The **SWC63I-R39K** is a specific surface-mount (SMD) power inductor. This component is designed to store energy in a magnetic field and is typically used for power management and noise filtering in electronic circuits. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. Part Number Breakdown The nomenclature for these types of inductors usually follows a specific pattern: | Component Segment | Description | Meaning | |:---|:---|:---| | **SWC** | Series Prefix | Wire-wound shielded inductor series. | | **63I** | Dimensions | Typically refers to the footprint (approx. 6.2 x 6.2 mm). | | **R39** | Inductance Value | 0.39 Microhenries (µH). | | **K** | Tolerance | ±10% variation from the nominal value. | --- ### 2. Technical Specifications While exact values can vary slightly by manufacturer (such as Sunlord or similar brands), the typical specs for a **R39K** high-current inductor are as follows: * **Inductance:** 0.39 µH. * **Tolerance:** ±10%. * **DC Resistance (DCR):** Extremely low (often < 10 mΩ) to minimize power loss. * **Saturation Current (Isat):** The current at which inductance drops by a specific percentage. Usually high in this series (approx. 5A - 10A depending on core material). * **Operating Temperature:** Typically -40°C to +125°C. --- ### 3. Key Electronic Features * **Magnetic Shielding:** The "I" or "S" designations in these series often imply a shielded construction. This prevents electromagnetic interference (EMI) from affecting nearby components. * **Low Profile:** Designed for compact PCB layouts in consumer electronics. * **High Current Handling:** Due to the low inductance value (0.39µH), this part is optimized for high-frequency switching and high current throughput. --- ### 4. Common Applications This part is most frequently found in the following circuit types: 1. **DC-DC Converters:** Used as the main energy storage element in buck or boost converters. 2. **Voltage Regulator Modules (VRM):** Found near CPUs or GPUs to manage high-current power rails. 3. **Noise Filtering:** Used in power supply lines to suppress high-frequency ripples. ---