The **SD7030-561-R** is a high-performance, shielded surface-mount (SMD) power inductor part of the SD7030 series, originally manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). --- ## 1. Technical Specifications The part number "561" indicates its inductance value, and the "R" indicates RoHS compliance. | Parameter | Value | | :--- | :--- | | **Inductance** | 560 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 1.34 Ω (Typical) | | **Current Rating (Irms)** | 0.38 Amps | | **Saturation Current (Isat)** | 0.35 Amps | | **Operating Temperature** | -40°C to +125°C | | **Dimensions** | 7.0mm x 7.0mm x 3.0mm | --- ## 2. Key Features ### A. Magnetic Shielding The component is "shielded," meaning it is encased in a ferrite material that contains the magnetic flux. This minimizes Electromagnetic Interference (EMI) with neighboring components on the PCB, which is critical for dense circuit designs. ### B. Low Profile With a maximum height of 3.0mm, it is designed for compact electronic devices where vertical space is limited. ### C. Construction * **Core:** Ferrite material. * **Termination:** Tin-plated copper, suitable for lead-free reflow soldering. * **Shape:** Square base with a circular top (typical for the SD7030 series). --- ## 3. Common Applications This inductor is typically used in power management circuits where high inductance is required at lower current levels. * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Filtering:** Used in power lines to smooth ripples and reduce noise. * **Battery Powered Devices:** Laptops, handheld instruments, and IoT sensors. * **LED Drivers:** Providing stable current for lighting applications. --- ## 4. Part Number Breakdown Understanding the nomenclature helps in selecting alternatives: 1. **SD:** Series name (Shielded Drum). 2. **7030:** Dimensions (approx. 7.0mm width/length and 3.0mm height). 3. **561:** Inductance code ($56 \times 10^1$ = 560µH). 4. **R:** RoHS compliant (Lead-free).