### FP1308-R44-R: Technical Overview The **FP1308-R44-R** is a high-current, high-frequency, shielded power inductor designed primarily for use in multi-phase voltage regulator modules (VRMs). It is manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). --- ### Key Specifications Below is a breakdown of the primary electrical and physical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.44 µH (±10%) | | **Current Rating (Isat)** | ~70 Amps (Saturation Current) | | **Current Rating (Irms)** | ~53 Amps (Heating Current) | | **DCR (Direct Current Resistance)** | 0.42 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Dimensions** | 13.4mm x 8.2mm x 8.0mm | --- ### Component Features 1. **High Power Density:** The "Flat-Pac" (FP) series is designed to handle very high current levels in a relatively small footprint, making it ideal for modern high-performance CPUs and GPUs. 2. **Ferrite Core Material:** It utilizes a ferrite core which provides low core losses at high switching frequencies (up to 2 MHz). 3. **Shielded Construction:** The inductor is magnetically shielded to minimize Electromagnetic Interference (EMI), which is critical for dense PCB layouts. 4. **Low DCR:** The extremely low DC resistance (measured in milliohms) minimizes power dissipation as heat, increasing the overall efficiency of the power supply. --- ### Common Applications The FP1308-R44-R is typically found in the following environments: * **Voltage Regulator Modules (VRMs):** Used in servers and workstations to step down voltage for processors. * **Multi-phase Buck Converters:** Balancing current across multiple power phases. * **Graphics Cards:** Providing stable power to high-end GPUs. * **Desktop and Server Motherboards:** Managing power delivery for high-TDP components. --- ### Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **FP** | Flat-Pac Series (Inductor Family) | | **1308** | Physical Size (Approx. 13mm x 8mm) | | **-R44** | Inductance value (R44 = 0.44 µH) | | **-R** | RoHS Compliant / Lead-Free |