a single port. --- ### ### Deciphering the Part Number (General Logic) While naming conventions vary slightly by manufacturer, the suffix **-R** almost always indicates **RoHS Compliance**, meaning the part is free from lead and other hazardous substances.