The **LR2010-R02GT1** is a high-power, low-resistance SMT (Surface Mount Technology) shunt resistor. It is primarily used for current sensing applications where precision and heat dissipation are critical. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Welwyn (TT Electronics) | | **Resistance Value** | 20 mΩ ($0.02 \Omega$) | | **Tolerance** | ±2% | | **Power Rating** | 1 Watt | | **Case Code (Inch)** | 2010 | | **Case Code (Metric)** | 5025 | | **Temperature Coefficient** | ±100 ppm/°C | | **Technology** | Metal Alloy / Thick Film | --- ### 2. Physical Characteristics The "2010" designation refers to the physical dimensions of the component. This large footprint allows the part to handle higher wattage compared to standard 0805 or 1206 resistors. * **Length:** 5.00 mm * **Width:** 2.50 mm * **Mounting Type:** Surface Mount (SMD/SMT) --- ### 3. Functional Features * **Low Ohmic Value:** At $20\text{m}\Omega$, it is designed to minimize voltage drop across the component while allowing a circuit to measure current flow. * **Current Sensing:** By measuring the small voltage drop ($V = I \times R$) across this resistor, a microcontroller or operational amplifier can determine the exact current flowing through a branch. * **Thermal Stability:** The metal alloy construction ensures that the resistance remains stable even as the component heats up during operation. --- ### 4. Typical Applications 1. **Battery Management Systems (BMS):** Monitoring charge and discharge cycles in lithium batteries. 2. **DC-DC Converters:** Providing feedback loops for power regulation. 3. **Motor Control:** Detecting overcurrent conditions to prevent motor burnout. 4. **Power Supplies:** Load sensing and regulation in industrial equipment. ---