The **LOR3E-R01-G** is a specific surface-mount electronic component, typically classified as a **Current Sense Resistor**. These components are engineered to measure current flow within a circuit by monitoring the voltage drop across their precise resistance. --- ### 1. Key Technical Specifications Based on the part numbering convention (commonly used by manufacturers like *LIZ Electronics* or *Cyntec*), here are the primary specifications: | Parameter | Value / Description | | :--- | :--- | | **Component Type** | Current Sense Resistor (Shunt) | | **Resistance Value** | 1 mΩ (0.001 Ohms) | | **Tolerance** | ±1% (denoted by the 'F' or 'G' suffix logic) | | **Power Rating** | Typically 3 Watts (Common for the LOR3E series) | | **Package Size** | 2512 (6432 Metric) | | **Technology** | Metal Strip / Metal Plate | --- ### 2. Functional Breakdown #### **A. Metal Plate Technology** Unlike standard thick-film resistors, the LOR3E series uses a **metal alloy plate**. This provides superior thermal stability and a low Temperature Coefficient of Resistance (TCR), ensuring the resistance doesn't change significantly as the part heats up. #### **B. Low Resistance Value (R01)** The "R01" indicates a very low resistance value. This is critical for power management because it minimizes power loss ($P = I^2R$) while still providing a measurable voltage signal for the controller. #### **C. Power Dissipation** The "3E" in the prefix often signifies a high power rating (3W). Because current sense resistors handle the full load of a circuit, they must be able to dissipate heat effectively without failing. --- ### 3. Common Applications These parts are found in power-heavy electronics where monitoring battery life or motor torque is necessary: * **Battery Management Systems (BMS):** Monitoring charge and discharge cycles in Lithium-ion packs. * **DC-DC Converters:** Providing feedback for over-current protection. * **Motor Controllers:** Sensing phase current to control speed and torque. * **Laptop/Mobile Power Rails:** Managing power distribution and efficiency. --- ### 4. Implementation Example In a typical circuit, the LOR3E-R01-G is placed in series with the load. An Operational Amplifier (Op-Amp) or a dedicated Current Sense IC measures the voltage across the resistor. ```python # Simple Ohm's Law calculation for this part resistance = 0.001 # 1 mOhm measured_voltage = 0.050 # 50mV across the resistor current = measured_voltage / resistance print(f"Detected Current: {current} Amps") # Result: 50 Amps ``` ---