The **SD52-2R2-R** is a high-performance, low-profile power inductor manufactured by **Eaton (formerly Coiltronics/Bussmann)**. It belongs to the SD52 series of surface-mount (SMD) shielded drum core inductors. --- ### ## 1. Key Specifications The following table highlights the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.033 Ω (Typical) | | **Saturation Current ($I_{sat}$)** | 2.72 A | | **RMS Current ($I_{rms}$)** | 2.50 A | | **Shielding** | Magnetically Shielded | | **Operating Temperature** | -40°C to +125°C | | **Dimensions** | 5.2mm x 5.2mm x 2.0mm | --- ### ## 2. Technical Features * **Magnetic Shielding:** The "SD" in the series stands for Shielded Drum. This reduces Electromagnetic Interference (EMI), making it suitable for high-density layouts where components are close to each other. * **Low Profile:** With a maximum height of 2.0mm, it is ideal for thin electronic devices like smartphones, tablets, and wearable tech. * **Ferrite Core Construction:** Provides high efficiency and high saturation current levels relative to its size. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with environmental regulations. --- ### ## 3. Common Applications The SD52-2R2-R is primarily used in power management circuits where voltage needs to be stepped up or down efficiently. 1. **DC-DC Converters:** Buck, Boost, and SEPIC topologies. 2. **Battery Powered Devices:** Due to its small footprint and high efficiency. 3. **Computer Peripherals:** Used in hard drives, motherboards, and video cards. 4. **LED Lighting:** Used in driver circuits to maintain steady current. --- ### ## 4. Marking Code Reference The component is often marked with a shorthand code for identification: ```text Top Marking: 2R2 Meaning: 2.2 Microhenries (µH) ```