## Technical Overview of SD10-471-R The **SD10-471-R** is a high-performance, low-profile power inductor manufactured by **Eaton (formerly Bussmann/Coiltronics)**. It is part of the SD10 series, designed specifically for space-constrained electronic circuits that require efficient power conversion. --- ### 1. Key Technical Specifications The part number "471" identifies its nominal inductance value, while the "R" indicates RoHS compliance. | Parameter | Specification | | :--- | :--- | | **Inductance** | 470 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 4.67 Ω (Typical) | | **Rated Current (Irms)** | 0.178 Amps | | **Saturation Current (Isat)** | 0.218 Amps | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | Surface Mount (SMD) | --- ### 2. Physical Construction The SD10 series is known for its **shielded drum core** construction. * **Magnetic Shielding:** The inductor is magnetically shielded, which minimizes Electromagnetic Interference (EMI). This is crucial for dense PCB layouts where components are placed close together. * **Dimensions:** It features a very low profile, typically around **1.0 mm in height**, making it ideal for ultra-thin devices like smartphones or tablets. * **Ferrite Core:** Utilizes a ferrite core material that provides high efficiency and low core losses at high switching frequencies. --- ### 3. Typical Applications The SD10-471-R is commonly integrated into the following systems: 1. **DC-DC Converters:** Used as an energy storage element in buck, boost, or buck-boost regulators. 2. **Portable Electronics:** Ideal for digital cameras, mobile phones, and handheld GPS units due to its small footprint. 3. **LED Drivers:** Used in backlighting circuits for displays. 4. **Battery Powered Systems:** Its low DCR helps in preserving battery life by reducing power dissipation. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in selecting alternatives: * **SD:** Series name (Shielded Drum). * **10:** Size/Power rating code (approx. 1.0mm height). * **471:** Inductance code ($47 \times 10^1 = 470$ microhenries). * **R:** RoHS compliant / Lead-free. ---