The **CRE10RRD-P1S-R** is a specific type of electromechanical component, categorized as a **Rotary Coded Switch**. These components are commonly used to set binary or hexadecimal values manually on a printed circuit board (PCB). --- ## 1. Technical Specifications Below are the primary electrical and mechanical specifications for this component: | Feature | Specification | | :--- | :--- | | **Manufacturer** | C&K (Now part of Littelfuse) | | **Switch Type** | Rotary Coded Switch | | **Number of Positions** | 10 (Decimal / BCD) | | **Output Code** | Binary Coded Decimal (BCD) | | **Actuator Type** | Raised Shaft (with slot for screwdriver) | | **Mounting Type** | Through-Hole (Right Angle) | | **Contact Rating** | 100mA @ 50V DC (Non-switching) | | **Operating Force** | 400 gf-cm | --- ## 2. Key Internal Electronic Parts & Materials The functionality of the CRE10RRD-P1S-R relies on several internal physical elements: ### A. The Rotor (Actuator) The "P1S" in the part number indicates a specific actuator style. It is a **raised shaft** that allows a user to turn the switch to one of 10 positions (0 through 9). ### B. The Coding Disk Internally, a conductive disk is etched with a specific pattern. As the rotor turns, the disk completes a circuit between the common pin and the four output pins (1, 2, 4, and 8). * **Example:** If set to "3", pins 1 and 2 are connected to the Common pin ($1+2=3$). ### C. Contact System * **Base Material:** Copper alloy. * **Plating:** Gold over Nickel. Gold plating is critical for low-voltage electronic signals as it prevents oxidation and ensures reliable contact over the component's lifespan. ### D. Housing The body is typically made of high-temperature thermoplastic (PPS or LCP) to withstand wave soldering temperatures. --- ## 3. Terminal Layout (Right Angle) The **"RRD"** designation indicates a **Right Angle** orientation. This means the pins are bent at 90 degrees so the switch can be mounted on the edge of a PCB, allowing the user to adjust the dial from the side of the device enclosure. --- ## 4. Typical Applications * **Address Setting:** Assigning a unique ID to a device on a bus (like RS-485 or CAN). * **Mode Selection:** Selecting between different operating programs in industrial controllers. * **Configuration:** Setting baud rates or timeout intervals on legacy hardware.