The **DFE252012P-R33M** is a high-performance, miniature power inductor manufactured by **Murata Electronics**. It belongs to the DFE series, which is specifically designed for high-current applications in compact electronic devices like smartphones, tablets, and wearable technology. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.33 µH | | **Tolerance** | ±20% | | **Rated Current (Isat)** | 5.8 A (Saturation current based on inductance change) | | **Rated Current (Itemp)** | 4.6 A (Temperature rise current) | | **DC Resistance (DCR)** | 18 mΩ (Max) | | **Case Size (Metric)** | 2520 (2.5mm x 2.0mm) | | **Height** | 1.2 mm (Max) | | **Material** | Metal Alloy (Magnetic Iron Powder) | --- ### 2. Breakdown of the Part Number Understanding the nomenclature helps in identifying its physical and electrical characteristics: - **DFE**: Series Name (Metal alloy core, molded type). - **2520**: Dimensions in millimeters ($2.5 \text{ mm} \times 2.0 \text{ mm}$). - **12**: Maximum height ($1.2 \text{ mm}$). - **P**: Internal manufacturing code (Standard type). - **R33**: Inductance value ($R33 = 0.33 \text{ µH}$). - **M**: Tolerance ($M = \pm 20\%$). --- ### 3. Core Features and Construction #### A. Metal Alloy Core Unlike traditional ferrite inductors, this part uses a **metal iron powder core**. This construction allows for: * **Soft Saturation:** The inductance decreases gradually as current increases, rather than dropping sharply. * **Higher Current Density:** It can handle higher currents in a smaller footprint compared to ferrite. #### B. Magnetic Shielding The component is magnetically shielded. This is crucial for high-density PCB layouts as it minimizes electromagnetic interference (EMI) with neighboring sensitive components like CPUs or RF modules. #### C. Low Profile With a height of only 1.2 mm, it is ideal for "thin" electronics where vertical space is limited. --- ### 4. Typical Applications This inductor is primarily used in **DC-DC Converter circuits** for: * **Smartphone PMICs:** Managing power for the application processor. * **SSD Power Rails:** Providing stable voltage in high-speed storage. * **Wearable Devices:** Because of its small 2520 footprint. * **POL (Point of Load) Modules:** In compact communication equipment.