The **BRS-Z-R002** is a specialized precision shunt resistor typically utilized in high-current sensing applications. These components are designed to provide highly accurate voltage drops across a known resistance to measure current flow in automotive, industrial, and power management systems. --- ### 1. Technical Specifications Below are the typical electronic characteristics for the BRS-Z series (specifically the R002 variant): | Parameter | Specification | | :--- | :--- | | **Resistance Value** | 2 mΩ (0.002 Ohms) | | **Tolerance** | Usually ±1% or ±5% | | **Power Rating** | 3W to 5W (Depending on mounting/cooling) | | **Temperature Coefficient (TCR)** | < 50 ppm/K (High stability) | | **Material** | Manganese-Copper Alloy (Manganin) or similar | | **Construction** | Electron-beam welded / Metal Plate | --- ### 2. Key Features * **Low Resistance:** The $2\text{ m}\Omega$ value minimizes power loss ($P = I^2R$) while providing a measurable voltage signal. * **High Power Dissipation:** Designed to handle significant current without overheating or changing resistance value. * **Stability:** Low TCR ensures that the resistance remains constant even as the component heats up during operation. * **4-Terminal Design (Kelvin Connection):** Often used in this series to eliminate the resistance of the leads from the measurement, ensuring only the shunt resistance is measured. --- ### 3. Application Use Cases The BRS-Z-R002 is commonly found in the following electronic environments: 1. **Battery Management Systems (BMS):** Monitoring the charge and discharge cycles of lithium-ion battery packs. 2. **Electric Vehicle (EV) Inverters:** Measuring phase currents for motor control. 3. **DC-DC Converters:** Providing feedback loops for current regulation. 4. **Smart Meters:** Monitoring household or industrial electricity consumption. --- ### 4. Typical Connection Diagram In a standard current-sensing circuit, the BRS-Z-R002 is placed in series with the load. ```python # Conceptual Circuit Flow # [Power Source] -> [BRS-Z-R002 (Shunt)] -> [Load] -> [Ground] # | | # V V # [Current Sense Amplifier] # | # V # [Microcontroller / ADC] ```