The **FP1108L1-R270-R** is a high-current, shielded drum core power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the FP1108 series, which is specifically designed for high-frequency voltage regulator modules (VRMs) and multi-phase applications. ### 1. Technical Specifications The alphanumeric code provides specific details regarding the component's performance characteristics. | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.270 µH (270 nH) | | **Tolerance** | ±10% | | **Full Part Number** | FP1108L1-R270-R | | **DCR (Direct Current Resistance)** | ~0.31 mΩ (typical) | | **Saturation Current ($I_{sat}$)** | ~64 Amperes | | **RMS Current ($I_{rms}$)** | ~55 Amperes | | **Dimensions** | 11.0mm x 8.0mm x 7.5mm | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Key Features * **High Current Handling:** Designed to manage high peak currents (up to 64A) without saturating, making it ideal for modern CPU and GPU power stages. * **Low DCR:** The exceptionally low DC resistance (measured in milliohms) minimizes power loss and heat generation, increasing overall energy efficiency. * **Ferrite Core Material:** Utilizes a ferrite core which provides low core losses at high switching frequencies (up to 2 MHz). * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with RoHS standards. --- ### 3. Application Use Cases This specific inductor is primarily found in high-performance computing environments: 1. **Multi-phase Buck Converters:** Used in parallel to provide high current at low voltages to processors. 2. **Voltage Regulator Modules (VRM):** Essential for motherboards and server cards. 3. **Point-of-Load (POL) Converters:** Used in telecommunications and data center equipment. 4. **Graphics Cards:** Powering high-end GPUs that require stable, high-amperage current. --- ### 4. Part Number Breakdown ```text FP 1108 L1 - R270 - R | | | | | | | | | └── RoHS Compliant | | | └─────── Inductance Value (R270 = 0.270µH) | | └───────────── Version/Internal Code | └────────────────── Size Dimensions (11mm x 8mm) └────────────────────── Family Series (Flat-Pac Inductor) ```