The **FPM3184H-R010DFR** is a high-performance, precision Shunt Resistor (Current Sense Resistor) typically used in power management and battery monitoring applications. It is designed to handle high current loads while maintaining high accuracy and stability. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | Shunt Resistor (Current Sense) | | **Resistance Value** | 0.1 mΩ (0.0001 Ohms) | | **Resistance Tolerance** | ±1% | | **Power Rating** | Up to 15W - 36W (Depending on heat dissipation) | | **Temperature Coefficient (TCR)** | Low (typically <50 ppm/°C) | | **Construction** | Electron-beam welded / Metal alloy | | **Mounting Type** | Surface Mount (SMD / Busbar compatible) | --- ### 2. Major Electronic Characteristics #### A. Ultra-Low Resistance (0.1mΩ) The extremely low resistance of 0.1mΩ allows the component to measure very high currents (hundreds of Amperes) with minimal voltage drop and power loss. This prevents excessive heat generation within the sensing circuit. #### B. High Power Dissipation Unlike standard resistors, the "FPM" series utilizes a robust metal plate construction. It can dissipate significant heat, making it suitable for automotive and industrial power stages where thermal management is critical. #### C. Thermal Stability (TCR) The "R010" in the part number signifies the milliohm value, while the "D" often refers to the tolerance or specific temperature stability rating. Low TCR ensures that the resistance value does not drift significantly as the part heats up under load, maintaining current measurement accuracy. --- ### 3. Common Applications * **Electric Vehicles (EV):** Battery Management Systems (BMS) for monitoring state-of-charge and discharge. * **Power Inverters:** Monitoring current flow in DC-to-AC conversion. * **Industrial Power Supplies:** Overcurrent protection and load monitoring. * **Smart Grid / Energy Storage:** Precision metering for large-scale battery banks. --- ### 4. Comparison: Shunt vs. Hall Effect Sensing | Feature | FPM3184H Shunt | Hall Effect Sensor | | :--- | :--- | :--- | | **Accuracy** | Very High (Direct Measurement) | Moderate (Subject to interference) | | **Cost** | Cost-Effective | More Expensive | | **Isolation** | No (Non-isolated) | Yes (Galvanic Isolation) | | **DC/AC Sensing** | Both | Both | ---