## FP1008-120-R Electronic Component Overview The **FP1008-120-R** is a high-frequency, high-current power inductor designed specifically for use in multi-phase regulators, voltage regulator modules (VRMs), and point-of-load (POL) converters. It belongs to the **FP1008 series** manufactured by **Eaton (formerly Cooper Bussmann/Coiltronics)**. --- ### Key Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 120 nH (0.120 µH) | | **Tolerance** | ±10% | | **Current Rating (Irms)** | 55 Amps | | **Saturation Current (Isat)** | 85 Amps (at 25°C) | | **DC Resistance (DCR)** | 0.17 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 10.2mm x 8.0mm x 8.0mm | --- ### Critical Technical Features 1. **High Current Handling:** The part is designed with a flat-wire construction that minimizes DC resistance (DCR). This allows it to handle extremely high saturation currents (up to 85A) without the inductance dropping significantly. 2. **Ferrite Core Material:** The use of ferrite material ensures low core losses at high switching frequencies, typically ranging from 300 kHz to over 2 MHz. This makes it ideal for modern high-efficiency power supplies. 3. **Tight Tolerance:** With a ±10% tolerance, it provides consistent performance across multi-phase power designs, ensuring balanced current sharing between phases in a CPU or GPU power delivery system. 4. **Surface Mount Technology (SMT):** The component is designed for automated pick-and-place assembly. Its "R" suffix indicates that it is **RoHS compliant**. --- ### Common Applications * **Computing:** Multi-phase VRMs for CPUs (Intel/AMD) and GPUs (NVIDIA/AMD). * **Networking:** High-current DC-DC converters for routers and switches. * **Data Centers:** Server power modules and voltage step-down regulators. * **Industrial:** High-efficiency power supplies where space is limited but power requirements are high. --- ### Internal Structure (Typical) The FP1008 series utilizes a **one-turn or multi-turn flat wire** wrapped through a rectangular ferrite block. This "bead" style construction provides a closed magnetic path which minimizes Electromagnetic Interference (EMI) and maximizes the power density.