## Analysis of the SD10-820-R Inductor The **SD10-820-R** is a specific electronic component belonging to the **SD series** of low-profile, shielded drum core power inductors manufactured by **Eaton (formerly Cooper Bussmann)**. It is primarily used for power management in compact electronic devices. --- ### 1. Technical Specifications The part number "SD10-820-R" contains encoded information about its electrical characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 82.0 µH | The nominal inductance value. | | **Tolerance** | ±20% | The allowable variance from the nominal inductance. | | **DC Resistance (DCR)** | 1.48 Ω (Typ) | The internal resistance at 20°C. | | **Rated Current ($I_{rms}$)** | 0.44 A | The current that causes a 40°C temperature rise. | | **Saturation Current ($I_{sat}$)** | 0.46 A | The current at which inductance drops by 30%. | | **Operating Temp** | -40°C to +125°C | The functional temperature range. | | **Shielding** | Ferrite Shielded | Minimizes Electromagnetic Interference (EMI). | --- ### 2. Physical Dimensions The SD10 series is known for its small footprint, making it ideal for high-density circuit boards. * **Footprint:** 5.2 mm x 5.2 mm * **Height:** 1.0 mm (Max) * **Mounting Type:** Surface Mount (SMD) --- ### 3. Key Features & Applications #### Features * **Low Profile:** The 1.0mm height is critical for ultra-thin electronics like smartphones or wearable tech. * **Magnetic Shielding:** The ferrite drum core is wrapped in a way that contains the magnetic field, reducing interference with nearby components. * **RoHS Compliant:** The "-R" suffix indicates compliance with lead-free environmental standards. #### Common Applications 1. **DC-DC Converters:** Used in buck, boost, and SEPIC converters. 2. **Portable Electronics:** Tablets, digital cameras, and mobile phones. 3. **LED Drivers:** Providing stable current for backlighting. 4. **Computer Peripherals:** Small-form-factor storage drives and networking cards. --- ### 4. Schematic Representation In a circuit diagram, the SD10-820-R is represented as a standard inductor, often with two parallel lines above the coil symbol to indicate the ferrite core. ```text L1 (SD10-820-R) ----(XXXXX)---- 82uH ```