## Detailed Overview: SD7030-820-R Power Inductor The **SD7030-820-R** is a high-performance, shielded surface-mount (SMD) power inductor. It is part of the SD7030 series manufactured by **Eaton (formerly Cooper Bussmann)**. These inductors are designed for applications requiring high power density and magnetic shielding to minimize Electromagnetic Interference (EMI). --- ### 1. Key Technical Specifications The part number "820" indicates the inductance value, and "R" signifies RoHS compliance. | Parameter | Specification | | :--- | :--- | | **Inductance** | 82 μH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~0.265 Ω (Typical) | | **Rated Current (Irms)** | ~0.82 A | | **Saturation Current (Isat)** | ~0.92 A | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 7.0mm x 7.0mm x 3.0mm | | **Shielding** | Magnetically Shielded | --- ### 2. Physical Construction & Design * **Core Material:** Ferrite drum core. * **Shielding:** The inductor features a ferrite sleeve that wraps around the winding. This "shielded" design traps the magnetic flux, preventing it from interfering with nearby sensitive components on the PCB. * **Footprint:** The 7030 designation refers to its dimensions (approx. 7.0mm width/length and 3.0mm height), making it a low-profile option for compact electronics. --- ### 3. Common Applications Due to its balance of inductance and current handling, the SD7030-820-R is typically used in: 1. **DC-DC Converters:** Buck, Boost, and SEPIC topologies. 2. **Energy Storage:** Filtering output current in switching power supplies. 3. **Consumer Electronics:** Laptops, tablets, and LED drivers. 4. **Industrial Equipment:** Distributed power systems and battery-powered devices. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **SD** | Series Code (Standard Inductor) | | **7030** | Size Dimensions (7.0 x 7.0 x 3.0 mm) | | **820** | Inductance Value (82 followed by 0 zeros = 82μH) | | **-R** | RoHS Compliant / Lead-Free | ---