The **ND3FC16H-R** is a high-quality, subminiature rotary DIP switch manufactured by **NKK Switches**. It is designed for PCB mounting and is used to manually set binary-coded decimal (BCD) or hexadecimal values in electronic circuits. --- ### ## Technical Specifications The following table summarizes the key electrical and physical characteristics of the ND3FC16H-R: | Parameter | Specification | | :--- | :--- | | **Switch Type** | Rotary DIP Switch | | **Output Code** | Hexadecimal (0-15 / 0-F) | | **Number of Positions** | 16 | | **Actuator Style** | Complementary / Shaft Type (Flat Top) | | **Orientation** | Right Angle (Horizontal) | | **Terminal Type** | PC Pin (Through-Hole) | | **Voltage Rating** | 50V DC (Non-switching) / 5V DC (Switching) | | **Current Rating** | 100mA (Non-switching) / 100mA (Switching) | | **Contact Resistance** | 80 mΩ maximum | | **Operating Temperature** | -25°C to +85°C | --- ### ### Key Features and Design 1. **Compact Footprint**: Being a "subminiature" component, it occupies minimal board space, making it ideal for dense PCB layouts. 2. **Right Angle Orientation**: The "H" in the part number signifies a horizontal (right-angle) mount. This allows the user to adjust the switch from the side of the device casing rather than the top. 3. **Hexadecimal Output**: With 16 positions, it provides a 4-bit output. This is commonly used for addressing, mode selection, or configuration settings. 4. **Sealed Construction**: The series typically features a heat-resistant resin base and a sealed construction to prevent contact contamination during automated soldering and washing processes. 5. **Durability**: It is rated for approximately 20,000 detent operations, ensuring long-term reliability in industrial environments. --- ### ### Common Applications The ND3FC16H-R is frequently found in the following electronic systems: * **Industrial Automation**: Setting Node IDs on a fieldbus or PLC network. * **Telecommunications**: Configuring frequency channels or hardware addresses. * **Security Systems**: Manual override settings or device identification. * **Embedded Systems**: Selecting boot modes or hardware revisions. --- ### ### Pinout Logic (4-Bit Hex) The switch converts the rotary position into a logic signal across 4 pins (Common + 1, 2, 4, 8). ```text Position | Binary (8-4-2-1) | Hex Value -------------------------------------- 0 | 0000 | 0 1 | 0001 | 1 ... | ... | ... 9 | 1001 | 9 10 | 1010 | A 15 | 1111 | F ```