### DFE252010P-R68M: Technical Breakdown The **DFE252010P-R68M** is a high-performance, miniature fixed inductor manufactured by **Murata Electronics**. It belongs to the **DFE252010P** series, which is specifically designed for power circuits where space is a premium, such as in smartphones and wearable devices. --- ### 1. Key Technical Specifications The following table summarizes the core electronic parameters of this component: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.68 µH | | **Tolerance** | ±20% (indicated by 'M') | | **DC Resistance (DCR)** | 29 mΩ (Typical) / 35 mΩ (Max) | | **Rated Current (Isat)** | 4.8 A (Based on Inductance change) | | **Rated Current (Itemp)** | 3.9 A (Based on Temperature rise) | | **Package Size (Metric)** | 2520 (2.5mm x 2.0mm) | | **Height** | 1.0 mm (Max) | | **Core Material** | Metal Alloy (Iron Powder) | --- ### 2. Component Composition & Features #### A. Metal Alloy Technology Unlike traditional ferrite inductors, the DFE series uses a **metal alloy powder core**. * **High Saturation:** It offers superior magnetic saturation characteristics, allowing the inductor to handle high currents without a sharp drop in inductance. * **Magnetic Shielding:** The structure is naturally shielded, which reduces Electromagnetic Interference (EMI) with surrounding components. #### B. Construction (Molded Type) The wire coil is embedded directly into the metal powder and then molded. This results in: * **Low Acoustic Noise:** Reduced "buzzing" compared to traditional wound inductors. * **Robustness:** High physical durability and resistance to vibration. --- ### 3. Part Number Decoder Understanding the naming convention helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **DFE** | Series Name (Metal Alloy Inductor) | | **2520** | Dimensions (2.5mm x 2.0mm) | | **10** | Height (1.0mm) | | **P** | Internal Management Code | | **R68** | Inductance Value (R68 = 0.68 µH) | | **M** | Tolerance (M = ±20%) | --- ### 4. Common Applications * **DC-DC Converters:** Used in point-of-load (POL) power supplies. * **Mobile Devices:** Ideal for CPU/GPU power rails in smartphones and tablets. * **Compact Modules:** Bluetooth modules and IoT sensors where height is restricted to 1mm.