The **SD6030-271-R** is a high-performance, shielded surface-mount (SMD) power inductor part of the SD6030 series manufactured by **Eaton (formerly Coiltronics)**. Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. General Specifications The part number itself follows a specific nomenclature that defines its physical and electrical properties. | Parameter | Value / Detail | | :--- | :--- | | **Inductance** | 270 µH | | **Tolerance** | ±20% | | **DCR (Direct Current Resistance)** | ~0.762 Ω (Typical) | | **Isat (Saturation Current)** | ~0.48 A | | **Irms (Heating Current)** | ~0.56 A | | **Shielding** | Magnetically Shielded | | **Dimensions** | 6.0mm x 6.0mm x 3.0mm | --- ### 2. Key Electronic Components & Materials * **Core Material:** Ferrite. Ferrite cores are used to provide high permeability while keeping eddy current losses low at high frequencies. * **Magnetic Shielding:** The component is enclosed in a magnetic shroud. This minimizes **Electromagnetic Interference (EMI)**, ensuring that the magnetic field does not interfere with neighboring sensitive components on the PCB. * **Winding:** Copper wire with a high-temperature coating, designed for durability and low resistance. * **Termination:** Lead-free (RoHS compliant) matte tin over copper plating for excellent solderability. --- ### 3. Performance Characteristics #### A. Saturation Current ($I_{sat}$) This is the current level at which the inductance drops by a specified percentage (usually 30%). For the **271-R**, the saturation occurs around **0.48A**. Exceeding this will cause the inductor to lose its properties and behave like a simple resistor/wire. #### B. RMS Current ($I_{rms}$) This represents the continuous DC current that will cause the component's temperature to rise by approximately 40°C above ambient. For this part, it is rated at **0.56A**. #### C. Self-Resonant Frequency (SRF) Because inductors have parasitic capacitance between the windings, they have a resonant frequency. The SD6030 series is optimized for DC-DC conversion ranges, typically operating efficiently up to several MHz. --- ### 4. Common Applications Due to its shielded nature and compact 6030 profile, it is commonly used in: * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Consumer Electronics:** Laptops, LED drivers, and handheld GPS units. * **Noise Filtering:** Used in power supply lines to filter out high-frequency ripple. ---