### Technical Overview: FP1308R1-R11-R The **FP1308R1-R11-R** is a high-frequency, high-current power inductor typically manufactured by **Eaton (formerly Cooper Bussmann/Coiltronics)**. It is part of the FP1308R series, which is designed specifically for multi-phase Voltage Regulator Modules (VRMs) and high-current power supplies. --- ### 1. Key Technical Specifications The part number encodes specific characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 110 nH (0.11 µH) | | **Tolerance** | ±10% | | **Current Rating ($I_{rms}$)** | 68 Amps (typical) | | **Saturation Current ($I_{sat}$)** | 92 Amps (at 25°C) | | **DC Resistance (DCR)** | 0.23 mΩ (typical) | | **Operating Temperature** | -40°C to +125°C | | **Package/Footprint** | 13.4mm x 8.0mm x 8.0mm (Surface Mount) | --- ### 2. Core Features and Construction * **High Frequency Performance:** Optimized for switching frequencies up to 2MHz, making it ideal for modern high-speed power conversion. * **Ferrite Core Material:** Utilizes a ferrite core which offers low core losses at high frequencies, improving overall power efficiency. * **Flat-Wire Design:** The "R1" designation often refers to the internal construction. It uses flat-wire windings to minimize skin effect and provide extremely low DC Resistance (DCR), which reduces heat generation. * **Halogen Free & RoHS Compliant:** Meets modern environmental regulatory standards. --- ### 3. Applications This specific inductor is found in high-performance computing environments: 1. **Server VRMs:** Powering high-wattage CPUs and GPUs. 2. **ASIC/FPGA Powering:** Providing stable, high-current rails for crypto-mining or AI accelerators. 3. **Data Center Infrastructure:** Used in high-density power modules. 4. **Point-of-Load (POL) Converters:** Step-down regulators located near the target load. --- ### 4. Part Number Breakdown * **FP1308:** Series name (indicates physical dimensions: 13mm length, 8mm width). * **R1:** Revision or internal construction code (High Current version). * **R11:** Inductance value ($R11 = 0.11 \mu H$). * **-R:** Indicates RoHS compliance.