### MPIA4040R2-1R5-R Technical Overview The **MPIA4040R2-1R5-R** is a high-performance, power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the MPIA4040 series, which is specifically designed for automotive applications requiring high current handling in a compact footprint. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 1.5 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 5.8 A (Typical) | | **Saturation Current (Isat)** | 8.0 A (Typical) | | **DC Resistance (DCR)** | 18.2 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4.7mm x 4.31mm x 2.0mm | --- ### 2. Physical Construction & Features * **Molded Construction:** The inductor uses a metal flake powder core material. This molded design provides excellent magnetic shielding, reducing Electromagnetic Interference (EMI) which is critical in sensitive electronic circuits. * **AEC-Q200 Qualified:** It is "Automotive Grade," meaning it has passed rigorous stress tests for mechanical shock, vibration, and thermal cycling. * **Low Profile:** With a maximum height of 2.0mm, it is ideal for thin electronic assemblies. * **Soft Saturation:** Unlike traditional ferrite inductors, the metal powder core allows for a "soft" saturation curve, meaning the inductance drops gradually as current increases rather than crashing abruptly. --- ### 3. Application Use Cases This component is typically found in **DC-DC Converters** and **Voltage Regulator Modules (VRMs)**. Specific applications include: 1. **Automotive Systems:** Infotainment units, Advanced Driver Assistance Systems (ADAS), and body electronics. 2. **Industrial IoT:** Compact power supplies for sensors and gateways. 3. **Computing:** Point-of-Load (PoL) converters for high-speed processors where space is limited. --- ### 4. Part Number Breakdown The part number follows a specific nomenclature: * **MPIA:** Series Name (Molded Power Inductor - Automotive). * **4040:** Footprint dimensions (approx. 4.0mm x 4.0mm). * **R2:** Revision or process code. * **1R5:** Inductance value (1.5 microhenries). * **-R:** RoHS compliant. ---