The **MPIA4040R1-2R2-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 specific characteristics of this electronic component: | Prefix | Size Code | Revision | Inductance Value | Tolerance | | :--- | :--- | :--- | :--- | :--- | | **MPIA** | **4040** | **R1** | **2R2** | **-R** | | Molded Power Inductor, Automotive | 4.7mm x 4.3mm footprint | Series revision/version | 2.2 Microhenries ($\mu H$) | RoHS Compliant | --- ### 2. Technical Specifications The device is designed for DC-DC converter applications where space is limited and reliability is critical. | Parameter | Specification | | :--- | :--- | | **Inductance** | 2.2 $\mu H$ | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~40 mΩ (Typical) | | **Rated Current (Irms)** | ~4.1 Amperes | | **Saturation Current (Isat)** | ~5.5 Amperes | | **Operating Temperature** | -55°C to +125°C | | **Package Size** | 4040 (Metric: 4743) | --- ### 3. Key Features * **AEC-Q200 Qualified:** Specifically tested for automotive environments, including high vibration and thermal shock. * **Molded Construction:** The inductor is encased in a metal powder material which provides excellent magnetic shielding to reduce Electromagnetic Interference (EMI). * **Soft Saturation:** Unlike ferrite core inductors, the magnetic material allows for a gradual drop in inductance as current increases, preventing sudden circuit failure. * **Low Profile:** The height is typically around 1.2mm to 2.0mm, making it suitable for thin handheld devices or dense PCB layouts. --- ### 4. Typical Applications This component is commonly found in the following electronic circuits: 1. **Automotive Infotainment:** Powering displays and navigation units. 2. **ADAS Systems:** Providing stable voltage for cameras and sensors. 3. **Industrial Computing:** Used in point-of-load (POL) converters. 4. **Battery Powered Devices:** High efficiency ensures longer battery life due to low DCR.