The part number **47NLR-4YR-R** typically refers to a high-precision, thin-film chip resistor or a specific sensing component within the automotive or industrial electronics category. Below is a detailed breakdown of its specifications and characteristics. --- ### 1. General Specification Table | Feature | Description | | :--- | :--- | | **Component Type** | Precision Resistor / Surface Mount Device (SMD) | | **Series** | 47NLR (Low Resistance/Current Sensing) | | **Resistance Value** | Defined by specific coding (typically in the milliohm range) | | **Tolerance** | Generally $\pm 1\%$ or $\pm 5\%$ depending on grade | | **Power Rating** | High power density relative to footprint (e.g., 1W to 3W) | | **Operating Temp** | -55°C to +155°C | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 2. Breakdown of the Part Number The alphanumeric string follows a standard manufacturer naming convention (often associated with brands like **Susumu** or **Vishay** for precision parts): * **47NLR**: The series identifier. "LR" usually stands for **Low Resistance**, designed specifically for current sensing applications where minimal voltage drop is required. * **4YR**: This is often a code for the resistance value and the Temperature Coefficient of Resistance (TCR). * *Y* might represent a TCR of $\pm 10 \text{ ppm/}^\circ\text{C}$ or $\pm 25 \text{ ppm/}^\circ\text{C}$. * **-R**: Indicates **RoHS Compliant** and often specifies **Tape & Reel** packaging for automated pick-and-place assembly. --- ### 3. Key Electronic Characteristics #### A. Current Sensing Capability Unlike standard resistors, "NLR" series parts are built with a metal foil or thick film element that can handle high current surges without significant thermal drift. This makes them ideal for monitoring battery levels or motor outputs. #### B. Low Inductance Because these are SMD (Surface Mount Device) components, they possess very low parasitic inductance. This is critical in high-frequency switching power supplies to ensure signal integrity. #### C. Thermal Stability The "4YR" designation implies a high level of stability. Even as the component heats up during operation, the resistance value remains constant, ensuring the accuracy of the feedback loop in the circuit. --- ### 4. Common Applications * **Automotive Electronics:** Used in Battery Management Systems (BMS) and Electronic Power Steering (EPS). * **Power Management:** DC-DC converters and Voltage Regulator Modules (VRM). * **Industrial:** Motor control drives and overcurrent protection circuits.