## Detailed Overview: DFE252012PD-R47M The **DFE252012PD-R47M** is a high-performance, metal-alloy fixed inductor manufactured by **Murata Electronics**. It is specifically designed for power circuits where space is limited and efficiency is critical. --- ### 1. Key Specifications | Parameter | Value | Description | | :--- | :--- | :--- | | **Inductance** | 0.47 µH | Nominal inductance value | | **Tolerance** | ±20% | Deviation from nominal value | | **Case Size (Metric)** | 2520 (2.5 x 2.0 mm) | Physical footprint on PCB | | **Height** | 1.2 mm (Max) | Low profile for thin devices | | **Rated Current (Isat)** | 5.2 A | Current at which inductance drops 30% | | **Rated Current (Itemp)**| 4.2 A | Current causing a 40°C temperature rise | | **DC Resistance (DCR)** | 21 mΩ (Max) | Internal resistance of the coil | | **Material** | Metal Alloy | Core material for high saturation | --- ### 2. Breakdown of the Part Number Understanding the nomenclature helps in identifying similar components within the series: * **DFE**: Series Name (Metal Alloy Core Inductor) * **2520**: Dimensions (Length 2.5mm x Width 2.0mm) * **12**: Height (1.2mm maximum) * **PD**: Internal code for specific characteristics/material * **R47**: Inductance Value (R47 = 0.47 microhenries) * **M**: Tolerance (M = ±20%) --- ### 3. Core Technologies & Features #### A. Metal Alloy Construction Unlike traditional ferrite inductors, this part uses a **metal alloy powder**. This provides "soft saturation" characteristics, meaning the inductance decreases gradually as current increases, rather than dropping sharply. #### B. Magnetic Shielding The component is magnetically shielded. This minimizes Electromagnetic Interference (EMI) with surrounding components, which is vital in densely packed smartphone or wearable circuits. #### C. High Current Capability Despite its small 2520 footprint, it handles high saturation currents (up to 5.2A), making it ideal for DC-DC converter applications where high power density is required. --- ### 4. Typical Applications The DFE252012PD-R47M is commonly found in: * **Mobile Devices:** Smartphones, tablets, and wearables. * **Power Modules:** Point-of-Load (PoL) converters. * **Battery Management:** High-efficiency buck/boost converters. * **Consumer Electronics:** Compact cameras and portable gaming consoles. ---