The **FP2-D100-R** is a specific electronic component, typically categorized as a **Surface Mount Inductor (SMD)**, often manufactured by companies like Eaton (formerly Cooper Bussmann/Coiltronics). It is part of the FP2 series, designed for high-frequency, high-current applications. --- ### 1. Key Technical Specifications Below are the primary electronic characteristics for the FP2-D100-R: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 100 nH (0.10 µH) | | **Tolerance** | ±10% | | **Current Rating (Isat)** | ~30A to 40A (Saturation Current) | | **Current Rating (Irms)** | ~28A (Surface Temperature Rise) | | **DC Resistance (DCR)** | Extremely Low (Approx. 0.35 mΩ to 0.50 mΩ) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount Device (SMD/SMT) | --- ### 2. Physical Construction and Design The "FP" in the part number stands for **Flat-Pac**, referring to its physical build: * **Core Material:** Usually a Ferrite core which provides low core losses at high frequencies. * **Winding:** Utilizes a flat-wire or "power bead" architecture. This minimizes skin effect and allows for a very low DCR, which improves efficiency. * **Shielding:** It is a shielded construction, which helps contain Electromagnetic Interference (EMI), making it suitable for dense PCB layouts. --- ### 3. Common Applications Due to its high current handling and low inductance, the FP2-D100-R is commonly found in the following electronic circuits: 1. **Multi-phase VCORE Regulators:** Used in CPU/GPU power delivery modules for servers and high-end workstations. 2. **Voltage Regulator Modules (VRMs):** Essential for converting high input voltages to the low voltages required by microprocessors. 3. **High-Frequency DC-DC Converters:** Ideal for point-of-load (POL) converters where space is limited and efficiency is critical. 4. **Desktop and Server Motherboards:** Providing stable current to high-performance chipsets. --- ### 4. Part Number Breakdown While manufacturer codes vary slightly, the breakdown generally follows this logic: * **FP2:** Series name (Flat-Pac size 2). * **D:** Designators for specific internal revisions or packaging styles. * **100:** Inductance value code (100 represents 100nH). * **R:** RoHS compliant (Lead-free).