The part number **18JFX-666-R** refers to a high-density, board-to-board connector, typically manufactured by **JST (Japan Solderless Terminals)**. It belongs to the **JFX Series**, which is designed for high-speed signal transmission and compact electronic assemblies. --- ### 1. Technical Specifications The following table outlines the primary physical and electrical characteristics of this component series: | Feature | Specification | | :--- | :--- | | **Series** | JFX Series | | **Connector Type** | Board-to-Board (Plug/Receptacle) | | **Pitch** | 0.6 mm | | **Number of Circuits** | 66 (Indicated by "66" in suffix) | | **Current Rating** | 0.5A AC/DC | | **Voltage Rating** | 50V AC/DC | | **Temperature Range** | -25°C to +85°C | | **Plating** | Gold over Nickel (RoHS compliant) | --- ### 2. Breakdown of the Part Number To understand the specific configuration, the part number can be decoded as follows: * **18**: Typically refers to the stacking height (in millimeters, often representing a specific offset or height code). * **JFX**: The series designation for JST's 0.6mm pitch high-density connectors. * **66**: The total number of positions/pins (66 pins). * **6**: A code for specific packaging or physical orientation features. * **R**: Indicates **RoHS compliance** or **Reel** packaging (Tape & Reel). --- ### 3. Key Features and Applications #### Key Features: * **High-Density Design:** The 0.6mm pitch allows for a high pin count in a very small footprint, ideal for modern mobile electronics. * **Signal Integrity:** Designed to handle high-speed data transfer with minimal cross-talk. * **Secure Mating:** Features a tactile "click" or locking mechanism to ensure a stable connection under vibration. #### Common Applications: 1. **Consumer Electronics:** Smartphones, tablets, and digital cameras. 2. **Computing:** Laptop internal board-to-board connections (e.g., connecting a daughterboard to a motherboard). 3. **Medical Equipment:** Compact handheld diagnostic tools. 4. **Automotive:** Infotainment systems and compact sensor modules. --- ### 4. Footprint and Mounting This part is a **Surface Mount Device (SMD)**. Below is a generic representation of the footprint logic used for these connectors: ```markdown - Solder Pad Width: ~0.35mm - Solder Pad Length: ~1.40mm - Pitch Distance: 0.60mm - Alignment Pins: Usually present on the bottom to ensure correct orientation during pick-and-place. ```