The **MPI4020V2-100-R** is a high-performance, power inductor manufactured by **Eaton (formerly Bussmann)**. It belongs to the MPI4020 series, which is characterized by its miniature footprint, high current handling capabilities, and rugged construction. --- ### 1. Key Technical Specifications The part number itself reveals specific characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 10.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 148 mΩ (Typical) | | **Rated Current ($I_{rms}$)** | 2.1 A | | **Saturation Current ($I_{sat}$)** | 2.5 A | | **Package Size** | 4.0mm x 4.0mm x 2.1mm | | **Operating Temp** | -40°C to +125°C | --- ### 2. Physical and Material Characteristics The "V2" in the part number indicates an updated version of the series with improved performance or manufacturing standards. * **Construction:** It uses a metal powder core technology. This "molded" construction allows for higher power density and a soft saturation curve compared to traditional ferrite drum cores. * **Shielding:** The component is magnetically shielded, which minimizes Electromagnetic Interference (EMI) with surrounding sensitive components on the PCB. * **Ruggedness:** Designed to handle high vibration and thermal shock, making it suitable for industrial environments. --- ### 3. Application Areas Because of its small size and high efficiency, this inductor is typically found in the following circuits: 1. **DC-DC Converters:** Used as a storage element in Buck (step-down) or Boost (step-up) converters. 2. **Point of Load (POL):** Ideal for providing stable voltage to CPUs, FPGAs, and ASICs in compact devices. 3. **Battery Powered Devices:** Used in handheld electronics where board space is at a premium and power efficiency is critical to battery life. 4. **Distributed Power Systems:** Found in servers and networking equipment for local voltage regulation. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in selecting alternatives: * **MPI:** Series Name (Molded Power Inductor) * **4020:** Dimensions (4.0mm width/length, 2.0mm height) * **V2:** Design version/Generation * **100:** Inductance code ($10 \times 10^0 = 10$ µH) * **R:** RoHS compliant