The **FP1208R1-R25-R** is a high-current, shielded drum core power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the FP1208R series, specifically designed for high-frequency voltage regulator modules (VRMs). --- ### ## Technical Specifications Below are the key electrical and physical characteristics of the FP1208R1-R25-R: | Parameter | Value / Description | | :--- | :--- | | **Inductance** | 250 nH (0.25 µH) | | **Tolerance** | ±10% | | **Rated Current (Irms)** | 54 Amps | | **Saturation Current (Isat)** | 62 Amps | | **DC Resistance (DCR)** | 0.28 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 12.10mm x 8.00mm x 8.00mm | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### ## Key Features 1. **High Current Density:** Capable of handling very high peak currents (up to 62A) relative to its physical footprint. 2. **Low DCR:** The extremely low DC resistance (0.28 mΩ) minimizes power loss and improves efficiency in high-load applications. 3. **Shielded Construction:** Features a ferrite core material that provides magnetic shielding to reduce Electromagnetic Interference (EMI). 4. **Halogen Free:** Compliant with modern environmental standards (RoHS and lead-free). --- ### ## Typical Applications This component is primarily used in power management systems where high efficiency and high speed are required: * **Voltage Regulator Modules (VRMs):** Used in servers and workstations to step down voltage for CPUs and GPUs. * **Multi-phase Regulators:** Common in high-density power supplies. * **Desktop and Server Processors:** Providing stable current to high-performance silicon. * **Point-of-Load (POL) Converters:** For decentralized power distribution on PCBs. --- ### ## Internal Structure (Simplified Representation) The inductor uses a "flat-wire" winding technique around a ferrite core to maximize the conductive cross-section area, which is how it achieves such low resistance. ```markdown [ Core Material: Ferrite ] [ Winding: Flat Copper Wire ] [ Termination: Matte Tin over Copper ] ``` ---