The **HC1-R22-R** is a high-current, power inductor typically manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **HC1 series**, which is designed for high-frequency energy storage and filtering. --- ### 1. Technical Specifications The part number contains specific encoded information about its electrical characteristics: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.22 µH (R22 denotes the decimal point) | | **Current Rating (Irms)** | Approximately 33A to 51A (depending on temp rise) | | **Peak Current (Isat)** | ~80A (Saturation current) | | **DC Resistance (DCR)** | ~0.52 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package/Case** | HC1 (Surface Mount, ~13.8mm x 13.0mm) | --- ### 2. Key Features * **High Current Density:** Designed to handle very high saturation currents with minimal power loss. * **Low DCR:** The use of flat wire or heavy gauge copper ensures extremely low direct current resistance, reducing heat generation. * **Magnetic Shielding:** The powder iron core material provides inherent shielding, reducing Electromagnetic Interference (EMI). * **Frequency Range:** Optimized for high-frequency applications (up to 2 MHz and beyond). --- ### 3. Construction and Material The "R" suffix indicates that the part is **RoHS compliant**. * **Core Material:** Iron powder core (offers "soft" saturation characteristics, meaning the inductance doesn't drop off instantly when current increases). * **Terminations:** 100% Matte Tin over Copper. --- ### 4. Common Applications Due to its high current capacity and small footprint, the HC1-R22-R is found in: 1. **Voltage Regulator Modules (VRMs):** Used in CPU and GPU power delivery on motherboards. 2. **DC-DC Converters:** High-efficiency buck/boost converters. 3. **Distributed Power Systems:** For telecommunications and industrial servers. 4. **Filter Inductors:** Smoothing output ripples in high-current power supplies. --- ### 5. Part Number Breakdown * **HC1:** Series name (High Current, Size 1). * **R22:** Inductance value (R = decimal point; 0.22 microhenries). * **R:** RoHS compliant.