## Overview: SD7030-7R3-R The **SD7030-7R3-R** is a high-performance, surface-mount (SMD) power inductor part of the SD7030 series manufactured by **Eaton (formerly Bussmann)**. It is specifically designed for applications requiring high power density and energy efficiency in a compact footprint. --- ### 1. Key Technical Specifications The part number itself reveals several characteristics about the component's performance: | Feature | Specification | | :--- | :--- | | **Inductance** | 7.3 µH | | **Tolerance** | ±20% | | **Rated Current (Irms)** | 3.14 Amps (Typical) | | **Saturation Current (Isat)** | 2.52 Amps (Typical) | | **DC Resistance (DCR)** | 31.0 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Dimensions** | 7.0mm x 7.0mm x 3.0mm | --- ### 2. Component Construction * **Shielding:** It is a **shielded** inductor. This means it has a magnetic core that encloses the coil, significantly reducing electromagnetic interference (EMI) which could affect nearby sensitive components. * **Core Material:** Typically utilizes a ferrite core designed for low core losses at high frequencies. * **Termination:** Features RoHS compliant, lead-free solder-plated terminals for reliable surface mount assembly. --- ### 3. Common Applications Due to its low profile (3.0mm height) and high current handling, the SD7030-7R3-R is commonly found in: 1. **DC-DC Converters:** Used as the energy storage element in buck, boost, or SEPIC converters. 2. **Portable Electronics:** Ideal for laptops, tablets, and handheld devices where board space and height are limited. 3. **LED Drivers:** Provides stable current regulation for lighting circuits. 4. **Computer Peripherals:** Used in power management modules for SSDs and graphic cards. --- ### 4. Part Number Breakdown * **SD:** Series name (Shielded Drum Inductor). * **7030:** Physical size (7.0mm x 7.0mm footprint, 3.0mm height). * **7R3:** Inductance value (7.3 microhenries; the 'R' acts as a decimal point). * **-R:** RoHS compliant designation. ---