The **MPI5451R3-2R2-R** is a high-performance, power inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the MPI (Molded Powder Inductor) series, which is specifically designed for high-density power applications. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 13.7 mΩ (Typical) / 16.4 mΩ (Max) | | **Saturation Current ($I_{sat}$)** | 10.0 Amperes | | **RMS Current ($I_{rms}$)** | 8.5 Amperes | | **Operating Temperature** | -40°C to +125°C | | **Dimensions (L x W x H)** | 5.4mm x 5.1mm x 3.0mm | --- ### 2. Key Features * **Rugged Construction:** It uses a molded iron powder core technology which provides excellent magnetic shielding and reduces EMI (Electromagnetic Interference). * **Soft Saturation:** Unlike ferrite inductors that have a sharp drop in inductance when current exceeds limits, this part exhibits "soft saturation," meaning inductance decreases gradually. * **High Power Density:** The compact footprint (5.4 x 5.1mm) allows for high current handling in space-constrained PCB layouts. * **Halogen-Free & RoHS Compliant:** Meets modern environmental safety standards for lead-free soldering. --- ### 3. Part Number Breakdown Understanding the nomenclature helps identify variations: * **MPI:** Series Name (Molded Powder Inductor). * **5451:** Physical dimensions (approx. 5.4mm x 5.1mm). * **R3:** Revision or internal designator for the 3.0mm height profile. * **2R2:** Inductance value (2.2 microhenries). * **R:** RoHS compliant suffix. --- ### 4. Common Applications This inductor is typically found in the following electronic circuits: 1. **DC-DC Converters:** Used as an energy storage element in buck, boost, or buck-boost regulators. 2. **Mobile Electronics:** Powering processors in smartphones, tablets, and handheld devices. 3. **Computing:** Voltage Regulator Modules (VRMs) for laptops and servers. 4. **Battery Powered Systems:** Ideal due to low DCR which improves overall power efficiency. ---