### CD08CL1S-K-R: Electronic Component Overview The **CD08CL1S-K-R** is a specific model of a **Rotary Coded Switch**. These components are widely used in industrial electronics, telecommunications, and consumer devices to set binary or hexadecimal parameters manually. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | Rotary Coded Switch | | **Circuit Type** | BCD (Binary Coded Decimal) | | **Number of Positions** | 8 Positions (0 through 7) | | **Actuator Type** | Slotted (requires a screwdriver or tool) | | **Mounting Type** | Surface Mount (SMT/SMD), Gull Wing leads | | **Pitch** | 2.54 mm (Standard) | | **Packaging** | Tape & Reel (indicated by the "-R" suffix) | --- ### 2. Physical and Electrical Characteristics * **Construction:** These switches are usually built with high-temperature plastics to withstand reflow soldering processes. * **Sealing:** The "S" in the part number typically indicates a **sealed construction**, meaning it is protected against flux and cleaning processes during manufacturing. * **Contact Rating:** * Switching: ~25mA, 24V DC. * Non-Switching (Carry): ~100mA, 50V DC. * **Logic Output:** As you rotate the actuator, internal contacts bridge the "Common" pin to different output pins representing the binary values ($2^0, 2^1, 2^2$). --- ### 3. Pinout Logic (BCD 8-Position) In an 8-position BCD switch, there are usually 4 to 6 pins. The relationship between the position and the output pins is as follows: | Position | Binary Value | Output Pins Active (Closed) | | :--- | :--- | :--- | | 0 | 000 | None | | 1 | 001 | 1 | | 2 | 010 | 2 | | 3 | 011 | 1 + 2 | | 4 | 100 | 4 | | 5 | 101 | 4 + 1 | | 6 | 110 | 4 + 2 | | 7 | 111 | 4 + 2 + 1 | --- ### 4. Common Applications 1. **Address Setting:** Used to define the ID of a device on a bus (e.g., RS-485 or CAN bus nodes). 2. **Configuration:** Setting baud rates, operating modes, or frequency channels on a PCB. 3. **Industrial Controls:** Providing a manual interface for technicians to adjust settings without needing a digital display or software interface. --- ### 5. Part Number Breakdown (Generic Industry Standard) * **CD08:** Series name and number of positions (8). * **C:** Complementary or Real Code (usually Real BCD). * **L1:** Actuator height/style (Flush or Flat). * **S:** Sealed (Washable). * **K:** Surface Mount (Gull-wing). * **R:** Tape & Reel packaging. ---