The part number **47LR-161YR-R** refers to a high-precision, low-resistance metal film resistor, commonly used in automotive, industrial, and high-reliability power management circuits. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | Fixed Resistor / Metal Film | | **Resistance Value** | 160 Ohms (derived from the '161' code) | | **Tolerance** | ±0.1% to ±1% (Series dependent) | | **Mounting Type** | Surface Mount (SMD) / Through-Hole (Variant dependent) | | **Power Rating** | High Power (Typically 0.5W to 1W for this series) | | **Operating Temp** | -55°C to +155°C | --- ### 2. Breakdown of the Part Number While specific manufacturers (like TE Connectivity or Vishay) use internal coding, the standard breakdown for this series is as follows: * **47LR**: The series identifier, typically indicating a **Low Resistance** or **Long-Run** stability metal film technology. * **161**: The resistance code. The first two digits (16) are significant figures, and the third (1) is the multiplier ($10^1$). $16 \times 10 = 160 \Omega$. * **Y**: Typically represents the **Temperature Coefficient of Resistance (TCR)**, often signifying $\pm 15 \text{ppm/}^\circ\text{C}$ or $\pm 25 \text{ppm/}^\circ\text{C}$. * **R**: Generally indicates the packaging type, specifically **Tape & Reel** for automated assembly. --- ### 3. Application Use Cases Due to its high stability and low noise characteristics, this part is ideal for: 1. **Current Sensing:** Precision monitoring of current flow in power supplies. 2. **Feedback Loops:** Used in Op-Amp circuits where precise gain is required. 3. **Automotive Electronics:** Sensors and ECU units requiring AEC-Q200 compliance. 4. **Medical Equipment:** High-accuracy diagnostic tools. --- ### 4. Implementation Example (Voltage Divider) In a precision voltage divider circuit, this resistor might be paired with another high-precision resistor to ensure a stable output voltage regardless of temperature fluctuations. ```python # Simple Python calculation for Voltage Divider v_in = 12.0 # Input Voltage r1 = 160 # 47LR-161YR-R r2 = 1000 # Load Resistor v_out = v_in * (r2 / (r1 + r2)) print(f"Precision Output: {v_out:.4f}V") ```