The part number **47LAC-2D0G-R** refers to a high-precision, multi-turn wirewound potentiometer, typically manufactured by companies like **Copals (Nidec)** or similar industrial electronic component suppliers. --- ## 1. Component Overview This component is an electromechanical device used to measure angular rotation or to provide a variable resistance in a circuit with high resolution. It is specifically designed for industrial applications requiring fine adjustments. ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Type** | Multi-turn Wirewound Potentiometer | | **Number of Turns** | 10-Turn (Standard for "47" series) | | **Resistance Range** | Typically 2kΩ (indicated by "2D") | | **Tolerance** | ±5% (Standard) | | **Linearity** | ±0.25% to ±0.3% | | **Power Rating** | 2.0 Watts at 40°C | | **Mounting Type** | Panel Mount | --- ## 2. Part Number Breakdown The suffixing nomenclature helps identify the specific physical and electrical characteristics: * **47L**: Represents the series (model family), usually a 10-turn wirewound design. * **AC**: Refers to the physical housing and terminal configuration (often "Bush Mount" or solder lugs). * **2D0**: The resistance code. "2D" translates to **2,000 Ohms (2kΩ)**. * **G**: Represents the linearity tolerance or a specific manufacturing revision. * **R**: Often indicates compliance with **RoHS** (Reduction of Hazardous Substances) standards. --- ## 3. Key Applications Because this is a multi-turn potentiometer, it offers much higher precision than a standard 270-degree knob. It is used in: 1. **Industrial Controls:** Setting motor speeds or voltage thresholds. 2. **Test Equipment:** Calibration tools where minute resistance changes are necessary. 3. **Medical Devices:** Precision positioning and feedback loops. 4. **Audio Equipment:** High-end gain stages or specialized signal processing. --- ## 4. Internal Construction Inside the "47LAC-2D0G-R", a resistive wire is wrapped around a mandrel in a helical shape. A wiper moves along this helix as the shaft is turned, completing 10 full rotations to travel from 0% to 100% of the total resistance. ---