The part number **47LR-142R-R** refers to a high-precision, metal film fixed resistor. This component is designed for applications requiring stability, low noise, and tight tolerances. --- ### 1. Technical Specifications Below are the primary technical parameters for the 47LR-142R-R: | Feature | Specification | | :--- | :--- | | **Resistor Type** | Metal Film | | **Resistance Value** | 142 Ohms ($\Omega$) | | **Tolerance** | $\pm 1\%$ (Standard for 'LR' series) | | **Power Rating** | 0.5 Watts (1/2 W) | | **Temperature Coefficient** | $\pm 50 \text{ ppm/}^\circ\text{C}$ | | **Package Type** | Axial Leaded | | **Operating Temperature** | $-55^\circ\text{C}$ to $+155^\circ\text{C}$ | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying similar components within the series: * **47LR**: The series designation. "LR" typically denotes a Low Resistance or Professional Grade Metal Film series (often associated with manufacturers like TE Connectivity/Neohm). * **142R**: The resistance value. The "R" acts as a decimal point or multiplier. In this case, it indicates **142 Ohms**. * **-R**: Typically signifies **RoHS Compliance** (Restriction of Hazardous Substances) or "Taped and Reeled" packaging depending on the specific manufacturer's suffix code. --- ### 3. Key Characteristics * **High Stability:** Metal film technology provides much better stability over time and temperature compared to carbon composition resistors. * **Low Noise:** These resistors have very low current noise, making them ideal for high-fidelity audio circuits and sensitive measurement equipment. * **Precision:** With a 1% tolerance, this part is used where exact voltage division or current limiting is required. --- ### 4. Common Applications * **Signal Processing:** Used in filter circuits where precise resistance values define the cutoff frequency. * **Audio Equipment:** Employed in pre-amplifiers to maintain signal integrity. * **Industrial Controls:** Used in feedback loops for power supplies and motor controllers. * **Test & Measurement:** Found in multimeters and calibration tools. ---