The **MPIA4040R2-2R2-R** is a high-performance, power inductor specifically designed for automotive and industrial applications. It belongs to the MPIA4040 series manufactured by **Eaton (formerly Bussmann)**. --- ### 1. Technical Specifications The part number itself follows a specific nomenclature that defines its electrical characteristics: | Parameter | Value | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 35 mΩ (Typical) / 42 mΩ (Max) | | **Isat (Saturation Current)** | 5.5 A | | **Irms (Rated Current)** | 4.0 A | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4.0mm x 4.0mm x 2.0mm | --- ### 2. Key Features * **AEC-Q200 Grade 1 Qualified:** This indicates the component has passed rigorous stress tests for automotive reliability. * **Molded Construction:** The inductor uses a metal powder core technology which provides "soft saturation" characteristics (inductance drops gradually rather than sharply as current increases). * **Shielded Design:** The molded body provides magnetic shielding, which minimizes Electromagnetic Interference (EMI) with surrounding components. * **High Power Density:** Large current handling capability relative to its small 4040 (4.0 x 4.0mm) footprint. --- ### 3. Part Number Breakdown The code **MPIA4040R2-2R2-R** can be decoded as follows: | Segment | Meaning | | :--- | :--- | | **MPIA** | Molded Power Inductor, Automotive Grade | | **4040** | Physical Size (4.0mm x 4.0mm) | | **R2** | Height Dimension (approx. 2.0mm) | | **2R2** | Inductance Value (2.2 microhenries) | | **-R** | RoHS Compliant / Standard Packaging | --- ### 4. Common Applications Due to its ruggedness and current ratings, it is commonly used in: * **Automotive Electronics:** Infotainment systems, LED lighting drivers, and ADAS modules. * **DC-DC Converters:** Point-of-load (POL) converters where high efficiency and low EMI are required. * **Battery Powered Devices:** Handheld industrial tools and sensors. ---