The **CRL0805-FV-R090ELF** is a high-power, low-resistance chip resistor manufactured by **Bourns**. It is specifically designed for current sensing applications where precision and reliability are critical. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Bourns | | **Resistance** | 0.090 Ohms ($90 \text{ m}\Omega$) | | **Tolerance** | $\pm 1\%$ | | **Power Rating** | 0.5 Watts (1/2 W) | | **Package / Case** | 0805 (2012 Metric) | | **Temperature Coefficient** | $\pm 200 \text{ ppm/}^\circ\text{C}$ | | **Technology** | Thick Film | | **Operating Temperature** | $-55^\circ\text{C}$ to $+155^\circ\text{C}$ | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the specific features of this series: * **CRL**: Series name (Low Resistance Chip Resistor). * **0805**: Physical size (0.08 x 0.05 inches). * **FV**: Termination/Type code (Varying by specific manufacturer mounting style). * **R090**: Resistance value ($R$ denotes decimal; $0.090 \Omega$). * **F**: Tolerance code ($F = \pm 1\%$). * **L**: Low-profile or specific plating (usually Tin over Nickel). * **F**: RoHS Compliant (Lead-Free). --- ### 3. Core Applications This part is typically used in circuits that require monitoring current flow by measuring the voltage drop across the resistor ($V = I \times R$). * **Power Management:** DC-DC converters and battery management systems (BMS). * **Overcurrent Protection:** Detecting surge currents to trigger safety shutdowns. * **Motor Control:** Feedback loops for small DC motors. * **Consumer Electronics:** Power bricks and charging circuits for laptops or smartphones. --- ### 4. Advantages 1. **High Power Density:** Provides 0.5W in a small 0805 footprint, which is higher than standard general-purpose 0805 resistors (usually 0.125W). 2. **Low Ohmic Value:** Minimizes power dissipation ($P = I^2 \times R$) while still allowing for accurate signal measurement. 3. **Stability:** The thick film construction provides robust performance against environmental stressors. ---