The **MPIA4040R3-R22-R** is a high-performance, automotive-grade miniature power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the MPIA4040 series, known for its high current handling and rugged construction. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the specific characteristics of the component: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | **MPIA4040** | Metal Process Inductor, Automotive Grade (4.7 x 4.3 mm footprint) | | **Version** | **R3** | Revision 3 (Improved efficiency/materials) | | **Inductance** | **-R22** | 0.22 microhenries (µH) | | **Compliance** | **-R** | RoHS Compliant | --- ### 2. Key Technical Specifications Below are the primary electrical and physical parameters for this specific part: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.22 µH ± 20% | | **Rated Current ($I_{rms}$)** | ~14.5 Amperes (Temperature rise base) | | **Saturation Current ($I_{sat}$)** | ~22.0 Amperes (30% drop in inductance) | | **DC Resistance (DCR)** | ~3.1 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4040 (4.7mm x 4.3mm x 2.0mm max height) | --- ### 3. Core Features & Technology * **Molded Construction:** The inductor uses a metal powder core technology. This provides a "soft saturation" characteristic, meaning the inductance drops gradually as current increases rather than crashing abruptly. * **AEC-Q200 Qualified:** It is tested for automotive reliability, making it resistant to high vibration, thermal shock, and moisture. * **Shielded Design:** Its magnetic shielding reduces Electromagnetic Interference (EMI), which is critical in dense PCB layouts. * **Low DCR:** The very low DC resistance ensures high efficiency and minimal heat generation during high-current operation. --- ### 4. Common Applications Due to its high current density and low profile, the MPIA4040R3-R22-R is typically used in: 1. **Automotive Infotainment:** Powering processors and displays. 2. **ADAS (Advanced Driver Assistance Systems):** High-speed radar and camera power supplies. 3. **DC-DC Converters:** Voltage regulation modules (VRMs) for laptops and industrial sensors. 4. **Battery Powered Devices:** Where high efficiency is required to extend battery life. ---