### Overview of CTX20-1P-R The **CTX20-1P-R** is a high-performance power inductor belonging to the **OCTA-PAC®** series manufactured by **Eaton (formerly Cooper Bussmann)**. It is designed for high-density power applications, utilizing a toroidal core geometry to minimize electromagnetic interference (EMI). --- ### Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 19.9 µH (±20%) | | **Current Rating (Irms)** | 1.80 Amperes | | **Peak Current (Isat)** | 2.53 Amperes | | **DC Resistance (DCR)** | 0.081 Ohms (Max) | | **Core Material** | Powered Iron | | **Mounting Type** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +125°C | --- ### Key Features 1. **Toroidal Design:** The donut-shaped core ensures that the magnetic flux is contained within the core, significantly reducing EMI compared to traditional drum or rod cores. 2. **Dual Winding Capability:** The "1P" in the part number indicates a specific winding configuration (typically a single winding in this series, though the footprint often supports dual-winding variants for transformers). 3. **Low DCR:** The low DC resistance minimizes power loss through heat, making it highly efficient for battery-operated devices. 4. **Robust Construction:** The part is designed to withstand high-temperature reflow soldering processes and is RoHS compliant. --- ### Common Applications * **DC-DC Converters:** Used as an energy storage element in buck, boost, or buck-boost converters. * **EMI Filtering:** Utilized in power lines to suppress high-frequency noise. * **Computer Peripherals:** Found in motherboards and graphic cards for voltage regulation modules (VRMs). * **Industrial Controls:** Applied in power supplies for sensors and automation equipment. --- ### Footprint and Packaging The CTX20-1P-R features a **Size 1** OCTA-PAC footprint. It is typically supplied in Tape and Reel packaging for automated pick-and-place assembly. ---