The **SD14-470-R** is a high-performance, low-profile power inductor manufactured by Eaton (formerly Bussmann). It belongs to the SD14 series, which is characterized by its shielded drum core construction, designed for high-density applications where electromagnetic interference (EMI) must be minimized. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the SD14-470-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 47.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.443 Ω (Typical) | | **Saturation Current ($I_{sat}$)** | 0.636 Amps | | **RMS Current ($I_{rms}$)** | 0.730 Amps | | **Operating Temperature** | -40°C to +125°C | | **Size / Dimension** | 5.20mm x 5.20mm x 1.45mm | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Functional Features * **Magnetic Shielding:** The "SD" in the series stands for Shielded Drum. This means the magnetic field is contained within the component, preventing interference with neighboring components on a crowded PCB. * **Low Profile:** With a height of only 1.45mm, it is ideal for ultra-thin electronics like smartphones, wearables, and slim IoT devices. * **Ferrite Core Material:** Provides high efficiency and low core losses at high switching frequencies. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and meets RoHS environmental standards. --- ### 3. Common Applications The SD14-470-R is typically used in power management circuits, including: 1. **DC-DC Converters:** Used as the energy storage element in buck (step-down) or boost (step-up) converters. 2. **Handheld Electronics:** Due to its small footprint and low profile, it is found in mobile phones, tablets, and digital cameras. 3. **LED Drivers:** Used to regulate current in lighting applications. 4. **Computer Peripherals:** Found in hard drives (HDDs) and solid-state drives (SSDs). --- ### 4. Part Number Breakdown Understanding the nomenclature helps in selecting variations: * **SD14**: Series name (Shielded Drum, 1.4mm height class). * **470**: Inductance value code (47 + 0 zeros = 47.0 µH). * **-R**: RoHS compliant.