The **FP1005R3-R10-R** is a high-performance, high-current power inductor typically used in voltage regulator modules (VRMs) and DC-DC converters. It is manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Inductance** | 100 nH (0.10 µH) | | **Tolerance** | ±10% | | **Rated Current (Irms)** | 60 Amps | | **Saturation Current (Isat)** | 85 Amps | | **DC Resistance (DCR)** | 0.29 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 10.0mm x 5.0mm x 5.0mm | --- ### 2. Physical Structure and Materials The "FP" in the part number stands for **Flat-Pac**. This series is designed with a unique construction to handle extreme power density: * **Core Material:** Ferrite core, which provides low core losses at high frequencies. * **Winding:** It uses a flat wire "one-turn" design. This minimizes the DC resistance (DCR), which is critical for maintaining high efficiency and reducing heat generation. * **Shielding:** The part is magnetically shielded to minimize Electromagnetic Interference (EMI) with surrounding components on the PCB. --- ### 3. Application Use Cases This specific inductor is designed for multi-phase buck converters found in high-end computing environments. * **Server & Networking:** Powering CPUs, GPUs, and ASICs where currents exceed 100A across multiple phases. * **Voltage Regulator Modules (VRMs):** Used in point-of-load (POL) converters to step down voltage (e.g., from 12V to 1.8V or lower). * **Data Centers:** High-efficiency power supplies where thermal management is a priority. --- ### 4. Part Number Breakdown The nomenclature follows a specific logic: | Segment | Meaning | |:---|:---| | **FP1005** | Series name and physical size (Approx. 10mm x 5mm) | | **R3** | Revision/Version number | | **R10** | Inductance value (R10 = 0.10 µH) | | **-R** | RoHS compliant / Lead-free | --- ### 5. Footprint (Code Example) While this is a hardware component, PCB designers often look for footprint dimensions for CAD software like Altium or KiCad. ```markdown Dimensions (Nominal): - Length: 10.2 mm - Width: 4.9 mm - Height: 4.95 mm - Pad Width: 2.5 mm ```