The **MPIA4040R1-100-R** is a high-performance, automotive-grade power inductor manufactured by **Eaton (formerly Bussmann)**. It belongs to the MPIA4040 series, known for its rugged construction and high power density. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the component's key characteristics: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **MPIA** | Series Name | Metal Powder Inductor, Automotive Grade | | **4040** | Package Size | 4.7mm x 4.06mm (Approx.) | | **R1** | Revision/Style | Standard profile/Standard design | | **100** | Inductance Value | **10 µH** (10 followed by 0 zeros) | | **-R** | Compliance | RoHS Compliant | --- ### 2. Key Technical Specifications Below are the typical electrical parameters for this specific 10 µH model: | Parameter | Value | | :--- | :--- | | **Inductance** | 10 µH | | **Tolerance** | ±20% | | **Rated Current (Irms)** | ~2.5 A (typical) | | **Saturation Current (Isat)** | ~3.0 A (typical) | | **DC Resistance (DCR)** | ~114 mΩ (maximum) | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetically Shielded | --- ### 3. Core Features & Construction * **Metal Powder Core:** The inductor uses a molded metal powder construction. This provides "soft saturation" characteristics, meaning the inductance drops gradually as current increases rather than failing abruptly. * **Magnetic Shielding:** The design minimizes Electro-Magnetic Interference (EMI), which is critical in densely packed automotive or consumer electronics. * **AEC-Q200 Grade 3:** This part is qualified for automotive use, ensuring high reliability under mechanical vibration and thermal cycling. * **Low Core Loss:** Optimized for high-frequency DC-DC converters. --- ### 4. Typical Applications The MPIA4040R1-100-R is commonly used in power management circuits where space is limited and reliability is paramount: 1. **Automotive Infotainment:** Powering screens, GPS, and audio systems. 2. **Advanced Driver Assistance Systems (ADAS):** Powering cameras and radar modules. 3. **DC-DC Converters:** Voltage regulation in buck, boost, or SEPIC topologies. 4. **Industrial IoT:** Compact power supplies for sensors and gateways.