The **FP1005R1-R10-R** is a high-current, shielded drum core power inductor manufactured by Eaton (formerly Bussmann). It is specifically designed for high-frequency voltage regulator modules (VRMs) and DC-DC converters. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its physical and electrical characteristics. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.10 µH (100 nH) | | **Tolerance** | ±10% | | **Saturation Current ($I_{sat}$)** | 85 A (at 25°C) | | **RMS Current ($I_{rms}$)** | 53 A | | **DC Resistance (DCR)** | 0.29 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 10.2 x 7.0 x 4.95 mm | --- ### 2. Key Features and Materials The "FP" series (Flat-Pac) is engineered for density and efficiency in power electronics. * **Core Material:** Ferrite core technology, which minimizes core losses at high frequencies. * **Shielding:** Magnetically shielded construction to reduce Electromagnetic Interference (EMI) with neighboring components. * **Low DCR:** The exceptionally low DC resistance (0.29 mΩ) ensures minimal power loss and heat generation even at high current loads. * **Construction:** Utilizes a flat-wire design which allows for a smaller footprint while maintaining high current capacity. --- ### 3. Application Areas This component is typically found in environments where high current is required in a very small space: 1. **Multi-phase Regulators:** Used in CPU/GPU power stages for servers and high-end workstations. 2. **Voltage Regulator Modules (VRM):** Essential for converting high input voltages down to low output voltages (e.g., 12V to 1V). 3. **Network and Telecom:** Powering high-speed data switches and routers. 4. **Point-of-Load (POL) Converters:** Providing localized power to FPGAs and ASICs. --- ### 4. Part Number Breakdown `FP1005R1-R10-R` * **FP1005:** Product Series and Size (approx. 10mm x 5mm footprint). * **R1:** Revision or internal version code. * **R10:** Inductance value (R10 = 0.10 µH). * **-R:** RoHS compliant suffix.