### MPI4040R2-6R8-R: Component Overview The **MPI4040R2-6R8-R** is a high-power, high-frequency shielded inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the MPI4040 series, which is specifically designed for high-current applications where space is at a premium. --- ### 1. Technical Specifications The following table highlights the critical electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 6.8 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 3.3 A (Typical) | | **Saturation Current (Isat)** | 4.0 A (Typical) | | **DC Resistance (DCR)** | 62 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4.7mm x 4.31mm x 2.0mm | | **Shielding** | Magnetically Shielded | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying variants within the same family: * **MPI**: Series Name (Molded Power Inductor). * **4040**: Dimensions (approx. 4.0mm x 4.0mm). * **R2**: Revision/Process code (indicates the 2.0mm height profile). * **6R8**: Inductance value (6.8 microhenries). * **-R**: RoHS Compliant. --- ### 3. Key Features and Construction * **Rugged Construction:** These are "molded" inductors, meaning the coil is encapsulated in a metal iron powder core. This design provides excellent protection against mechanical shock and vibration. * **Magnetic Shielding:** The molded construction naturally shields the component, minimizing Electromagnetic Interference (EMI) with surrounding components on the PCB. * **Soft Saturation:** Unlike ferrite core inductors that lose inductance sharply when current limits are exceeded, the MPI series features "soft" saturation, where inductance drops gradually as current increases. * **High Frequency Performance:** Optimized for switching frequencies ranging from 20 kHz up to 5 MHz. --- ### 4. Typical Applications The MPI4040R2-6R8-R is commonly used in the following scenarios: 1. **DC-DC Converters:** Point-of-load (POL) converters for CPUs and GPUs. 2. **Portable Electronics:** Smartphones, tablets, and laptops where a low profile (2mm height) is required. 3. **Battery Powered Systems:** High efficiency is required to extend battery life. 4. **Distributed Power Systems:** Used in industrial and automotive infotainment systems. ---