### SD20-6R2-R Electronic Component Overview The **SD20-6R2-R** is a high-performance, low-profile power inductor manufactured by **Eaton (formerly Bussmann)**. It belongs to the SD20 series, which is designed for applications requiring compact footprints and high power density. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 6.2 µH | | **Tolerance** | ±20% | | **Rated Current (Irms)** | 1.48 Amps | | **Saturation Current (Isat)** | 1.32 Amps | | **DC Resistance (DCR)** | 0.0894 Ohms (Max) | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetically Shielded | --- ### 2. Physical Characteristics * **Mounting Type:** Surface Mount (SMD/SMT). * **Dimensions:** Approximately 5.2mm x 5.2mm with a very low height of **2.0mm**. * **Construction:** Ferrite drum core with a magnetic epoxy shield to minimize Electromagnetic Interference (EMI). * **RoHS Status:** Compliant (indicated by the "-R" suffix). --- ### 3. Functional Details #### Magnetically Shielded Design The "SD" in the part number stands for **Shielded**, meaning the magnetic field is largely contained within the inductor. This is critical for high-density circuit boards where components are placed close together, as it prevents cross-talk and noise interference with sensitive nearby components. #### Performance Trade-offs The **SD20-6R2-R** is optimized for a balance between size and current handling. While it has a relatively low DCR (Direct Current Resistance) to minimize power loss as heat, its saturation current ($I_{sat}$) is the point where the inductance drops by 30%. Designers must ensure the peak circuit current does not exceed this value to avoid circuit instability. --- ### 4. Common Applications Due to its low profile and shielding, this part is typically found in: 1. **DC-DC Converters:** Used in "Buck" or "Boost" regulators to store and release energy. 2. **Portable Electronics:** Smartphones, tablets, and wearables where vertical space is limited. 3. **Computer Peripherals:** SSDs, network cards, and low-voltage power modules. 4. **LED Drivers:** Providing stable current for backlighting systems. ---