The **DFP3012EF-R47M** is a high-performance, surface-mount (SMD) power inductor commonly used in DC-DC converter circuits. It is designed for high-frequency applications where space is limited and efficiency is critical. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical and physical characteristics. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% (indicated by 'M') | | **DC Resistance (DCR)** | ~18-24 mΩ (Typical) | | **Saturation Current (Isat)** | ~5.5A to 6.5A | | **Rated Current (Irms)** | ~4.5A to 5.0A | | **Operating Temperature** | -40°C to +125°C | | **Case Size** | 3.0 x 3.0 x 1.2 mm | --- ### 2. Key Features and Materials * **Metal Alloy Core:** Unlike traditional ferrite inductors, this part usually utilizes a metal powder/alloy core. This provides "soft saturation" characteristics, meaning the inductance drops gradually rather than sharply when current increases. * **Low Profile:** The "12" in the part number indicates a maximum height of 1.2mm, making it ideal for thin electronics like smartphones or tablets. * **Magnetic Shielding:** The structure is shielded to minimize Electromagnetic Interference (EMI), which is vital for high-density PCB layouts. --- ### 3. Application Use Cases This component is typically found in the power management stage of modern electronics: 1. **Buck Converters:** Used as the energy storage element in step-down voltage regulators. 2. **Mobile Devices:** Powering CPUs and GPUs in smartphones where high ripple current handling is needed in a small footprint. 3. **SSD Drives:** Providing stable power rails for NAND flash and controllers. 4. **IoT Modules:** Efficient power conversion for battery-operated wireless sensors. --- ### 4. Part Number Breakdown `DFP` `3012` `EF` `-` `R47` `M` * **DFP:** Series designation (typically Metal Alloy Power Inductor). * **3012:** Dimensions (3.0mm length/width, 1.2mm height). * **EF:** Environmental/Internal coating code (Lead-free/RoHS). * **R47:** Inductance value (R = decimal point; 0.47 microhenries). * **M:** Tolerance code (M = ±20%).