### Overview of the HC9-1R5-R The **HC9-1R5-R** is a high-current, low-profile power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the HC9 series, which is specifically designed for high-density power conversion applications. --- ### Technical Specifications Below are the primary electrical and physical characteristics of the HC9-1R5-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 1.5 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 18.2 Amperes | | **Saturation Current (Isat)** | 26.5 Amperes | | **DC Resistance (DCR)** | 2.5 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) | | **Dimensions** | ~13.0mm x 13.0mm x 9.0mm | --- ### Key Features 1. **High Current Capability**: Designed to handle significant current loads with minimal heating due to its very low DC resistance. 2. **Magnetic Shielding**: The inductor is shielded, which minimizes electromagnetic interference (EMI) with surrounding components on the PCB. 3. **Low Core Loss**: It utilizes powdered iron core material, which provides stable performance even at high frequencies. 4. **RoHS Compliant**: The "-R" suffix indicates that the part is lead-free and meets RoHS environmental standards. --- ### Applications The HC9-1R5-R is commonly integrated into the following systems: * **DC-DC Converters**: Used in buck, boost, or buck-boost topologies. * **Voltage Regulator Modules (VRMs)**: Essential for providing stable power to CPUs and GPUs. * **Industrial Computing**: Used in high-power servers and networking equipment. * **Distributed Power Systems**: Managing power rails in complex electronic assemblies. --- ### Equivalent Circuit / Schematic Representation In a circuit diagram, the part is represented as a standard inductor with its specific values: ```spice * HC9-1R5-R Simplified Model L1 NodeA NodeB 1.5uH R_series NodeB NodeC 2.5mOhm ; Internal DC Resistance ``` ---