### Technical Overview of HC3-1R0-R The **HC3-1R0-R** is a high-current, low-profile power inductor manufactured by **Eaton (formerly Coiltronics)**. It is part of the HC3 series, designed specifically for high-frequency power conversion applications. --- ### Key Specifications | Feature | Specification | | :--- | :--- | | **Inductance** | 1.0 µH (Microhenry) | | **Tolerance** | ±20% | | **Current Rating (Irms)** | ~25 Amps (Temperature rise dependent) | | **Saturation Current (Isat)** | ~28 Amps | | **DC Resistance (DCR)** | ~1.6 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### Core Construction and Materials 1. **Magnetic Material:** It uses a high-density powdered iron core. This material is chosen for its stable saturation characteristics and low core losses at high frequencies. 2. **Flat-Wire Design:** Unlike standard round-wire inductors, the HC3 series often utilizes flat-wire windings. This reduces "Skin Effect" and allows for a lower **DC Resistance (DCR)**, which minimizes heat generation during high current flow. 3. **Shielding:** The part is magnetically shielded to minimize Electromagnetic Interference (EMI) with surrounding components on the PCB. --- ### Typical Applications Due to its high current handling and small footprint, the HC3-1R0-R is commonly found in: * **DC-DC Converters:** Used as an output filter inductor. * **Voltage Regulator Modules (VRMs):** Found in CPU and GPU power delivery systems. * **Industrial Power Supplies:** For high-efficiency energy conversion. * **Battery Powered Systems:** Where low DCR is critical to preserving battery life. --- ### Physical Dimensions The "HC3" designation refers to a specific package size: * **Footprint:** Approximately 11.5mm x 10.5mm. * **Height:** Approximately 4.0mm.