The **LRF2010-R02FT1** is a precision low-resistance chip resistor typically used for current sensing applications. It is manufactured by Welwyn (part of TT Electronics) as part of their LRF series. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Value | | :--- | :--- | | **Resistance** | 0.02 Ω (20 mΩ) | | **Tolerance** | ±1% (F) | | **Power Rating** | 1.0 Watt | | **Package / Case** | 2010 (Imperial) / 5025 (Metric) | | **Temperature Coefficient (TCR)** | ±100 ppm/°C | | **Technology** | Thick Film | | **Operating Temperature** | -55°C to +155°C | --- ### ### Key Features 1. **Low Resistance Value:** At 20mΩ, it is designed to minimize power dissipation while allowing for accurate measurement of current flow through a circuit. 2. **High Power Density:** Despite its small 2010 footprint, it can handle up to 1 Watt of power, making it suitable for compact power electronics. 3. **Current Sensing:** Specifically engineered for "Shunt" applications where the voltage drop across the resistor is measured to determine the current ($I = V/R$). --- ### ### Typical Applications * **Power Management:** DC-DC converters and voltage regulators. * **Battery Monitoring:** Measuring charge and discharge rates in portable electronics. * **Motor Control:** Feedback loops for small to medium-sized DC motors. * **Automotive Systems:** Power distribution and safety sensor circuits. --- ### ### Internal Structure (Simplified) The device consists of a high-purity alumina substrate with a resistive thick film element applied. The terminations are wrap-around, typically featuring a nickel barrier and a tin finish to ensure reliable soldering during the SMT (Surface Mount Technology) process. ```text Structure: [Termination]--[Resistive Element]--[Termination] | | | (Tin) (Thick Film) (Tin) ```