The **MPI5451R3-1R5-R** is a high-performance, power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the MPI (Molded Power Inductor) series, which is designed for high-current applications where space and efficiency are critical. --- ### 1. Technical Specifications The following table outlines the primary electrical and physical characteristics of this component: | Parameter | Value | | :--- | :--- | | **Inductance** | 1.5 µH | | **Tolerance** | ±20% | | **Rated Current (Irms)** | 7.3 A (Typical) | | **Saturation Current (Isat)** | 11.5 A | | **DC Resistance (DCR)** | 12.8 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 5.7mm x 5.4mm x 1.2mm (5451 footprint) | | **Shielding** | Shielded (Molded Construction) | --- ### 2. Key Features * **Molded Construction:** The inductor is manufactured using a composite iron powder material. This design provides "soft saturation" (a gradual drop in inductance as current increases) rather than a sharp cutoff. * **Low Profile:** At only 1.2mm in height, it is ideal for thin electronic devices like tablets and ultra-slim laptops. * **Magnetic Shielding:** The molded body inherently reduces Electromagnetic Interference (EMI), protecting nearby sensitive components from noise. * **High Power Density:** It handles significant current relative to its small physical footprint. --- ### 3. Application Use Cases This specific inductor is commonly used in DC-DC converters and voltage regulator modules (VRMs). Typical applications include: 1. **Consumer Electronics:** Smartphones, tablets, and handheld gaming consoles. 2. **Computing:** SSDs, graphics cards, and CPU power stages. 3. **Battery Powered Systems:** Efficient power management in IoT devices. 4. **Distributed Power Systems:** Point-of-Load (POL) converters. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in selecting substitutes: | Segment | Meaning | | :--- | :--- | | **MPI** | Series Name (Molded Power Inductor) | | **5451** | Case Size (Approx. 5.4mm x 5.1mm) | | **R3** | Revision/Construction Type | | **1R5** | Inductance Value (1.5 µH) | | **-R** | RoHS Compliant |