## Technical Overview: SD7030-300-R The **SD7030-300-R** is a high-performance, surface-mount (SMD) shielded power inductor manufactured by **Eaton (formerly Coiltronics)**. It is part of the SD7030 series, designed for applications requiring high power density and low electromagnetic interference (EMI). --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 30 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 1.34 Amperes | | **Saturation Current (Isat)** | 1.10 Amperes | | **DC Resistance (DCR)** | 0.126 Ohms (Max) | | **Shielding** | Magnetically Shielded | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Construction The "7030" designation refers to the physical dimensions of the component: * **Width/Length:** 7.0 mm x 7.0 mm * **Height:** 3.0 mm (Low profile) * **Material:** Ferrite core construction which provides high efficiency and low core losses. * **Shielding:** The magnetic shielding minimizes "stray" magnetic fields, preventing interference with nearby sensitive components on the PCB. --- ### 3. Applications and Usage This specific part is typically found in power management circuits where voltage needs to be stepped up or down efficiently. * **DC-DC Converters:** Used in Buck, Boost, and SEPIC topologies. * **Computing:** Power supplies for laptops, netbooks, and tablets. * **Consumer Electronics:** LED drivers, digital cameras, and portable media players. * **Battery Powered Systems:** Ideal due to its low DCR, which helps extend battery life by reducing heat loss. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **SD** | Product Series (Shielded Drum) | | **7030** | Dimensions (7.0 x 7.0 x 3.0 mm) | | **300** | Inductance Value (30 x 10^0 = 30 µH) | | **-R** | RoHS Compliant / Lead-Free | --- ### 5. Design Considerations When integrating the SD7030-300-R into a circuit, engineers must monitor the **Saturation Current (Isat)**. If the peak current exceeds 1.10A, the inductance will drop significantly (usually by 30%), which can lead to circuit instability or overheating.