The part number **47LAC-1D2R-R** refers to a high-precision, multi-turn wirewound potentiometer, typically manufactured by companies like **Sakae** or similar precision component specialists. These components are designed for industrial control systems where high accuracy and reliability are required. --- ### 1. Technical Specifications The part number is a composite code that defines the mechanical and electrical characteristics of the unit. | Feature | Specification Details | | :--- | :--- | | **Series** | 47L (Precision Wirewound Potentiometer) | | **Mechanism** | 10-Turn (3600° rotation) | | **Resistance Range** | Typically ranges from 100Ω to 100kΩ (depending on specific sub-code) | | **Linearity** | Standard ±0.25% to ±0.1% | | **Power Rating** | Approximately 2.0W at 40°C | | **Termination** | Solder lugs or lead wires | | **Rotational Life** | 1,000,000 shaft revolutions | --- ### 2. Part Number Breakdown While manufacturer conventions vary slightly, the code **47LAC-1D2R-R** generally breaks down as follows: * **47L**: Represents the physical size and series (often a 46mm - 47mm diameter housing). * **AC**: Indicates "Anti-Circulation" or specific bearing/bushing mounting configurations. * **1D**: Often refers to the shaft diameter and length (e.g., 6mm or 1/4 inch). * **2R**: Refers to the resistance tolerance or a specific dual-gang (2-unit) configuration. * **-R**: Typically signifies compliance with **RoHS** (Restriction of Hazardous Substances) standards. --- ### 3. Key Features * **Multi-Turn Precision:** Unlike standard volume knobs that turn ~300°, this part requires 10 full rotations to go from minimum to maximum resistance, allowing for extremely fine adjustments. * **Wirewound Element:** Uses a resistive wire wound around a mandrel. This provides excellent temperature stability and high power handling compared to carbon film. * **Robust Construction:** Designed with a metal housing and stainless steel shaft to withstand industrial environments. --- ### 4. Typical Applications These potentiometers are used in precision equipment rather than consumer electronics: 1. **Industrial Machinery:** Setting speed or torque limits on motor drives. 2. **Medical Equipment:** Fine-tuning calibration for imaging or diagnostic tools. 3. **Aerospace/Defense:** Control surfaces or manual override settings in cockpits. 4. **Test & Measurement:** Voltage dividers in laboratory power supplies. ---