The **MFC1206-R002FT4** is a high-precision, low-resistance current sense resistor manufactured by **Bourns**. It is part of the MFC series, which utilizes metal foil technology to provide excellent stability and high power handling in a compact surface-mount package. --- ### ## Technical Specifications | Parameter | Specification | Details | | :--- | :--- | :--- | | **Resistance Value** | 0.002 Ohms (2 mΩ) | Ultra-low resistance for minimal power loss | | **Tolerance** | ±1% (F) | High precision for accurate current measurement | | **Package Size** | 1206 (3216 Metric) | 3.2 mm x 1.6 mm footprint | | **Power Rating** | 1.0 Watt | High power density for its size | | **Temperature Coefficient** | ±50 ppm/°C (T4) | Extremely stable across temperature changes | | **Technology** | Metal Foil | Provides better reliability than thick film | | **Operating Temp** | -55°C to +155°C | Industrial grade thermal range | --- ### ### Key Features and Construction 1. **Metal Foil Element:** Unlike standard resistors that use a paste (thick film), this uses a solid metal alloy foil. This results in much lower noise and better thermal stability. 2. **Low Thermal EMF:** The construction minimizes the voltage generated by temperature gradients, which is critical when measuring millivolts across a 2 mΩ resistor. 3. **Inductance:** It features very low self-inductance, making it suitable for high-frequency switching applications like DC-DC converters. --- ### ### Typical Applications * **Current Sensing:** Used as a "shunt" to measure current flow by monitoring the voltage drop across the device ($V = I \times R$). * **Power Management:** Found in laptop power adapters, battery management systems (BMS), and motor controllers. * **Overcurrent Protection:** Used in circuits to detect surges and trigger safety shutdowns. --- ### ### Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **MFC** | Series Name (Metal Foil Chip) | | **1206** | Physical Case Size (1206) | | **R002** | Resistance Value (0.002 $\Omega$) | | **F** | Tolerance (±1%) | | **T4** | Temperature Coefficient (±50 ppm/°C) |