Based on the specific part number provided, the **RTE1012-R-45** refers to a high-precision rotary encoder (often categorized under rotary switches or coded switches), commonly manufactured by brands like **C&K (now part of Littelfuse)**. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | Rotary Coded Switch | | **Output Code** | BCD (Binary Coded Decimal) | | **Number of Positions** | 10 Positions (0-9) | | **Actuator Style** | Flush screwdriver slot or shaft (model dependent) | | **Mounting Type** | Through-hole (PCB) | | **Contact Rating** | 100 mA @ 30 VDC (Switching) / 0.5A (Carry) | | **Orientation** | Vertical / Top Actuated | --- ### 2. Pinout and Electronic Logic The "BCD" output means the switch converts the physical position of the dial into a 4-bit binary signal. This allows a microcontroller to read 10 different states using only 4 input pins (plus a common ground). #### BCD Truth Table (Example) | Position | Pin 1 ($2^0$) | Pin 2 ($2^1$) | Pin 4 ($2^2$) | Pin 8 ($2^3$) | | :--- | :--- | :--- | :--- | :--- | | **0** | Low | Low | Low | Low | | **1** | High | Low | Low | Low | | **2** | Low | High | Low | Low | | **...** | ... | ... | ... | ... | | **9** | High | Low | Low | High | --- ### 3. Part Number Breakdown The nomenclature for the RTE series typically follows this logic: 1. **RTE10**: Series identifier (RTE series, 10 positions). 2. **1**: Termination style (usually PC terminals/Through-hole). 3. **2**: Actuator type (often refers to a specific knob or recessed slot). 4. **-R**: Lead-free / RoHS compliant. 5. **-45**: Specific packaging or minor mechanical variation (such as gold-plated contacts or specific torque). --- ### 4. Typical Applications * **Address Setting:** Used on industrial BUS systems (like RS-485 or CAN) to set a unique ID for a device. * **Configuration:** Selecting modes on a PCB without needing a digital interface/screen. * **Industrial Controls:** Setting timers, limits, or channels in rugged environments. ---