The part number **48NDR-4RH-R** refers to a specific series of **Rotary DIP Switches** typically manufactured by companies like **Copal Electronics** (Nidec) or similar component specialists. These components are used to set binary-coded values manually on a circuit board. --- ### 1. Technical Specifications Below is a breakdown of the typical technical parameters for this part: | Feature | Specification | | :--- | :--- | | **Switch Type** | Rotary DIP Switch | | **Output Code** | Real Binary Coded Hexadecimal (0-15) | | **Number of Positions** | 16 Positions | | **Actuator Style** | Recessed Arrow (Flush) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Contact Rating** | 100mA @ 5V DC (Switching), 100mA @ 50V DC (Non-switching) | | **Terminal Shape** | Gull-wing (R-Shape) | | **Packaging** | Tape and Reel (indicated by the final -R) | --- ### 2. Part Number Breakdown The suffixing and prefixing of this part follow a standardized nomenclature: * **48N**: Series identifier (usually ultra-miniature or standard 7mm/10mm series). * **D**: DIP format. * **R**: Rotary function. * **4**: Indicates a 16-position (Hexadecimal) code. * **RH**: Refers to the terminal style (Right angle or specific SMD layout) and "Real Code" logic. * **-R**: Indicates **Tape and Reel** packaging for automated pick-and-place assembly. --- ### 3. Functional Logic This switch converts the physical rotation of the dial into a 4-bit binary output. As you turn the dial from 0 to F, different pins are connected to the "Common" pin: | Dial Position | Binary Output (Pins 1, 2, 4, 8) | | :--- | :--- | | **0** | 0000 | | **1** | 0001 | | **8** | 1000 | | **F** | 1111 | --- ### 4. Common Applications * **Address Setting:** Used in industrial automation (RS-485/CAN bus nodes) to give a device a unique ID. * **Configuration:** Selecting operating modes on a PCB without needing a display or software interface. * **Security Systems:** Setting hard-coded zones or channels. ---