The **DFE252012F-R47M** is a fixed metal alloy inductor manufactured by Murata Electronics. It is part of the DFE series, specifically designed for power circuits where space is limited and high efficiency is required. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the component: | Parameter | Value | Notes | | :--- | :--- | :--- | | **Inductance** | 0.47 µH | ±20% Tolerance | | **DC Resistance (DCR)** | 18 mΩ (Max) | Very low for high efficiency | | **Rated Current (Isat)** | 5.3 A | Based on inductance change | | **Rated Current (Itemp)** | 4.4 A | Based on temperature rise | | **Case Size (Metric)** | 2520 (2.5mm x 2.0mm) | Ultra-compact footprint | | **Height** | 1.2 mm (Max) | Low profile | | **Core Material** | Metal Alloy | Magnetic powder type | --- ### 2. Breakdown of the Part Number The alphanumeric code follows Murata's specific naming convention: 1. **DFE**: Series Name (Metal alloy core, low profile). 2. **2520**: Dimensions (2.5mm length x 2.0mm width). 3. **12**: Maximum height (1.2mm). 4. **F**: Internal manufacturing code. 5. **R47**: Inductance value (R = decimal point; 0.47 µH). 6. **M**: Tolerance (M = ±20%). --- ### 3. Core Features and Advantages * **Metal Alloy Construction:** 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, which prevents circuit instability. * **High Current Handling:** Due to the magnetic powder density, it can handle significantly higher currents in a smaller package compared to ferrite counterparts. * **Low Magnetic Leakage:** The molded construction minimizes electromagnetic interference (EMI), which is critical in dense PCB layouts. * **AEC-Q200 Qualified:** Generally suitable for automotive applications (though specific datasheets should be checked for the exact grade). --- ### 4. Common Applications This inductor is primarily used in DC-DC converters for power management in portable electronics: * **Smartphones & Tablets:** Ideal for CPU/GPU core power rails. * **SSD Storage:** Used in power stages for high-speed data drives. * **Wearables:** Its low profile (1.2mm) makes it perfect for thin devices. * **IoT Modules:** High efficiency helps extend battery life.