## Technical Overview: FP0805R1-R20-R The **FP0805R1-R20-R** is a high-frequency, high-current power inductor typically manufactured by **Eaton (formerly Coiltronics)**. It belongs to the **FP0805R1** series, which is characterized by its "Flat-Pac" design, offering low DCR (DC Resistance) and high power density. ### 1. Key Specifications The part number follows a specific nomenclature that defines its electrical properties: | Parameter | Specification | Details | |:---|:---|:---| | **Inductance** | 200 nH (0.20 µH) | Indicated by "R20" | | **Tolerance** | ±10% | Standard for this series | | **OCL¹** | 200 nH | Open Circuit Inductance | | **Irms²** | ~35 - 42 Amperes | Current for 40°C temperature rise | | **Isat³** | ~50 - 65 Amperes | Saturation current (20% drop in L) | | **DCR (Max)** | 0.42 mΩ | Ultra-low resistance for efficiency | | **Footprint** | 8.0 x 8.0 mm | Height is approx 5.0 mm | *¹ OCL: Open Circuit Inductance ±10% @ 0Adc.* *² Irms: DC current for an approximate temperature rise of 40°C.* *³ Isat: Peak current for approximately 20% rolloff at 25°C.* --- ### 2. Physical Construction This component is designed for Surface Mount Technology (SMT) and features: * **Ferrite Core:** High frequency, low-loss material. * **Flat-Pac Design:** Utilizes flat wire technology to minimize skin effect and maximize current handling. * **Halogen Free / RoHS Compliant:** Standard for modern electronic manufacturing. --- ### 3. Application Areas Because of its high saturation current and extremely low DCR, the FP0805R1-R20-R is primarily used in: * **Multi-phase Regulators:** Common in CPU/GPU Voltage Regulator Modules (VRMs). * **Graphics Cards:** Powering high-performance GPUs. * **Servers and Data Centers:** High-efficiency DC-DC converters. * **Point-of-Load (POL) Converters:** Providing stable power to ASICs and FPGAs. --- ### 4. Part Number Breakdown | Segment | Meaning | |:---|:---| | **FP0805** | Product Series (Flat-Pac, 8.0 x 8.0 mm) | | **R1** | Version/Generation indicator | | **R20** | Inductance value (R = decimal point; 0.20 µH) | | **-R** | RoHS Compliant / Tape & Reel packaging |