The **2822HC40-RTR** typically refers to a high-performance, high-current power inductor, often used in DC-DC converters and voltage regulator modules (VRMs). This specific part number format is common for manufacturers like **Eaton (formerly Cooper/Bussmann)** under the Coiltronics brand. --- ### 1. Technical Specifications Below is a breakdown of the typical electronic characteristics for this series: | Property | Value (Typical) | | :--- | :--- | | **Inductance** | 0.40 µH (indicated by "40") | | **Current Rating (Isat)** | High Current (Approx. 30A - 50A+) | | **DCR (Direct Current Resistance)** | Extremely low (mΩ range) | | **Material** | Ferrite Core | | **Mounting Type** | Surface Mount (SMD) | | **Packaging** | RTR (Tape and Reel) | --- ### 2. Breakdown of the Part Number The alphanumeric code provides specific details about the component's construction: * **2822**: Refers to the physical dimensions/footprint of the inductor (approx. 7.1mm x 5.6mm). * **HC**: Stands for **High Current** capability, indicating it can handle significant power without saturating. * **40**: Represents the inductance value. In this naming convention, "40" usually signifies **0.40 µH**. * **RTR**: Indicates the packaging format, specifically **Tape and Reel** (Ready for automated pick-and-place assembly). --- ### 3. Key Electronic Functions Inductors like the 2822HC40-RTR serve three primary roles in electronic circuits: 1. **Energy Storage:** They store energy in a magnetic field during the "on" cycle of a switching regulator. 2. **Filtering:** They smooth out the ripple current from high-frequency switching, providing a stable DC output to sensitive components like CPUs or GPUs. 3. **EMI Suppression:** They help reduce electromagnetic interference (EMI) generated by high-speed switching power supplies. --- ### 4. Common Applications Due to its high current density and small footprint, this part is found in: * **Computing:** Server motherboards and graphics cards (VRM stages). * **Industrial:** High-efficiency point-of-load (POL) converters. * **Telecommunications:** Distributed power systems and base stations.