The **BVT-V-R002-1.0** refers to a high-precision, low-resistance shunt resistor manufactured by **Isabellenhütte**, a leader in precision measurement components. This specific part belongs to the **BVT series**, which is designed for high-current sensing applications. --- ### 1. Component Overview The BVT series utilizes **Manganin®** or **Zeranin®** alloy technology to achieve extremely low resistance values with high stability. These are typically used in automotive and industrial power electronics for current monitoring. ### 2. Technical Specifications The part number can be decoded to understand its specific electronic characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Resistance Value** | 2.0 mΩ (R002) | The ohmic resistance of the shunt. | | **Tolerance** | ±1.0% | The allowable deviation from the nominal resistance. | | **Power Rating** | Up to 10W - 15W | Depending on the mounting and heat dissipation. | | **Temperature Coefficient** | < 30 ppm/K | Ensures accuracy across a wide range of temperatures. | | **Construction** | Electron-Beam Welded | High-strength bond between copper and resistance alloy. | | **Mounting Type** | SMD (Surface Mount) | Large pads designed for high-current PCB traces. | --- ### 3. Key Electronic Features * **Low Inductance:** The flat, massive metal design results in an inductance of less than 3 nH, making it ideal for high-frequency switching environments. * **Thermal EMF:** It exhibits very low thermal electromotive force (EMF) against copper, preventing "offset errors" when the component heats up. * **High Pulse Power:** Due to its massive metal construction, it can handle short-term current surges significantly higher than its continuous rated current. ### 4. Common Applications Due to its 2.0 mΩ resistance and high precision, the BVT-V-R002 is commonly found in: 1. **Battery Management Systems (BMS):** Measuring charge and discharge cycles in electric vehicles (EVs). 2. **Power Inverters:** Monitoring output current in solar or industrial motor drives. 3. **Smart Meters:** Calculating power consumption in high-current grid applications. 4. **DC/DC Converters:** Providing feedback loops for current regulation. --- ### 5. Proper Implementation (Schematic View) To get the most accurate readings, these resistors should be used in a **Kelvin Connection (4-wire)** configuration to eliminate the resistance of the PCB traces from the measurement. ```cpp // Logic for calculating current using Ohm's Law (V = I * R) float voltage_drop = read_adc_voltage(); // Voltage measured across shunt float resistance = 0.002; // 2.0 mOhms float current = voltage_drop / resistance; ```