The **FP3-8R2-R** is a high-performance, high-current power inductor typically used in DC-DC converters, voltage regulator modules (VRMs), and point-of-load (POL) applications. It belongs to the **FP3 series** manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). --- ## 1. Technical Specifications Below are the primary electronic characteristics of the FP3-8R2-R: | Parameter | Value | | :--- | :--- | | **Inductance** | 8.2 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 3.3 Amps (typical) | | **Saturation Current (Isat)** | 2.5 Amps (typical) | | **DC Resistance (DCR)** | 71.0 mΩ (max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | Surface Mount (SMD) | --- ## 2. Key Electronic Features ### A. Flat-Pac™ Construction The "FP" in the part number stands for **Flat-Pac**. This design utilizes a flat wire construction which provides: * **Lower DCR:** Minimizes power loss and heat generation. * **High Power Density:** Large current handling capability in a small footprint. ### B. Core Material The inductor uses a ferrite core material. This ensures: * **Low Core Losses:** Highly efficient at high frequencies (up to 2 MHz). * **Controlled Saturation:** The "Isat" rating indicates the point where inductance drops by a specific percentage (usually 30%) as DC current increases. ### C. Magnetically Shielded The part is magnetically shielded to prevent Electromagnetic Interference (EMI) from affecting nearby sensitive components on the PCB. --- ## 3. Application Use Cases The FP3-8R2-R is commonly integrated into the following electronic circuits: 1. **Buck/Boost Converters:** Acting as the energy storage element to smooth out output current. 2. **Server & Networking:** Providing stable power to microprocessors and FPGAs. 3. **Battery Powered Devices:** Where high efficiency is critical to extending battery life. 4. **LED Drivers:** Used in constant current regulation circuits. --- ## 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **FP3:** Series designation (Size/Type). * **8R2:** Inductance value (8.2 µH). The "R" represents the decimal point. * **R:** RoHS compliant (Lead-free).