The **FP0906R1-R12-R** is a high-current, non-isolated power inductor typically used in multi-phase voltage regulator modules (VRMs). It is part of the FP0906R series manufactured by Eaton (formerly Cooper Bussmann). --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 120 nH (0.12 µH) | | **Tolerance** | ±10% | | **Current Rating ($I_{rms}$)** | 62 A | | **Saturation Current ($I_{sat}$)** | 77 A | | **DC Resistance (DCR)** | 0.29 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | SMD (9.1 x 6.3 x 5.8 mm) | --- ### 2. Physical Construction and Features The part is designed for high-density power applications where space is limited but current requirements are high. * **Materials:** It utilizes a ferrite core material which provides low core losses at high switching frequencies. * **Winding:** It features a "flat-wire" or single-turn winding construction. This minimizes DC resistance (DCR), which reduces heat generation and improves efficiency. * **Mounting:** It is a Surface Mount Device (SMD) with a ruggedized footprint to withstand mechanical vibrations. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with environmental regulations. --- ### 3. Applications and Usage This specific inductor is found in environments requiring high-speed transient response and high efficiency: 1. **Computing:** Multi-phase buck converters for CPUs, GPUs, and ASICs. 2. **Data Centers:** Server power supplies and Voltage Regulator Modules (VRMs). 3. **Networking:** High-end routers and switches where local DC-DC conversion is required near the processor. 4. **Point of Load (POL):** High-current converters converting 12V down to sub-1V levels. --- ### 4. Part Number Breakdown * **FP0906:** Series identifier (Dimensions approx. 9.1mm x 6.3mm). * **R1:** Revision or design variation code. * **R12:** Inductance value (R12 = 0.12 µH or 120 nH). * **-R:** RoHS compliant.