The **HC2-R47-R** is a high-current, power inductor typically manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **HC2 series**, which is designed for high-frequency, high-current applications where space and efficiency are critical. --- ### 1. Key Technical Specifications The part number "HC2-R47-R" can be broken down to understand its primary characteristics: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.47 µH (microhenries) | | **Current Rating (Irms)** | Approximately 33 Amps | | **Saturation Current (Isat)** | Approximately 44 Amps | | **DC Resistance (DCR)** | ~0.84 mΩ (milliohms) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | Surface Mount (SMD) | | **Material** | Powdered iron core (low loss) | --- ### 2. Physical Characteristics The "HC2" series is known for its **High Current** capability and robust construction: * **Dimensions:** It usually measures roughly 13.5mm x 13.0mm with a height of about 6.0mm. * **Core Material:** Uses a pressed iron powder core which provides excellent saturation characteristics (it doesn't "snap" off or lose inductance suddenly when current increases). * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with RoHS standards. --- ### 3. Common Applications Due to its high current handling and low DCR, the HC2-R47-R is commonly found in: * **Voltage Regulator Modules (VRMs):** Used in CPUs and GPUs for stable power delivery. * **DC-DC Converters:** High-frequency switching power supplies. * **Multi-phase Regulators:** Where multiple inductors are used in parallel to handle massive currents. * **Telecommunications:** Base station power modules and networking equipment. --- ### 4. Why Use the HC2-R47-R? 1. **Low Power Loss:** The extremely low DC resistance (DCR) minimizes heat generation through copper losses. 2. **Soft Saturation:** Unlike ferrite cores that lose inductance sharply, this powder core loses inductance gradually, making the circuit more stable under heavy loads. 3. **High Frequency:** Designed to perform efficiently at switching frequencies up to and exceeding 1 MHz.