The **ST-10-R-B** is a specific electronic component typically associated with a **Rotary Coded Switch** (often manufactured by Nidec Copal Electronics or similar suppliers). These parts are used to set parameters manually on a circuit board by rotating a dial. --- ### 1. General Specifications The ST-10 series represents subminiature rotary coded switches designed for high-density mounting. | Feature | Specification | | :--- | :--- | | **Code Type** | Real Code (Binary Coded Decimal - BCD) | | **Number of Positions** | 10 (0 through 9) | | **Setting Direction** | Top Setting (Rotated from the top) | | **Terminal Shape** | Gull-wing (SMD - Surface Mount Device) | | **Form Factor** | 4mm Square (Subminiature) | --- ### 2. Breakdown of the Model Name (ST-10-R-B) The alphanumeric code identifies the specific physical and electrical characteristics: * **ST-10**: Series name (4mm square, 10-position rotary switch). * **R**: Refers to the **Coding**. "R" stands for **Real Code** (standard BCD). * **B**: Refers to the **Packaging**. Usually indicates **Bulk** packaging (as opposed to Tape and Reel). --- ### 3. Electrical & Mechanical Characteristics These parts are engineered for durability and precision in industrial environments. * **Contact Rating:** * Switching: DC 5V, 100mA * Non-switching: DC 50V, 100mA * **Contact Resistance:** 100 mΩ maximum. * **Operating Temperature:** -40°C to +85°C. * **Rotational Torque:** 10 mN·m. * **Seal Structure:** Washable (O-ring sealed to withstand soldering and cleaning processes). --- ### 4. Logic Table (Real Code) Since this is a BCD (Binary Coded Decimal) switch, the output pins (1, 2, 4, 8) connect to the Common (C) pin based on the dial position: | Position | 1 | 2 | 4 | 8 | | :---: | :---: | :---: | :---: | :---: | | **0** | | | | | | **1** | ● | | | | | **2** | | ● | | | | **3** | ● | ● | | | | **4** | | | ● | | | **5** | ● | | ● | | | **6** | | ● | ● | | | **7** | ● | ● | ● | | | **8** | | | | ● | | **9** | ● | | | ● | *(● indicates a closed circuit to the Common pin)* --- ### 5. Common Applications * **Address Setting:** Used in networked devices to set a unique ID for a node. * **Mode Selection:** Selecting operational profiles in industrial controllers. * **Configuration:** Adjusting timer settings or hardware thresholds on PCBs where a digital UI is not available.