The **MPIA4040R2-100-R** is a high-performance, automotive-grade power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the MPIA4040 series, known for its rugged construction and high power density. --- ## 1. Part Number Breakdown Understanding the nomenclature helps identify the component's physical and electrical characteristics: | Code Segment | Meaning | | :--- | :--- | | **MPIA** | Series Name (Metal Process Inductor, Automotive Grade) | | **4040** | Package Size (approx. 4.7mm x 4.3mm) | | **R2** | Revision or Version code | | **100** | Inductance Value: **10 µH** (10 x 10^0) | | **-R** | RoHS Compliant | --- ## 2. Technical Specifications The electrical behavior of this inductor is optimized for DC-DC conversion and filtering. ### Key Electrical Ratings * **Inductance:** 10 µH * **Tolerance:** ±20% * **DC Resistance (DCR):** ~98 mΩ (Typical) * **Saturation Current ($I_{sat}$):** ~3.2 A (The point where inductance drops by 30%) * **RMS Current ($I_{rms}$):** ~2.3 A (Based on a 40°C temperature rise) * **Operating Temperature:** -50°C to +125°C --- ## 3. Core Features & Technology ### Material Composition The part uses a **molded metal powder core**. Unlike traditional ferrite cores, metal powder offers a "soft saturation" characteristic, meaning the inductance decreases gradually rather than dropping sharply when current increases. ### Construction Benefits * **Shielded Design:** The molded construction naturally provides magnetic shielding, reducing Electromagnetic Interference (EMI) with surrounding components. * **AEC-Q200 Qualified:** This indicates the part has passed rigorous stress testing for automotive environments (vibration, thermal shock, etc.). * **Low DCR:** Minimizes power loss due to heat, increasing overall circuit efficiency. --- ## 4. Typical Applications Due to its reliability and size-to-power ratio, it is commonly found in: 1. **Automotive Electronics:** Infotainment systems, Advanced Driver Assistance Systems (ADAS), and LED lighting drivers. 2. **Industrial Power Supplies:** DC-DC converters and Point-of-Load (POL) modules. 3. **Battery Powered Devices:** Where high efficiency and low profile (2.0mm height) are critical. ---