The **DFE252012F-R82M** is a high-performance power inductor manufactured by **Murata Electronics**. It belongs to the DFE series, which is specifically designed for high-current, space-constrained applications like smartphones and wearable technology. --- ### 1. Technical Specifications The following table highlights the primary electrical and physical characteristics of the component: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 0.82 µH | Nominal inductance at 1MHz | | **Tolerance** | ±20% | Standard deviation for the series | | **DC Resistance (DCR)** | 24 mΩ (Max) | Resistance of the internal coil | | **Rated Current (Isat)** | 4.4 A | Based on inductance change (-30%) | | **Rated Current (Itemp)** | 3.6 A | Based on temperature rise (+40°C) | | **Size / Dimension** | 2.5mm x 2.0mm | Metric 2520 footprint | | **Height** | 1.2 mm | Low profile for thin devices | | **Construction** | Metal Alloy | Shielded construction | --- ### 2. Key Features * **Metal Alloy Core:** Unlike traditional ferrite inductors, the metal alloy core provides a "soft saturation" characteristic. This means the inductance drops gradually as current increases, rather than dropping sharply. * **Magnetic Shielding:** The molded structure naturally shields the component, reducing Electromagnetic Interference (EMI) with surrounding sensitive circuits. * **High Current Density:** Despite its small 2520 (1008 inch) footprint, it can handle significant current, making it ideal for DC-DC converter output stages. * **Low DC Resistance:** The low DCR helps maintain high efficiency in power conversion and minimizes heat generation. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **DFE** | Series name (Metal Alloy Inductor) | | **252012** | Dimensions (2.5 x 2.0 x 1.2 mm) | | **F** | Characteristic / Material code | | **R82** | Inductance value (R82 = 0.82 µH) | | **M** | Tolerance (M = ±20%) | --- ### 4. Common Applications This part is typically found in: * **Voltage Regulator Modules (VRM):** Powering CPUs or GPUs in mobile devices. * **PMICs:** Integrated into Power Management IC circuits. * **Consumer Electronics:** Smartwatches, tablets, and IoT sensors where PCB real estate is limited.