The **FP1308R2-R21-R** is a high-current, shielded drum core power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **FP1308 series**, which is specifically designed for high-frequency voltage regulator modules (VRMs). ### 1. Technical Specifications The following table summarizes the key electrical and physical parameters of this specific component: | Parameter | Value | | :--- | :--- | | **Inductance (L)** | 0.21 µH (Nominal) | | **Tolerance** | ±10% | | **Rated Current (Irms)** | 60 Amps | | **Saturation Current (Isat)** | 71 Amps | | **DC Resistance (DCR)** | 0.32 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Dimensions (L x W x H)** | 13.4 x 8.0 x 8.0 mm | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Core Features * **High Current Handling:** With a saturation current of 71A, it is designed for demanding power stages without losing inductance. * **Low DCR:** The extremely low DC resistance (0.32 mΩ) minimizes power loss and heat generation, leading to higher efficiency in power conversion. * **Magnetic Shielding:** The part is shielded to reduce Electromagnetic Interference (EMI), which is critical in dense PCB layouts. * **Halogen Free & RoHS Compliant:** Meets modern environmental standards for electronics manufacturing. --- ### 3. Common Applications This inductor is typically used in multi-phase buck converters where high current and high efficiency are required. * **Computing:** Server and desktop Voltage Regulator Modules (VRMs), CPU/GPU power delivery. * **Networking:** Hubs, routers, and high-end switches. * **Industrial:** High-current DC-DC converters for industrial automation. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **FP1308:** The series designation (size and form factor). * **R2:** Revision/Designator. * **R21:** Inductance value (R21 = 0.21 µH). * **-R:** RoHS compliant version.