The **MPIA4040R3-2R2-R** is a high-performance, automotive-grade power inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the MPIA4040 series, known for its rugged construction and high power density. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of this specific component: | Parameter | Specification | |:---|:---| | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 27.5 mΩ (Typical) / 33 mΩ (Max) | | **Isat (Saturation Current)** | 5.2 Amperes (30% drop in inductance) | | **Irms (Heating Current)** | 4.6 Amperes (40°C temperature rise) | | **Operating Temperature** | -50°C to +125°C | | **Package Size** | 4.0mm x 4.0mm x 3.0mm (4040 footprint) | --- ### 2. Physical & Material Features * **Construction:** It uses a metal powder core material. This molded construction provides excellent magnetic shielding, reducing Electromagnetic Interference (EMI) with surrounding components. * **AEC-Q200 Qualified:** This indicates the part has passed rigorous stress tests for the automotive industry, ensuring high reliability under mechanical shock, vibration, and thermal cycling. * **Low Buzz Noise:** The molded design minimizes the physical movement of the internal coil, which significantly reduces audible noise (buzzing) during operation. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: 1. **MPIA:** Product Series (Metal Powder Inductor, Automotive). 2. **4040:** Physical size (approx. 4.75mm x 4.06mm). 3. **R3:** 3.0mm maximum height. 4. **2R2:** Inductance value (2.2 µH). 5. **-R:** RoHS compliant. --- ### 4. Common Applications Due to its high current handling and small footprint, the MPIA4040R3-2R2-R is typically found in: * **Automotive Electronics:** Infotainment systems, ADAS (Advanced Driver Assistance Systems), and LED lighting. * **Power Conversion:** DC-DC converters, Buck/Boost regulators, and Point-of-Load (PoL) modules. * **Industrial:** High-density power supplies for sensors and control units.