## FR02FC16P-R: Product Overview and Technical Specifications The **FR02FC16P-R** is a high-quality rotary coded switch manufactured by **NKK Switches**. It is part of the FR02 series, characterized by its ultra-thin profile and surface-mount design, making it ideal for compact electronic devices. --- ### 1. Key Technical Specifications | Feature | Specification | |:---|:---| | **Manufacturer** | NKK Switches | | **Logic Type** | Hexadecimal (16 Positions) | | **Output Code** | Real Code | | **Actuator Type** | Flat (Flush) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Contact Rating** | 100mA @ 5V DC (Non-switching); 100mA @ 28V DC (Switching) | | **Terminal Pitch** | 2.54mm (0.100") | | **Operating Temp** | -25°C to +85°C | --- ### 2. Functional Description The FR02FC16P-R acts as a binary-coded decimal/hexadecimal selector. It allows a user to rotate the center dial to one of 16 positions (0-9 and A-F). * **Logic (Real Code):** In "Real Code" configuration, the output pins correspond directly to the binary value of the selected position. For example, if set to position "1", the switch closes the circuit for the least significant bit. * **Ultra-Thin Profile:** With a height of only **2.5mm**, it is designed for applications where PCB vertical space is extremely limited. * **Wiping Contact Mechanism:** The internal contacts use a sliding/wiping motion which helps clear surface oxidation, ensuring high reliability over its 10,000-step operational life. --- ### 3. Pin Configuration and Dimensions The device typically features a standard layout for 16-position switches: * **Common Pins (C):** Usually located on the sides; these are the input pins. * **Data Pins (1, 2, 4, 8):** These represent the binary weights. By combining these outputs, the microcontroller reads the hexadecimal value. #### Dimensions * **Width/Length:** 10.0mm x 10.0mm square. * **Height:** 2.5mm. --- ### 4. Typical Applications 1. **Address Setting:** Used in industrial networking (like RS-485 or CAN bus nodes) to set a unique ID for a device on a bus. 2. **Mode Selection:** Selecting operational modes in embedded systems without needing a digital display or menu system. 3. **Configuration:** Hard-coding hardware preferences on a PCB that rarely need changing but must be physical. ---