The part number **47LAC-152G-R** refers to a high-precision, multi-turn wirewound potentiometer, typically manufactured by companies like **Bourns** or **Spectrol** (now part of Vishay). These components are used to adjust resistance manually in circuits requiring high resolution and stability. --- ### 1. Part Number Deciphering To understand the electronic characteristics, we can break down the code (based on standard industrial nomenclature for the 4700 series): | Segment | Meaning | Specification | | :--- | :--- | :--- | | **47** | Series Model | Model 4700 (standard 7/8" diameter) | | **L** | Mounting Style | L-Type (typically bushing mount) | | **AC** | Element Type | Wirewound | | **152** | Resistance Code | 15 followed by two zeros = **1,500 $\Omega$ (1.5k $\Omega$)** | | **G** | Tolerance | $\pm$ 2% (Standard is J/5%, G is precision) | | **R** | RoHS Compliance | Lead-free / RoHS compliant | --- ### 2. Key Technical Specifications Based on the standard parameters for this class of potentiometer: * **Turns:** 10-turn (3600° rotation). * **Resistance:** 1.5 k$\Omega$. * **Power Rating:** Typically 2.0 Watts at 70°C. * **Linearity:** Independent linearity of $\pm$ 0.25% (very precise). * **Operating Temperature:** -55°C to +125°C. * **Rotation Life:** Approximately 1,000,000 shaft revolutions. --- ### 3. Internal Construction * **Wirewound Element:** The resistive element consists of a fine resistive wire (often a nickel-chromium alloy) wound around a ceramic or plastic mandrel. This provides excellent thermal stability compared to carbon potentiometers. * **Dual-Bearing Support:** Usually features metal sleeves or ball bearings to ensure smooth rotation over the 10-turn range. * **Wiper Mechanism:** A precious metal wiper tracks along the coil to provide the variable voltage/resistance output. --- ### 4. Common Applications Due to its precision and durability, this part is found in: 1. **Industrial Controls:** Setting motor speeds or temperature setpoints. 2. **Medical Equipment:** Calibrating diagnostic machinery. 3. **Test & Measurement:** Used in lab power supplies for fine-tuning output voltage. 4. **Avionics:** Control surfaces where high reliability is required.