The **DFE201612E-R47M** is a high-performance, miniature power inductor manufactured by **Murata Electronics**. It is designed using metal alloy powder technology, making it ideal for compact power management circuits in smartphones and portable electronics. --- ## 1. Technical Specifications The following table summarizes the key electrical and physical characteristics: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 21 mΩ (Max: 26 mΩ) | | **Rated Current (Isat)** | 4.8 A (Based on Inductance change) | | **Rated Current (Itemp)** | 3.8 A (Based on Temperature rise) | | **Operating Temperature** | -40°C to +125°C | | **Size Code (Metric)** | 2016 (2.0 x 1.6 mm) | | **Height (Max)** | 1.2 mm | --- ## 2. Structural Composition The "DFE" series utilizes specific construction techniques that distinguish it from standard ferrite inductors: ### A. Metal Alloy Core Unlike traditional ferrite cores, this part uses a **metal iron powder** core. * **Advantage:** It offers a "soft saturation" characteristic, meaning the inductance drops gradually as current increases rather than crashing abruptly. ### B. Magnetic Shielding The device is magnetically shielded. This is achieved by molding the metal powder around the coil, which minimizes Electromagnetic Interference (EMI) with surrounding components—critical for dense PCB layouts. --- ## 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **DFE** | Series name (Metal Alloy Inductor) | | **2016** | Dimensions (2.0mm x 1.6mm) | | **12** | Maximum height (1.2mm) | | **E** | Specific internal characteristic code | | **R47** | Inductance value (R47 = 0.47 µH) | | **M** | Tolerance (M = ±20%) | --- ## 4. Common Applications Due to its high current handling and small footprint, the DFE201612E-R47M is typically found in: * **DC-DC Converters:** Used in point-of-load (POL) modules. * **Mobile Devices:** Power rails for CPUs and GPUs in smartphones and tablets. * **Wearables:** Devices requiring high efficiency in a restricted Z-height (thickness).