## Technical Overview of SD7030-271-R The **SD7030-271-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 electromagnetic interference (EMI) shielding. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 270 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.880 Ω (Typical) | | **Rated Current (Irms)** | 0.52 Amps | | **Saturation Current (Isat)** | 0.58 Amps | | **Operating Temperature** | -40°C to +125°C | | **Dimensions (L x W x H)** | 7.0mm x 7.0mm x 3.0mm | --- ### 2. Physical Construction & Features * **Shielded Design:** The component features a ferrite core construction that is magnetically shielded. This minimizes EMI, making it suitable for densely packed circuit boards where noise interference must be controlled. * **Form Factor:** The "7030" designation indicates its footprint (7.0 x 7.0 mm) and its low profile height (3.0 mm). * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with RoHS standards. * **Tape and Reel:** Typically supplied in tape and reel packaging for automated pick-and-place assembly. --- ### 3. Common Applications This specific inductor value (270 µH) is commonly used in power management circuits where stable energy storage and filtering are required: 1. **DC-DC Converters:** Used in buck, boost, and forward converters to smooth current ripples. 2. **LED Drivers:** Provides steady current for high-brightness LED applications. 3. **Battery Powered Devices:** Ideal for laptops, handheld instruments, and tablets due to its small size. 4. **Filtering:** Acts as a low-pass filter in power supply lines to remove high-frequency noise. --- ### 4. Part Number Breakdown To better understand the series, here is how the part number is structured: ```text SD 70 30 - 271 - R | | | | | | | | | └── RoHS Compliant | | | └── Inductance Code (27 + one zero = 270µH) | | └── Height (3.0 mm) | └── Footprint (7.0 mm x 7.0 mm) └── Series Name (Shielded Drum Inductor) ```