The **SD10-R47-R** is a high-performance, low-profile surface mount (SMD) power inductor. It is part of the SD series manufactured by **Eaton (formerly Bussmann/Coiltronics)**. These components are specifically designed for applications where space is limited and high efficiency is required. --- ### 1. Key Technical Specifications The part number "SD10-R47-R" encodes specific technical data: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.0271 Ohms (Max) | | **Saturation Current ($I_{sat}$)** | 2.48 Amps | | **RMS Current ($I_{rms}$)** | 2.16 Amps | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 5.2mm x 5.2mm x 1.0mm | --- ### 2. Breakdown of the Part Number * **SD**: Product Series (Shielded Drum Core). * **10**: Physical size/height code (approx. 1.0mm height). * **R47**: Inductance value (R represents the decimal point; $0.47$ µH). * **-R**: RoHS compliant (lead-free). --- ### 3. Core Features & Benefits * **Magnetic Shielding:** The inductor is shielded, meaning it produces very low Electromagnetic Interference (EMI). This is critical for densely packed circuit boards. * **Low Profile:** With a maximum height of 1.0mm, it is ideal for ultra-thin electronics like smartphones, tablets, and wearable tech. * **Ferrite Core Material:** Ensures high efficiency and low core losses at high frequencies. * **High Power Density:** Despite its small size, it can handle relatively high currents (up to 2.48A saturation). --- ### 4. Typical Applications The SD10-R47-R is primarily used in power management circuits, including: 1. **DC-DC Converters:** Used in "Buck" (step-down) or "Boost" (step-up) regulators. 2. **Battery Powered Devices:** Optimizes battery life due to low DC resistance. 3. **LED Drivers:** Provides stable current for backlighting in portable displays. 4. **Computer Peripherals:** Used on motherboards and graphic cards for local voltage regulation. --- ### 5. Recommended Footprint (Example) When designing a PCB (Printed Circuit Board), the landing pattern should follow the standard SD10 dimensions: ```markdown [ 5.2 mm ] +-----------+ | [PAD] | <-- Solder Pad 1 | | | Inductor| | Body | | | | [PAD] | <-- Solder Pad 2 +-----------+ ``` ---