The **FP1208R1-R15-R** is a high-current, shielded drum core inductor specifically designed for high-frequency power conversion applications. It belongs to the FP1208 series, commonly manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). --- ## 1. Technical Specifications The part number encodes specific characteristics of the component. Below is the technical breakdown: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.15 µH (Microhenries) | | **Tolerance** | ±10% | | **Current Rating (Irms)** | ~55 Amps (Typical thermal limit) | | **Saturation Current (Isat)** | ~84 Amps (Point where inductance drops) | | **DC Resistance (DCR)** | 0.23 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 12.1mm x 8.0mm x 8.0mm | --- ## 2. Key Features * **High Current Density:** Capable of handling very high peak currents without saturating, making it ideal for modern high-performance processors. * **Low DCR:** The exceptionally low Direct Current Resistance (0.23 mΩ) minimizes power loss and heat generation. * **Magnetic Shielding:** The design reduces Electromagnetic Interference (EMI), preventing the inductor from interfering with nearby sensitive components. * **Ferrite Core Material:** Provides stable performance over a wide range of frequencies and temperatures. --- ## 3. Applications This specific inductor is typically found in high-load power management circuits: 1. **Multi-phase VCORE Regulators:** Used in motherboards and servers to provide power to CPUs and GPUs. 2. **Voltage Regulator Modules (VRM):** High-efficiency power modules for telecommunications. 3. **Point-of-Load (POL) Converters:** Used where high current needs to be stepped down from a higher voltage rail (e.g., 12V to 1.8V). 4. **Distributed Power Systems:** Found in data centers and industrial computing. --- ## 4. Part Number Decoder The nomenclature follows this logic: * **FP1208:** Series identifier (Size approx. 12mm x 8mm). * **R1:** Revision or specific manufacturing series. * **R15:** Inductance value ($R$ acts as a decimal, so $0.15 \mu H$). * **-R:** RoHS compliant / Lead-free.