The **SD12-100-R** is a high-performance, low-profile power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the SD Series of surface-mount (SMD) power inductors, specifically designed for applications requiring high power density and magnetic shielding. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics for the SD12-100-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 10.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.165 Ω (Typical) | | **Saturation Current ($I_{sat}$)** | 1.10 Amperes | | **RMS Current ($I_{rms}$)** | 1.05 Amperes | | **Operating Temperature** | -40°C to +125°C | | **Dimensions (Footprint)** | 5.2mm x 5.2mm x 1.2mm | --- ### 2. Physical Construction and Features The "SD12" designation provides specific information about its mechanical build: * **Magnetically Shielded:** The part is constructed with a ferrite drum core and a ferrite ring. This minimizes Electromagnetic Interference (EMI), making it safe to place near sensitive components. * **Low Profile:** The "12" in the name indicates a maximum height of approximately **1.2 mm**, making it ideal for ultra-thin electronics like smartphones or tablets. * **Construction:** It uses a high-temperature wire-wound design on a ferrite core to ensure stability under load. --- ### 3. Application Use-Cases The SD12-100-R is primarily used in power management circuits. Typical applications include: 1. **DC-DC Converters:** Used as a storage element in Buck (step-down) or Boost (step-up) converters. 2. **Portable Electronics:** Due to its height, it is used in handheld GPS units, digital cameras, and mobile accessories. 3. **Battery Powered Devices:** Ideal for circuits where efficiency and space-saving are critical. 4. **LED Drivers:** Used to regulate current in small-scale LED lighting systems. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **SD:** Product series (Inductor). * **12:** Dimensions (Approx 5.2mm width x 1.2mm height). * **100:** Inductance value. The first two digits are significant figures, the third is the multiplier ($10 \times 10^0 = 10$). Result is in µH. * **R:** Denotes RoHS compliance (Lead-free). ---