The **SD14-471-R** is a high-performance, low-profile power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the SD14 series, which is specifically designed for applications requiring compact footprints and high power density. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the SD14-471-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 470 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 4.88 Ohms (Typical) | | **Saturation Current ($I_{sat}$)** | 0.176 Amps | | **RMS Current ($I_{rms}$)** | 0.222 Amps | | **Operating Temperature** | -40°C to +125°C | | **Package/Case** | SMD (Surface Mount Device) | | **Dimensions** | 5.2mm x 5.2mm x 1.45mm | --- ### 2. Key Features * **Low Profile:** With a maximum height of 1.45mm, it is ideal for ultra-thin electronics like smartphones, tablets, and wearables. * **Magnetic Shielding:** The part is ferrite-shielded, which minimizes Electromagnetic Interference (EMI) with surrounding components. * **Construction:** It features a ferrite drum core and a ferrite sleeve, providing a closed magnetic path. * **RoHS Compliant:** The "-R" suffix indicates that the part is Lead-Free and compliant with RoHS standards. --- ### 3. Application Use Cases Due to its high inductance (470 µH) and low current rating, this component is typically used in signal conditioning or low-power conversion: 1. **DC-DC Converters:** Specifically in "Buck" (step-down) or "Boost" (step-up) converters for small handheld devices. 2. **LED Drivers:** Used to stabilize current in low-power lighting circuits. 3. **Battery Powered Equipment:** Its small footprint helps save board space in portable medical or IoT devices. 4. **Filtering:** Used in noise filtering circuits to smooth out ripples in power supplies. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **SD14:** Series identifier (Surface Mount, 1.4mm height class). * **471:** Inductance code ($47 \times 10^1 = 470$ µH). * **R:** RoHS compliant.