The **HC3-2R2-R** is a high-current, low-profile power inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the HC3 family, which is specifically designed for high-density power conversion applications. --- ## 1. Technical Specifications The part number "2R2" indicates its inductance value, while the "R" suffix denotes RoHS compliance. | Parameter | Specification | | :--- | :--- | | **Inductance** | 2.2 µH | | **Current Rating (Irms)** | ~19.0 A (Typical) | | **Saturation Current (Isat)** | ~21.0 A (Typical) | | **DC Resistance (DCR)** | ~3.3 mΩ | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | Surface Mount (SMD) | | **Dimensions** | Approx. 11.4mm x 11.4mm x 6.0mm | --- ## 2. Key Features * **High Current Capability:** Designed to handle significant current without saturating quickly. * **Low DCR:** The very low DC resistance minimizes power loss and heat generation, increasing overall system efficiency. * **Magnetic Shielding:** The powder iron core material provides inherent shielding, which reduces Electromagnetic Interference (EMI) with surrounding components. * **Robust Construction:** Its physical design is optimized for high-vibration environments and stable mounting. --- ## 3. Applications and Usage This component is typically found in the power stages of modern electronics where high efficiency is critical. ### Common Use Cases: 1. **Multi-phase Buck Converters:** Used in VRMs (Voltage Regulator Modules) for CPUs and GPUs. 2. **DC-DC Converters:** Found in distributed power systems and point-of-load (POL) regulators. 3. **Industrial Electronics:** Used in high-current power supplies and battery-powered equipment. 4. **Telecommunications:** Integral to base station power modules. --- ## 4. Part Number Breakdown The nomenclature for this series follows a specific logic: ```text HC3 - 2R2 - R | | | | | +-- RoHS Compliant | +-------- Inductance Value (2R2 = 2.2 microhenries) +-------------- Product Series (High Current, Size 3) ```