The **MPIA4012V2-R33-R** is a high-performance, automotive-grade miniature power inductor manufactured by **Eaton (formerly Bussmann)**. It belongs to the MPIA4012V2 series, which is characterized by its metal composite construction and high power density. --- ### 1. Technical Specifications The following table highlights the primary electrical and physical characteristics: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.33 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 9.2 mΩ (Typical) / 11.0 mΩ (Max) | | **Rated Current (Irms)** | 10.0 A | | **Saturation Current (Isat)** | 14.5 A | | **Operating Temperature** | -55°C to +125°C | | **Package Size** | 4.0mm x 4.0mm x 1.2mm | | **AEC-Q200 Qualified** | Yes (Grade 1) | --- ### 2. Key Internal Technologies The performance of this part is driven by its material composition and manufacturing process: * **Metal Composite Core:** Unlike traditional ferrite inductors, this part uses a pressed metal powder core. This results in "soft saturation" characteristics, meaning the inductance drops gradually as current increases rather than dropping sharply. * **Magnetic Shielding:** The molded construction provides inherent electromagnetic interference (EMI) shielding, making it ideal for high-density PCB layouts. * **Low Profile:** At only 1.2mm in height, it is designed for space-constrained applications like mobile devices and thin automotive modules. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: 1. **MPIA4012:** Series name and physical dimensions (4.0mm x 4.0mm x 1.2mm). 2. **V2:** Version 2 (Automotive grade / High reliability). 3. **R33:** Inductance value (R33 = 0.33 microhenries). 4. **-R:** RoHS compliant. --- ### 4. Common Applications Due to its low DCR and high saturation current, this inductor is typically used in: * **DC-DC Converters:** Point-of-load (POL) power supplies. * **Automotive Infotainment:** Powering processors and screens. * **ADAS Modules:** Advanced Driver Assistance Systems requiring stable power in harsh environments. * **Battery Management Systems (BMS):** Efficient power regulation.