The **MPI5451R3-100-R** is a high-performance, high-current power inductor designed for surface-mount applications. It belongs to the MPI5451 series manufactured by **Eaton (formerly Coiltronics)**. ### 1. Technical Specifications The table below highlights the critical electrical and physical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 10.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 71.0 mΩ (Typical) | | **Saturation Current ($I_{sat}$)** | 4.0 Amperes | | **RMS Current ($I_{rms}$)** | 3.3 Amperes | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 5.7mm x 5.4mm x 1.2mm | | **Shielding** | Magnetically Shielded | --- ### 2. Key Features * **Low Profile:** With a maximum height of only 1.2mm, it is ideal for thin consumer electronics like smartphones, tablets, and wearables. * **Rugged Construction:** The "R3" designation often refers to the core material and construction style, optimized for low core losses and high power density. * **Molded Construction:** The metal powder molded core provides excellent saturation characteristics, meaning the inductance stays stable even as current increases. * **Reduced EMI:** Because it is magnetically shielded, it minimizes electromagnetic interference with surrounding components. --- ### 3. Common Applications This inductor is typically used in power management circuits where space is limited and efficiency is critical: * **DC-DC Converters:** Used as the energy storage element in buck (step-down) or boost (step-up) converters. * **Battery Powered Devices:** Ideal for mobile phones, IoT sensors, and handheld medical devices. * **Distributed Power Systems:** Used in point-of-load (POL) modules for laptops and servers. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **MPI5451:** Series Name (Size/Footprint). * **R3:** Revision or specific material/winding technology. * **100:** Inductance Code ($10 \times 10^0 = 10 \mu H$). * **R:** RoHS compliant. ---