The **FP1010R1-R330-R** is a high-current, flat-pac power inductor manufactured by Eaton (formerly Cooper 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 electrical characteristics. | Parameter | Specification | | :--- | :--- | | **Inductance** | 330 nH (0.33 µH) | | **Tolerance** | ±10% | | **Inductance @ $I_{sat}1$** | 224 nH | | **DCR (Direct Current Resistance)** | 0.255 mΩ (Nominal) | | **Saturation Current ($I_{sat}$)** | 40 A (at 25°C) | | **RMS Current ($I_{rms}$)** | 50 A | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Characteristics The "1010" in the part number refers to its physical footprint. * **Dimensions:** Approximately 10.0mm x 10.0mm x 10.0mm. * **Construction:** Ferrite core material with a "Flat-Pac" design. * **Mounting Type:** Surface Mount (SMD/SMT). * **Termination:** Lead-free, RoHS compliant. --- ### 3. Key Features and Benefits * **High Power Density:** The ferrite core allows for high current handling in a relatively small volumetric space. * **Low Core Loss:** Optimized for high-frequency switching (up to 2 MHz), which improves overall power supply efficiency. * **Low DCR:** The extremely low resistance (0.255 mΩ) minimizes power dissipation as heat, which is critical for high-current applications. * **Tight Tolerance:** Controlled inductance values ensure stable performance in multi-phase buck converters. --- ### 4. Common Applications This inductor is typically found in high-demand computing and industrial environments: 1. **Multi-phase buck converters:** Used to power CPUs, GPUs, and ASICs. 2. **Voltage Regulator Modules (VRM):** Found on server motherboards and high-end desktop boards. 3. **Data Centers:** High-current DC-DC modular power supplies. 4. **Point-of-Load (POL) Converters:** Providing stable voltage near the integrated circuit it powers. ---