The **MPIA4040R4-220-R** is a high-performance, automotive-grade power inductor manufactured by **Eaton** (formerly Cooper Bussmann). It belongs to the MPIA4040 series, known for its high current handling and compact footprint. --- ### 1. Technical Specifications Below is a breakdown of the key electrical and physical characteristics of this specific component: | Parameter | Specification | |:---|:---| | **Inductance** | 22.0 µH | | **Tolerance** | ±20% | | **DCR (Direct Current Resistance)** | 234 mΩ (Typical) | | **Isat (Saturation Current)** | 2.5 A (Typical) | | **Irms (Heating Current)** | 1.8 A (Typical) | | **Package Size** | 4.7 x 4.31 x 4.0 mm | | **Operating Temperature** | -50°C to +125°C | | **AEC-Q200 Qualified** | Yes (Automotive Grade) | --- ### 2. Part Number Breakdown The alphanumeric code provides specific details about the construction: * **MPIA**: Metal Process Inductor, Automotive Grade. * **4040**: Dimensions (approx. 4.0mm x 4.0mm). * **R4**: Height code (approx. 4.0mm). * **220**: Inductance value (22 x 10^0 = 22.0 µH). * **R**: RoHS compliant. --- ### 3. Key Features & Construction * **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 dropping off sharply. * **Magnetic Shielding:** The molded body inherently acts as a magnetic shield, reducing Electromagnetic Interference (EMI) with surrounding components. * **High Reliability:** Being AEC-Q200 Grade 1 qualified, it is designed to withstand high vibration, thermal shock, and moisture, making it suitable for under-the-hood automotive electronics. --- ### 4. Typical Applications This inductor is commonly used in DC-DC converters and power management circuits for: 1. **Automotive Infotainment:** Screens and navigation systems. 2. **ADAS:** Advanced Driver Assistance Systems (sensors/cameras). 3. **Industrial IoT:** Compact power supplies for rugged sensors. 4. **LED Lighting:** Drivers for automotive or industrial lighting.