The **FP1007R1-R17-R** is a high-current, flat-pac surface mount (SMT) power inductor typically used in multi-phase voltage regulator modules (VRMs). It is part of the FP1007R series manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). ### 1. Key Technical Specifications The part number "R17" denotes the inductance value, while the suffix "R" indicates RoHS compliance. | Parameter | Specification | | :--- | :--- | | **Inductance ($L$)** | 170 nH (0.17 µH) | | **Tolerance** | ±10% | | **Current Rating ($I_{rms}$)** | ~61 Amperes | | **Saturation Current ($I_{sat}$)** | ~85 Amperes (at 25°C) | | **DC Resistance (DCR)** | 0.29 mΩ (milliohms) typical | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 10.2mm x 7.0mm x 7.2mm | --- ### 2. Internal Construction and Materials The "FP" in the name stands for **Flat-Pac**. This series is engineered for efficiency in high-density power applications: * **Core Material:** Ferrite core. This ensures low core losses at high switching frequencies (up to 2 MHz). * **Winding:** It features a high-frequency, single-turn "staple" design or flat-wire construction. This minimizes the **Proximity Effect** and **Skin Effect**, reducing AC resistance. * **Leadframe:** The part utilizes a ruggedized surface-mount leadframe that provides excellent mechanical stability during PCB vibration or thermal cycling. --- ### 3. Application Areas Because of its extremely low DCR and high saturation current, this inductor is primarily found in: 1. **Server & Networking:** Multi-phase buck converters for CPUs, GPUs, and ASICs. 2. **Voltage Regulator Modules (VRMs):** Used in "Point-of-Load" (POL) power supplies. 3. **Data Centers:** High-current power distribution where thermal efficiency is critical. 4. **Desktop Computing:** High-end motherboard power phases. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in selecting alternatives: * **FP1007:** Product Series and Footprint (10mm x 7mm approx). * **R1:** Version/Revision code (Standard high-current). * **R17:** Inductance value ($0.17 \mu H$). * **-R:** RoHS compliant / Lead-free. ---