The **FP1008R4-R180-R** is a high-current, shielded drum core power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the FP1008 series, which is specifically designed for high-frequency, high-current power applications. --- ### 1. Key Technical Specifications The part number "R180" indicates the inductance value, while the "R" suffix typically denotes RoHS compliance. | Parameter | Specification | | :--- | :--- | | **Inductance** | 180 nH (0.18 µH) | | **Tolerance** | ±10% | | **Current Rating (Irms)** | ~53 Amps (Temperature rise dependent) | | **Saturation Current (Isat)** | ~72 Amps (at 25°C) | | **DC Resistance (DCR)** | 0.17 mΩ (milliohms) typical | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 10.2mm x 8.0mm x 8.0mm (Surface Mount) | --- ### 2. Physical and Material Construction * **Core Material:** Ferrite core. This material provides low core losses at high frequencies, making it ideal for modern power converters. * **Shielding:** It is a **shielded** inductor, meaning the magnetic flux is contained within the component. This reduces Electromagnetic Interference (EMI) with neighboring components on the PCB. * **Termination:** Solder-plated copper leadframe for robust Surface Mount Technology (SMT) assembly. --- ### 3. Functional Features * **High Current Density:** The part is designed to handle very high current loads (50A+) in a relatively small physical footprint. * **Low DCR:** The exceptionally low DC resistance (0.17 mΩ) minimizes power loss due to heat, significantly increasing the overall efficiency of the power supply. * **Soft Saturation:** The ferrite material allows for a controlled drop in inductance as current increases, preventing sudden circuit failure. --- ### 4. Common Applications This inductor is primarily found in high-performance computing and power management environments: * **Voltage Regulator Modules (VRMs):** Used in CPU/GPU power delivery on motherboards and servers. * **DC-DC Converters:** Point-of-Load (POL) converters where high efficiency is required. * **Multi-phase Regulators:** Often used in parallel configurations to distribute high current loads. * **Data Centers:** Powering high-speed networking equipment and storage arrays. --- ### 5. Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **FP1008** | Product Series / Size (approx. 10mm x 8mm) | | **R4** | Version/Revision code | | **R180** | Inductance Value (R18 = 0.18 µH) | | **-R** | RoHS Compliant | ---