## SD14-3R2-R Electronic Component Overview The **SD14-3R2-R** is a high-performance, low-profile power inductor manufactured by **Eaton (formerly Cooper Bussmann/Coiltronics)**. It is part of the SD series, which is designed for applications requiring high power density and magnetic shielding. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 3.2 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 2.21 Amps | | **Saturation Current (Isat)** | 2.58 Amps | | **DC Resistance (DCR)** | 45.4 mΩ (Max) | | **Package / Case** | 5.2mm x 5.2mm x 1.45mm | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Construction and Design The "SD" in the part number stands for **Shielded Drum**. The component features specific design choices to optimize performance in compact electronics: * **Magnetic Shielding:** The inductor is shielded to reduce Electromagnetic Interference (EMI), making it safe for use near sensitive components. * **Low Profile:** With a height of only **1.45mm**, it is ideal for thin devices like smartphones, tablets, and wearables. * **Ferrite Core:** Utilizes a ferrite core material that provides high efficiency and low core losses at high frequencies. --- ### 3. Part Number Breakdown The nomenclature for this part follows the Eaton/Coiltronics standard: | Segment | Meaning | | :--- | :--- | | **SD** | Series Name (Shielded Drum Inductor) | | **14** | Dimensional size (Approx. 5.2mm x 1.45mm) | | **3R2** | Inductance Value (3.2 Microhenries; 'R' acts as the decimal) | | **-R** | RoHS Compliant / Lead-Free | --- ### 4. Common Applications This inductor is typically found in DC-DC converter circuits where space is a premium. Specific uses include: * **Buck/Boost Converters:** Voltage regulation in battery-powered devices. * **LED Drivers:** Providing steady current for backlighting. * **IoT Modules:** Power management in small-scale wireless sensors. * **Handheld Medical Devices:** Where EMI must be strictly controlled. ---