The **MPIA4040R3-1R5-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. Technical Specifications The following table summarizes the primary electrical and physical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 1.5 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 18.2 mΩ (Typical) / 21.5 mΩ (Max) | | **Rated Current (Irms)** | 6.3 A | | **Saturation Current (Isat)** | 8.2 A | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4.7mm x 4.06mm x 3.0mm | | **AEC-Q200** | Qualified (Automotive Grade) | --- ## 2. Part Number Breakdown Understanding the nomenclature helps identify the specific features of the inductor: * **MPIA**: Metal Process Inductor, Automotive Grade. * **4040**: Dimensions (approx. 4.0mm x 4.0mm). * **R3**: Refers to the height/version (3.0mm maximum height). * **1R5**: Inductance value (1.5 µH). * **R**: RoHS compliant. --- ## 3. Key Features & Materials * **Molded Construction:** The inductor uses a metal powder core technology. This design provides "soft saturation" characteristics, meaning the inductance drops gradually rather than abruptly when current increases. * **Magnetic Shielding:** The molded body inherently provides magnetic shielding, reducing Electromagnetic Interference (EMI) with neighboring components. * **Ruggedness:** Designed to withstand high vibration and thermal shock, making it ideal for under-the-hood automotive applications. --- ## 4. Common Applications This part is typically used in DC-DC converters and power management modules where space is limited and reliability is critical. 1. **Automotive Systems:** Infotainment, ADAS (Advanced Driver Assistance Systems), and ECU power supplies. 2. **Industrial:** High-density power supplies and battery-powered devices. 3. **Computing:** Voltage Regulator Modules (VRMs) for compact servers or embedded systems. ---