The **CD08RM0AK-R** is a specific electronic component belonging to the category of **Rotary DIP Switches**. These are used to manually set binary-coded values on a printed circuit board (PCB). --- ## 1. Component Overview The CD series from C&K (now part of Littelfuse) is designed for applications where high reliability and miniature sizing are required. | Feature | Specification | | :--- | :--- | | **Component Type** | Rotary DIP Switch | | **Actuator Style** | Flush Actuator (requires a screwdriver/tool) | | **Number of Positions** | 8 | | **Coding** | Real Code (Binary Coded Octal) | | **Mounting Type** | Through-hole, Right Angle | | **Contact Rating** | 0.4 VA @ 20V AC/DC | --- ## 2. Technical Characteristics ### Mechanical Features * **Right Angle Mounting (`A` suffix):** The "AK" in the part number indicates a right-angle orientation, meaning the dial is accessible from the side of the PCB rather than the top. * **Flush Actuator:** The dial sits level with the housing, preventing accidental changes and requiring a flat-head screwdriver to rotate. * **Sealing:** The "R" suffix often indicates **Tape & Reel** packaging, though in the CD series context, these switches are generally process-sealed to withstand wave soldering and cleaning processes. ### Electrical Features * **Logic Coding:** This is an 8-position switch. In "Real Code" configuration, the output pins represent the binary equivalent of the number selected on the dial (0 through 7). * **Low Voltage/Dry Circuit:** With a rating of 0.4 VA, this part is intended for logic-level switching rather than power handling. --- ## 3. Pinout and Truth Table For an 8-position Real Code switch, there are typically 4 active pins (Common, 1, 2, and 4). | Position | Pin 1 (2^0) | Pin 2 (2^1) | Pin 4 (2^2) | | :--- | :--- | :--- | :--- | | 0 | OFF | OFF | OFF | | 1 | **ON** | OFF | OFF | | 2 | OFF | **ON** | OFF | | 3 | **ON** | **ON** | OFF | | 4 | OFF | OFF | **ON** | | 7 | **ON** | **ON** | **ON** | --- ## 4. Typical Applications * **Address Setting:** Setting unique IDs for nodes on a bus (e.g., RS-485 or CAN bus). * **Configuration:** Selecting operating modes for industrial controllers. * **Peripheral Identification:** Assigning hardware addresses in embedded systems.