The **MPIA4040R1-R15-R** is a specific surface-mount power inductor manufactured by **Eaton (formerly Coiltronics)**. This component belongs to the MPIA4040 series, which is characterized by its high-current handling and rugged molded construction. --- ### ## Component Specification Breakdown The part number can be decoded to understand the specific properties of the electronic component: | Part Segment | Meaning | Specification Detail | | :--- | :--- | :--- | | **MPIA** | Series Name | Metal Powder Inductor (Automotive Grade) | | **4040** | Package Size | Approx. 4.0mm x 4.0mm footprint | | **R1** | Height Profile | 1.2mm height (approximate) | | **R15** | Inductance Value | 0.15 µH (Microhenries) | | **-R** | RoHS Compliance | Lead-free and RoHS compliant | --- ### ## Technical Characteristics This inductor is engineered for high-performance power conversion applications. * **Inductance:** 0.15 µH (High frequency optimized). * **Current Rating (Irms):** Typically ranges from 10A to 15A depending on temperature rise. * **Saturation Current (Isat):** Very high, usually exceeding 20A, thanks to the metal powder core which allows for "soft saturation." * **DCR (DC Resistance):** Extremely low (mΩ range), which minimizes power loss and heat generation. * **Operating Temperature:** -40°C to +125°C (standard for automotive environments). --- ### ## Construction & Benefits The MPIA4040R1 series utilizes a **molded metal powder** technology. Unlike traditional wire-wound ferrites, this design offers: 1. **Magnetically Shielded:** Low Electromagnetic Interference (EMI) allows for placement near sensitive components. 2. **AEC-Q200 Qualified:** Tested for automotive-grade reliability (stress, vibration, and thermal shock). 3. **High Power Density:** Large current handling capability within a very small footprint (4.0mm²). 4. **Soft Saturation:** The inductance does not drop off abruptly when current increases, providing a more stable performance in fluctuating loads. --- ### ## Common Applications * **Automotive Electronics:** Infotainment systems, ADAS sensors, and ECU power supplies. * **DC-DC Converters:** Point-of-load (POL) modules for processors and FPGAs. * **Battery Powered Devices:** Handheld electronics requiring high efficiency. * **Voltage Regulator Modules (VRM):** High-speed switching power supplies. ---