## Analysis of LOR3E-R0075-F Electronic Component The **LOR3E-R0075-F** is a specialized passive component, specifically a **Current Sensing Resistor** (also known as a Shunt Resistor). It is designed to measure current flow by monitoring the voltage drop across its terminals. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this series, here are the primary technical parameters: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Component Type** | Current Sense Resistor | Low-resistance metal strip/foil | | **Resistance Value** | 7.5 mΩ (0.0075 Ω) | Specified by "R0075" | | **Tolerance** | ±1% | Indicated by the suffix "F" | | **Power Rating** | 3 Watts | Indicated by the "3E" designation | | **Construction** | Metal Plate / Metal Element | High stability and heat dissipation | --- ### 2. Breakdown of the Part Number The part number follows a structured coding system used by manufacturers (typically associated with brands like **LIZ Electronics**): * **LOR**: Series code for Low Ohmic Resistors (Metal Strip type). * **3E**: Power rating code, representing **3.0 Watts**. * **R0075**: Resistance value. "R" acts as a decimal point, meaning 0.0075 Ohms (or 7.5 milliohms). * **F**: Tolerance code, representing **±1%**. --- ### 3. Physical & Operational Characteristics * **Material:** These resistors are usually made from a manganese-copper or nickel-chromium alloy to ensure a low Temperature Coefficient of Resistance (TCR). * **Mounting Type:** Surface Mount (SMD). * **Inductance:** These parts are designed to have **ultra-low inductance**, which is critical for accurate current sensing in high-frequency switching circuits. * **Thermal Management:** The 3W power rating is relatively high for a small component, meaning it is designed to withstand significant heat without shifting its resistance value. --- ### 4. Common Applications Due to its low resistance and high precision, the LOR3E-R0075-F is commonly used in: 1. **Battery Management Systems (BMS):** Monitoring charge and discharge cycles in Li-ion packs. 2. **DC-DC Converters:** Providing feedback loops for current regulation. 3. **Motor Controllers:** Detecting over-current conditions to protect the motor. 4. **Power Supplies:** Implementing current limiting and safety shut-off features.