The **ULV5X-R010-KB** is a high-precision, high-power **Current Sense Resistor** (Shunt) manufactured by Isabellenhütte. This component is specifically designed for high-current applications where stability and heat dissipation are critical. --- ### 1. Key Technical Specifications | Parameter | Specification | Details | | :--- | :--- | :--- | | **Resistance Value** | 0.010 $\Omega$ (10 m$\Omega$) | Low resistance to minimize power loss. | | **Tolerance** | $\pm 0.1\%$ (K) | Extremely high precision for accurate measurement. | | **Power Rating** | 5 Watts | Capability to handle high energy loads. | | **Temperature Coefficient** | < 20 ppm/K | High stability across temperature fluctuations. | | **Technology** | Metal Element (Manganin) | Uses specialized alloys for low noise and EMF. | | **Package Style** | Through-hole (4-terminal) | Kelvin configuration for precise sensing. | --- ### 2. Functional Characteristics #### A. 4-Terminal (Kelvin) Connection The "ULV" series typically utilizes a **4-terminal design**. This separates the current path from the voltage sensing path, eliminating the resistance of the lead wires from the measurement. This is essential for a 10 m$\Omega$ resistor, as lead resistance could otherwise cause a 10-20% error. #### B. Manganin Alloy Element The resistive element is made of **Manganin**, which provides: * Excellent long-term stability. * Low internal thermal EMF (reducing errors caused by temperature gradients). * High pulse power handling. #### C. Thermal Management The "5X" in the part number indicates a 5W power rating. The physical construction is optimized to dissipate heat efficiently into the PCB or heatsink, preventing "thermal runaway" or resistance shifts during operation. --- ### 3. Common Applications Due to its high precision and power handling, this part is found in: 1. **Battery Management Systems (BMS):** Monitoring charge/discharge cycles in EVs or industrial UPS. 2. **Power Inverters:** Current control in motor drives and solar converters. 3. **Precision Power Supplies:** Feedback loops for laboratory-grade DC supplies. 4. **Test and Measurement:** Used as a reference shunt in electronic loads. --- ### 4. Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **ULV** | Product Series (Ultra-Low Value/Precision) | | **5** | 5 Watt Power Rating | | **X** | Specific Mechanical/Lead configuration | | **R010** | 0.010 Ohms (10 m$\Omega$) | | **K** | $\pm 0.1\%$ Tolerance | | **B** | Bulk Packaging (Standard) |