## Overview of FP0404R1-R065-R The **FP0404R1-R065-R** is a high-frequency, high-current power inductor specifically designed for use in multi-phase voltage regulator modules (VRMs). It is manufactured by **Eaton (formerly Cooper Bussmann)** as part of their FP (Flat-Pac) series. --- ### Technical Specifications The following table outlines the core electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance ($L$)** | 65 nH (Nanohenries) | | **Tolerance** | ±10% | | **Full Load Current ($I_{sat}$)** | ~83 A (Amperes) | | **DCR (Direct Current Resistance)** | 0.32 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4.0 x 4.0 x 4.0 mm | | **Termination** | Surface Mount (SMD) | --- ### Key Features and Construction 1. **High Current Handling:** Due to its extremely low DCR (milli-ohms), it can handle very high saturation currents without significant power loss or heat generation. 2. **Ferrite Core Material:** The "FP" series uses a high-frequency ferrite material that minimizes core losses, making it ideal for switching frequencies up to several Megahertz (MHz). 3. **Flat-Pac Design:** The cubic shape (4.0mm dimensions) is optimized for high power density, allowing engineers to place several inductors in close proximity for multi-phase designs. 4. **Halogen-Free and RoHS Compliant:** Meets modern environmental and safety standards for lead-free soldering processes. --- ### Typical Applications This specific inductor is found in high-performance computing environments where stable, high-current power delivery is critical: * **Computing & Servers:** CPU/GPU voltage regulators (Vcore). * **Networking:** High-speed routers and switches. * **Data Centers:** Power modules for high-density servers. * **Graphics Cards:** Power stages for high-end GPUs. --- ### Comparison with Standard Inductors Unlike general-purpose wire-wound inductors, the **FP0404R1-R065-R** is optimized for **speed and efficiency**: * **Low Inductance (65nH):** Allows for a faster transient response (the ability of the power supply to react to sudden changes in current demand). * **Vertical Construction:** Often features a single-turn or high-aspect-ratio conductor to keep resistance at an absolute minimum.