The **SD53-470-R** is a specific model of a surface-mount (SMD) power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the SD53 series, which is characterized by its shielded construction and compact footprint. --- ## 1. Component Identification The part number can be broken down to understand its physical and electrical characteristics: | Part Segment | Meaning | Details | | :--- | :--- | :--- | | **SD** | Series Name | Shielded Drum Inductor | | **5** | Footprint Size | Approximately 5.2mm x 5.2mm | | **3** | Height Profile | Approximately 3.0mm max height | | **470** | Inductance Value | 47 $\mu$H (47 followed by 0 zeros) | | **-R** | RoHS Compliant | Lead-free and environmentally compliant | --- ## 2. Key Technical Specifications Below are the typical electrical parameters for this specific component: | Parameter | Value | | :--- | :--- | | **Inductance** | 47 $\mu$H | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~0.290 $\Omega$ (Max) | | **Rated Current ($I_{rms}$)** | ~0.82 Amperes | | **Saturation Current ($I_{sat}$)** | ~0.72 Amperes | | **Operating Temperature** | -40°C to +125°C | --- ## 3. Structural Features ### Shielded Construction The "Shielded" nature means the inductor is encased in a ferrite material. This serves two primary purposes: 1. **EMI Reduction:** It confines the magnetic flux within the component, preventing interference with neighboring circuits. 2. **Efficiency:** It improves the magnetic coupling of the coil. ### Form Factor The SD53 series uses a **Drum Core** design. It is optimized for high power density, meaning it can handle relatively high currents despite its small 5x5mm surface area. --- ## 4. Common Applications This inductor is generally found in DC-DC converter circuits where space is limited. Typical uses include: * **Buck/Boost Converters:** Stepping voltage up or down in portable electronics. * **LED Drivers:** Providing constant current for lighting. * **Battery Powered Devices:** Used in tablets, digital cameras, and IoT sensors due to its low profile. * **Computer Peripherals:** Localized power regulation on motherboards or expansion cards. ---