The **FDU1260-R45M** is a high-performance, shielded fixed inductor typically used in power management circuits. It is part of the FDU series, known for its high current handling and compact surface-mount design. --- ### 1. Key Technical Specifications The model number provides specific data regarding its physical size and electrical properties: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.45 µH | | **Tolerance** | ±20% (M) | | **Case Size** | 1260 (Approx. 12.5 x 12.5 x 6.0 mm) | | **DCR (Direct Current Resistance)** | Very Low (Typically < 1.0 mΩ) | | **Saturation Current ($I_{sat}$)** | High (Typically > 30A) | | **Core Material** | Metal Alloy / Magnetic Powder | --- ### 2. Design and Construction The FDU1260-R45M utilizes advanced materials and manufacturing techniques to optimize efficiency: * **Shielded Construction:** The inductor is magnetically shielded to minimize Electromagnetic Interference (EMI), which is critical for densely packed PCB layouts. * **Metal Alloy Core:** Unlike traditional ferrite cores, the metal alloy powder core provides a "soft" saturation characteristic. This means the inductance drops gradually rather than abruptly as current increases. * **Flat Wire Technology:** Often uses flat copper wire to maximize the cross-sectional area, which drastically reduces DCR and minimizes heat generation. --- ### 3. Applications This specific component is designed for high-frequency DC-DC converters and high-current power supplies. Common use cases include: * **Voltage Regulator Modules (VRMs):** Found in CPU and GPU power delivery systems on motherboards. * **Industrial Power Supplies:** Used in high-wattage converters where efficiency is a priority. * **Automotive Electronics:** Infotainment systems and ADAS modules requiring robust power filtering. * **Servers and Networking:** High-current Point-of-Load (PoL) converters. --- ### 4. Part Number Breakdown The nomenclature generally follows this pattern: | Segment | Meaning | | :--- | :--- | | **FDU** | Series Identifier (High current, metal alloy) | | **1260** | Dimensions (12mm x 12mm base, 6.0mm height) | | **R45** | Inductance value (R = decimal point; 0.45 µH) | | **M** | Tolerance code (M = ±20%) |