The **FP1108L1-R085-R** is a high-current, high-frequency, power inductor specifically designed for use in multi-phase Voltage Regulator Modules (VRMs). It is commonly manufactured by companies like **Eaton (formerly Cooper Bussmann)**. --- ### 1. General Specifications The following table highlights the core electrical and physical characteristics of this component: | Parameter | Value | | :--- | :--- | | **Inductance (L)** | 85 nH (Nanohenries) | | **Current Rating ($I_{sat}$)** | ~88 Amperes (Saturation Current) | | **DC Resistance (DCR)** | ~0.18 m$\Omega$ (Milliohms) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) | | **Footprint/Package** | 11.0mm x 8.0mm x 7.5mm | --- ### 2. Key Features * **High Current Density:** Capable of handling massive amounts of current with minimal thermal buildup due to its extremely low DCR. * **Ferrite Core Material:** Utilizes a low-loss ferrite core optimized for high-frequency switching (typically up to 2MHz or higher). * **Halogen-Free & RoHS Compliant:** Meets modern environmental and safety standards for lead-free soldering processes. * **Multi-Phase Compatibility:** Designed specifically to work in parallel configurations where multiple inductors share a large load. --- ### 3. Application Areas These parts are industrial-grade components typically found in high-performance computing environments: * **Servers & Data Centers:** Used in CPU/GPU power delivery modules. * **Graphics Cards:** Found on high-end desktop GPU PCBs to manage power to the core. * **Networking Hardware:** Switches and routers requiring high-current power supplies. * **Voltage Regulator Modules (VRM):** Essential for converting 12V inputs into low-voltage (sub-1.0V) high-current outputs. --- ### 4. Part Number Breakdown The nomenclature can be interpreted as follows: * **FP1108:** Refers to the series and physical size (approx. 11mm x 8mm). * **L1:** Designates the specific internal design or version of the lead frame. * **R085:** Represents the inductance value (085 = 85 nH). * **-R:** Indicates the part is RoHS compliant. ---