The **FP1505R1-R30-R** is a high-current, shielded drum core power inductor manufactured by Eaton (formerly Bussmann/Coiltronics). It is part of the FP1505 series, specifically designed for high-frequency voltage regulator modules (VRMs) and DC-DC converters. --- ### 1. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 300 nH (0.30 µH) | | **Tolerance** | ±10% | | **Inductance @ Isat** | 216 nH (minimum) | | **Rated Current (Irms)** | 35 Amps | | **Saturation Current (Isat)** | 56 Amps | | **DC Resistance (DCR)** | 0.35 mΩ (typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 15.0mm x 4.9mm x 5.1mm | --- ### 2. Key Features and Construction * **High Current Density:** Capable of handling peaks up to 56A, making it ideal for modern CPU and GPU power delivery. * **Low DCR:** With a resistance of only 0.35 mΩ, it minimizes power loss ($P = I^2R$) and heat generation. * **Ferrite Core Material:** Provides low core losses at high switching frequencies (up to 2 MHz). * **Shielded Design:** The magnetic shielding reduces Electromagnetic Interference (EMI) with surrounding components. * **Halogen-Free / RoHS Compliant:** Meets modern environmental safety standards. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variations of this component: `FP 15 05 R1 - R30 - R` 1. **FP:** Product family (Fixed Power Inductor). 2. **15:** Length/Width dimension code (~15mm). 3. **05:** Height dimension code (~5mm). 4. **R1:** Revision or internal designator. 5. **R30:** Inductance value (R = decimal point; R30 = 0.30 µH). 6. **-R:** RoHS compliant indicator. --- ### 4. Applications This inductor is typically used in multi-phase buck converters for: * **Computing:** Server Vcore regulators, Desktop motherboards, and Graphics cards (GPUs). * **Networking:** Routers, switches, and high-speed data communications equipment. * **Industrial:** High-current Point-of-Load (PoL) converters.