### Overview of HCF1305-1R0-R The **HCF1305-1R0-R** is a high-current, magnetically shielded power inductor designed by Eaton (formerly Cooper Bussmann). It is specifically engineered for high-frequency DC-DC converters and power supplies where space and efficiency are critical. --- ### Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 1.0 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 32 Amps | | **Saturation Current (Isat)** | 55 Amps | | **DC Resistance (DCR)** | 1.3 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 13.5mm x 13.0mm x 5.0mm | --- ### Core Characteristics #### 1. Material & Construction * **Ferrite Core:** This part uses a high-density ferrite core material, which provides low core losses at high switching frequencies. * **Magnetic Shielding:** The component is magnetically shielded to minimize Electromagnetic Interference (EMI), making it suitable for densely packed PCBs. * **Flat Wire Design:** It often utilizes flat wire windings to reduce the DC resistance (DCR) and improve thermal performance. #### 2. Performance Benefits * **High Saturation Current:** With an `Isat` of 55A, the inductor can handle large current spikes without the inductance dropping significantly. * **Low DCR:** At only 1.3 mΩ, power loss due to heat (I²R loss) is minimized, increasing the overall efficiency of the power circuit. * **Halogen Free:** Compliant with modern environmental standards (RoHS and Halogen Free). --- ### Typical Applications The HCF1305-1R0-R is commonly found in the following electronic systems: * **Voltage Regulator Modules (VRM):** Used in servers and desktop computers. * **Multi-phase Regulators:** For powering high-end CPUs and GPUs. * **Industrial Power Supplies:** Where high reliability and high current density are required. * **Solar Inverters:** Used in the DC-DC conversion stages. --- ### Mechanical Dimensions The "1305" in the part number indicates the approximate footprint: * **Length:** 13.5 mm * **Width:** 13.0 mm * **Height:** 5.0 mm (Max)