### Overview of HCF1305-1R8-R The **HCF1305-1R8-R** is a high-current, shielded power inductor designed by Eaton (formerly Cooper Bussmann). It belongs to the HCF series, which is specifically engineered for high-frequency, high-current power conversion applications where efficiency and thermal management are critical. --- ### Technical Specifications The following table outlines the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 1.8 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 22 Amps | | **Saturation Current (Isat)** | 35 Amps | | **DC Resistance (DCR)** | 1.83 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | SMD (13.0mm x 12.7mm x 5.0mm) | | **Material Core** | Ferrite | --- ### Key Features and Construction 1. **Shielded Construction**: The inductor is magnetically shielded. This minimizes Electromagnetic Interference (EMI) with surrounding components on the PCB, making it ideal for dense layouts. 2. **High Current Handling**: Due to its ferrite core and flat wire design, it can handle significant DC currents without entering deep saturation, maintaining stability under load. 3. **Low DCR (DC Resistance)**: With a resistance of only 1.83 mΩ, it minimizes power loss due to heat (I²R losses), leading to higher overall system efficiency. 4. **Halogen Free & RoHS Compliant**: Meets modern environmental safety standards for lead-free soldering processes. --- ### Common Applications The HCF1305-1R8-R is typically found in the following electronic systems: * **Voltage Regulator Modules (VRMs)**: Used in CPUs and GPUs for servers and workstations. * **DC-DC Converters**: High-frequency buck, boost, or buck-boost converters. * **Point-of-Load (PoL) Modules**: Used to step down voltage locally on a motherboard. * **Battery Powered Systems**: Where efficiency is vital for extending battery life. --- ### Comparison with Similar Parts | Feature | HCF1305-1R0-R | HCF1305-1R8-R | HCF1305-2R2-R | | :--- | :--- | :--- | :--- | | **Inductance** | 1.0 µH | 1.8 µH | 2.2 µH | | **Isat (Amps)** | 55 A | 35 A | 32 A | | **DCR (mΩ)** | 0.85 | 1.83 | 1.83 |