## Technical Analysis of FP1005R1-R12-R The **FP1005R1-R12-R** is a high-frequency, high-current power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **FP1005 series**, which is widely used in modern power management applications due to its flat-pack, power-dense design. --- ### 1. Key Specifications Below are the critical electrical and physical parameters for this specific part: | Parameter | Value | | :--- | :--- | | **Inductance** | 120 nH (0.12 µH) | | **Tolerance** | ±10% | | **DC Resistance (DCR)** | 0.42 mΩ (nominal) | | **Saturation Current ($I_{sat}$)** | 61 A (typical at 25°C) | | **RMS Current ($I_{rms}$)** | 43 A | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 10.2mm x 7.0mm x 4.95mm | --- ### 2. Component Features The "R1" designation in the series indicates a specific material and construction optimization: * **High Current Handling:** Designed specifically for multi-phase Voltage Regulator Modules (VRMs) and Point-of-Load (POL) converters. * **Low DCR:** The extremely low DC resistance (measured in milliohms) minimizes power loss and improves efficiency in high-current scenarios. * **Ferrite Core Material:** The use of ferrite ensures low core losses at high switching frequencies (up to 2 MHz or more). * **Halogen Free / RoHS Compliant:** Meets modern environmental regulatory standards. --- ### 3. Part Number Breakdown The part number can be decoded as follows: | Segment | Meaning | | :--- | :--- | | **FP1005** | Product Series (Flat-Pack, 10mm x 5mm nominal footprint) | | **R1** | Version/Material variation | | **-R12** | Inductance value (R12 = 0.12 µH) | | **-R** | RoHS Compliant suffix | --- ### 4. Typical Applications This inductor is typically found in high-performance computing environments where high current and low voltage are required: * **Servers and Workstations:** Powering CPUs, GPUs, and FPGAs. * **Data Centers:** Networking switches and routers. * **Voltage Regulator Modules (VRMs):** Specifically for multi-phase buck converters. --- ### 5. Footprint Information (Approximate) ```text Dimensions: L: 10.2 mm (Max) W: 7.0 mm (Max) H: 4.95 mm (Max) ```