The **FP1109B1-R150-R** is a high-current, shielded power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the FP1109 series, which is specifically designed for high-frequency voltage regulator modules (VRMs) and high-density power applications. --- ### 1. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 150 nH (0.15 µH) | | **Tolerance** | ±10% | | **Current Rating (Irms)** | ~41 Amperes | | **Saturation Current (Isat)** | ~64 Amperes (at 25°C) | | **DC Resistance (DCR)** | 0.42 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 11.0mm x 8.0mm x 9.0mm (SMD) | --- ### 2. Key Features * **High Current Handling:** Due to its very low DCR (Direct Current Resistance), it can handle high RMS currents with minimal power loss through heat. * **Ferrite Core Material:** The use of ferrite ensures low core losses at high switching frequencies, typically ranging from 100 kHz up to 2 MHz. * **Shielded Construction:** The inductor is magnetically shielded to reduce Electromagnetic Interference (EMI), which is critical in dense PCB layouts. * **Halogen Free & RoHS Compliant:** Meets modern environmental and safety standards for electronic manufacturing. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variations: | Segment | Meaning | | :--- | :--- | | **FP1109** | Series name (Flat-Pac, 11x9mm footprint) | | **B1** | Version/Mechanical variation code | | **R150** | Inductance value (R = decimal point; 150 = 0.150 µH) | | **-R** | RoHS compliant | --- ### 4. Typical Applications The FP1109B1-R150-R is commonly found in power management circuits for high-performance computing: 1. **Multi-phase Buck Converters:** Used in CPU/GPU power delivery on motherboards and server cards. 2. **Voltage Regulator Modules (VRM):** Essential for converting high input voltages to low voltages required by microprocessors. 3. **Point-of-Load (POL) Converters:** Used in telecommunications and data storage equipment. ---