The **LOR3E-R010-F** is a high-precision, low-resistance metal strip chip resistor. It is part of a specialized category of components used primarily for **current sensing** (Ammeter) applications. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the exact specifications of the component: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **LOR** | Series Code | Low Ohmic Resistor (Metal Strip) | | **3E** | Case Size | 2512 Metric (6.4 x 3.2 mm) | | **R010** | Resistance Value | 0.010 Ohms (10 mΩ) | | **F** | Tolerance | ±1% Accuracy | --- ### 2. Technical Specifications These are the typical electrical characteristics for this specific part: * **Resistance:** 10 mΩ (Milliohms) * **Power Rating:** Typically 2W to 3W (depending on the specific manufacturer's thermal rating for the 2512 size). * **Technology:** Metal Strip / Metal Plate (provides superior stability and heat dissipation compared to thick film). * **Temperature Coefficient (TCR):** Usually low (±50ppm/°C to ±100ppm/°C), ensuring accuracy across temperature fluctuations. * **Operating Temperature:** -55°C to +170°C. --- ### 3. Key Features and Benefits 1. **High Power-to-Size Ratio:** The 2512 package is large enough to dissipate significant heat while maintaining a low profile on the PCB. 2. **Low Inductance:** Because it is a solid metal strip rather than a wire-wound component, it has very low parasitic inductance, making it suitable for high-frequency switching applications. 3. **High Pulse Capability:** Metal strip construction handles short-duration high-current surges better than standard resistors. --- ### 4. Common Applications Since this is a current-sensing resistor, it is placed in series with a load to measure current flow by calculating the voltage drop across it ($V = I \times R$). * **Battery Management Systems (BMS):** Monitoring charge and discharge cycles. * **DC-DC Converters:** Providing feedback for current-mode control. * **Motor Control:** Detecting overcurrent conditions or managing torque. * **Power Supplies:** Load monitoring and short-circuit protection. --- ### 5. Footprint (2512 Package) ```text Dimensions (approx): Length: 6.35 mm ± 0.2 Width: 3.18 mm ± 0.2 Height: 0.65 mm ± 0.2 ```