## Overview of the SD10-2R2-R The **SD10-2R2-R** is a high-performance, low-profile power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the SD series of shielded drum core inductors, which are designed for applications where space is limited and electromagnetic interference (EMI) must be minimized. --- ### Technical Specifications The following table summarizes the primary electrical and physical characteristics of the SD10-2R2-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.0416 Ω (Typical) | | **Saturation Current ($I_{sat}$)** | 2.22 A | | **RMS Current ($I_{rms}$)** | 1.84 A | | **Shielding** | Magnetically Shielded | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | Non-standard SMD (approx. 5.2 x 5.2 x 1.0 mm) | --- ### Key Internal Components and Features 1. **Ferrite Drum Core**: The "brain" of the inductor. It uses a high-density ferrite material that allows for high energy storage in a very small footprint. 2. **Magnetic Shielding**: The inductor is enclosed in a ferrite sleeve. This "shield" prevents the magnetic field lines from interfering with nearby sensitive components and helps reduce audible noise. 3. **Flat-Wire / Low Profile Construction**: The "10" in the part number indicates a maximum height of **1.0 mm**. This makes it ideal for ultra-thin electronics like smartphones and tablets. 4. **Base Materials**: The part is halogen-free and RoHS compliant, utilizing lead-free solder for the terminations. --- ### Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **SD**: Series name (Shielded Drum Core). * **10**: Physical size/height code (1.0 mm height). * **2R2**: Inductance value. The "R" acts as a decimal point (2.2 µH). * **-R**: RoHS compliant suffix. --- ### Typical Applications Due to its high current handling and low profile, the SD10-2R2-R is commonly used in: * **DC-DC Converters**: Used as an energy storage element in buck or boost regulators. * **Mobile Devices**: Smartphones, wearable tech, and tablets. * **LED Drivers**: Providing constant current for display backlighting. * **Computer Peripherals**: Small form-factor hard drives and SSDs. ---