The **SD10-680-R** is a high-performance, low-profile **power inductor** manufactured by Eaton (formerly Cooper Bussmann). It is part of the SD series, widely used in DC-DC converters and power management circuits. --- ## 1. Technical Specifications The part number encodes specific characteristics of the component. Below is a breakdown of its electrical and physical properties: | Parameter | Specification | | :--- | :--- | | **Inductance** | 68.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.941 Ω (Typical) | | **Saturation Current ($I_{sat}$)** | 0.435 A (435 mA) | | **RMS Current ($I_{rms}$)** | 0.443 A (443 mA) | | **Shielding** | Magnetically Shielded | | **Package Size** | 5.2mm x 5.2mm x 1.0mm | --- ## 2. Key Internal Features ### A. Magnetic Shielding The "SD" series features a **shielded construction**. This is critical for high-density PCB layouts because it minimizes electromagnetic interference (EMI) with neighboring components. ### B. Low Profile Design The "10" in the part number indicates a maximum height of only **1.0 mm**. This makes it ideal for: * Smartphones and tablets. * Wearable electronics. * Ultra-thin laptop modules. ### C. Ferrite Core It utilizes a ferrite core material that provides high efficiency and low core losses at high frequencies, typically suitable for switching frequencies up to several MHz. --- ## 3. Part Number Breakdown Understanding the suffix and prefix: * **SD**: Shielded Drum Core inductor series. * **10**: Indicates the height (approx. 1.0 mm). * **680**: The inductance value in Microhenries ($\mu H$). The first two digits are significant figures, and the third is the multiplier (68 x $10^0$ = 68). * **-R**: Indicates that the part is **RoHS compliant**. --- ## 4. Common Applications Due to its balance of inductance and small footprint, the SD10-680-R is commonly found in: 1. **Buck/Boost Converters:** Stepping voltage up or down in battery-powered devices. 2. **LED Drivers:** Providing constant current for backlighting. 3. **Noise Filtering:** Acting as a low-pass filter in power supply lines to smooth out ripples.