The **DFE252012P-R47M** is a high-performance, metal alloy core fixed inductor manufactured by **Murata Electronics**. It is specifically designed for power circuits in compact electronic devices like smartphones, tablets, and wearable technology. --- ### ## Technical Specifications Below is a detailed breakdown of the electronic characteristics of this component: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 21 mΩ (Max) / 17 mΩ (Typ) | | **Rated Current (Isat)** | 5.3 A (Based on Inductance change) | | **Rated Current (Itemp)** | 4.3 A (Based on Temperature rise) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 2.5mm x 2.0mm x 1.2mm (Metric 2520) | | **Material** | Metal Alloy (Magnetic Iron Powder) | --- ### ### Key Features and Construction 1. **Metal Alloy Core:** Unlike traditional ferrite inductors, the DFE series uses a metal alloy powder. This allows for **Soft Saturation** characteristics, meaning the inductance drops gradually as current increases rather than dropping off sharply. 2. **Magnetic Shielding:** The part is magnetically shielded, which minimizes Electromagnetic Interference (EMI) with surrounding components—a critical requirement for high-density PCB layouts. 3. **High Current Capability:** Due to the metallic core, it can handle significantly higher currents relative to its small physical footprint compared to standard multilayer inductors. 4. **Low DCR:** The low DC resistance ensures minimal power loss and high efficiency, extending battery life in portable devices. --- ### ### Typical Applications This part is primarily used in **DC-DC Converters** for power management. Common use cases include: * **Point of Load (POL)** converters in mobile phones. * Voltage Regulator Modules (VRM). * High-efficiency power supplies for CPUs and GPUs in handheld devices. --- ### ### Part Number Breakdown (Deciphering the Code) ```text DFE 2520 12 P - R47 M | | | | | |_ Tolerance (M = ±20%) | | | | |____ Inductance Value (R47 = 0.47 µH) | | | |_________ Product Identification | | |___________ Height (1.2 mm) | |________________ Dimensions (2.5mm x 2.0mm) |_____________________ Series Name (Metal Alloy Inductor) ```