The **S-10-R** typically refers to a specific series of **Rotary DIP Switches** manufactured by companies like *Nidec Components (formerly Copal Electronics)* or *E-Switch*. These are compact electromechanical components used to set binary or hexadecimal values on a circuit board. --- ### 1. Key Technical Specifications The "10" in the part number usually indicates a **10-position (BCD)** configuration, while the "R" often denotes the **Real Code** output. | Feature | Specification (Typical) | | :--- | :--- | | **Number of Positions** | 10 (0 through 9) | | **Output Code** | BCD (Binary Coded Decimal) | | **Switching Voltage** | 5V DC to 24V DC | | **Switching Current** | 100mA | | **Contact Resistance** | < 100mΩ | | **Operating Temp** | -25°C to +70°C | --- ### 2. Physical Construction The S-10-R series is designed for durability and space-saving on PCBs. 1. **Rotor:** The top dial that can be turned using a screwdriver or a small coin. 2. **Housing:** Usually made of heat-resistant plastic (PBT) to withstand wave soldering. 3. **Terminals:** Available in **Through-hole** (PC pins) or **Surface Mount** (SMD) configurations. 4. **O-ring Seal:** Many "S" series switches are sealed to allow for board washing after soldering. --- ### 3. Truth Table (BCD Real Code) When you turn the dial to a specific number, the internal pins short to the "Common" pin according to binary logic. | Position | Pin 1 (2⁰) | Pin 2 (2¹) | Pin 4 (2²) | Pin 8 (2³) | | :--- | :---: | :---: | :---: | :---: | | **0** | OFF | OFF | OFF | OFF | | **1** | **ON** | OFF | OFF | OFF | | **2** | OFF | **ON** | OFF | OFF | | **5** | **ON** | OFF | **ON** | OFF | | **9** | **ON** | OFF | OFF | **ON** | --- ### 4. Common Applications * **Address Setting:** Used in industrial networking (Modbus/CANbus) to give a device a unique ID. * **Configuration:** Selecting operating modes on an embedded controller without needing a screen. * **Prototypes:** Quick adjustments to logic parameters during hardware testing. ---