The **FP1308R3-R32-R** is a high-current, shielded drum core power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **FP1308 series**, which is specifically designed for high-frequency voltage regulator modules (VRMs) and high-density power supplies. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.32 µH (320 nH) | | **Tolerance** | ±10% | | **Rated Current ($I_{rms}$)** | 48 A | | **Saturation Current ($I_{sat}$)** | 62 A | | **DC Resistance (DCR)** | 0.42 mΩ (max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 13.4mm x 8.2mm x 8.0mm | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Key Features and Construction * **High Current Handling:** Due to its extremely low DCR (0.42 mΩ), it can handle continuous currents up to 48A with minimal power loss through heat. * **Ferrite Core Material:** The "R" in the series usually denotes a ferrite material characterized by low core losses at high frequencies. * **Magnetically Shielded:** The design minimizes Electromagnetic Interference (EMI), making it suitable for densely packed PCB layouts. * **Robust Design:** The "FP" stands for Flat-Pac, indicating a low-profile, high-reliability construction. --- ### 3. Applications This part is commonly found in power management circuits for high-performance computing, including: 1. **Multi-phase VRMs:** Used in CPU/GPU power delivery for servers and gaming PCs. 2. **Point of Load (POL) Converters:** High-efficiency DC-DC converters. 3. **Network Equipment:** Switches, routers, and base stations requiring high current at low voltages. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **FP1308:** Product Series and Size (approx. 13mm x 8mm footprint). * **R3:** Version/Revision code for the mechanical or material platform. * **R32:** Inductance value (R32 = 0.32 µH). * **-R:** RoHS compliant (Lead-free).