The **HC9-R20-R** is a high-current, power inductor typically manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the HC9 series, which is designed for high-density, high-current applications where low power loss and reliability are critical. --- ### ## 1. Technical Specifications The part number follows a specific nomenclature. Here is a breakdown of the technical profile for the `HC9-R20-R`: | Parameter | Value / Description | | :--- | :--- | | **Inductance** | 0.20 µH (Microhenries) | | **Current Rating (Irms)** | ~52 Amps (Approximate) | | **Peak Current (Isat)** | ~80+ Amps (Saturation point) | | **DC Resistance (DCR)** | Extremely Low (typically < 0.6 mΩ) | | **Core Material** | Powdered Iron (High frequency/low loss) | | **Mounting Type** | Surface Mount (SMD) | | **Operating Temp** | -40°C to +125°C | --- ### ## 2. Key Features * **High Current Handling:** Designed to manage high peak currents without saturating quickly. * **Low DCR:** The very low DC resistance minimizes "I²R" power losses, reducing heat generation in the circuit. * **Magnetic Shielding:** The construction minimizes Electromagnetic Interference (EMI), which is vital for compact electronic assemblies. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and meets environmental standards. --- ### ## 3. Common Applications Due to its high current capacity and low inductance, the HC9-R20-R is primarily found in: 1. **Voltage Regulator Modules (VRMs):** Used in CPU/GPU power delivery on motherboards. 2. **DC-DC Converters:** Found in point-of-load (POL) power supplies. 3. **Industrial Computing:** Power stages for high-performance servers and workstations. 4. **Renewable Energy:** High-efficiency power inverters and solar converters. --- ### ## 4. Physical Dimensions (Typical HC9) The HC9 series shares a standard footprint to ensure compatibility with high-density PCB layouts: * **Length:** ~13.0 mm * **Width:** ~13.0 mm * **Height:** ~9.0 mm --- ### ## 5. Part Number Decoding ```text HC9 - R20 - R | | | | | +-- RoHS Compliant | +-------- Inductance Value (R20 = 0.20 µH) +-------------- Series Name (High Current, Size 9) ```