## Overview of UP3B-4R7-R The **UP3B-4R7-R** is a high-power, shielded surface-mount (SMD) power inductor. It belongs to the **UP3B series** manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). These inductors are specifically designed for high-density applications requiring low electromagnetic interference (EMI). --- ### Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 4.7 µH | | **Tolerance** | ±20% | | **Inductance Code** | 4R7 | | **DC Resistance (DCR)** | 0.0125 Ohms (Max) | | **RMS Current ($I_{rms}$)** | 6.5 Amps | | **Saturation Current ($I_{sat}$)** | 9.0 Amps | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Shielded (Drum Core) | --- ### Key Features 1. **Magnetic Shielding:** The ferrite drum core is wrapped in a way that minimizes magnetic flux leakage, which is critical for preventing interference with nearby sensitive components. 2. **High Power Density:** Despite its relatively small footprint (approx. 19.3mm x 13.3mm), it handles high saturation currents ($I_{sat}$), making it ideal for robust power supplies. 3. **Low DCR:** The low direct-current resistance ensures minimal energy loss as heat, increasing the overall efficiency of the power circuit. 4. **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with environmental regulations. --- ### Common Applications The UP3B-4R7-R is primarily used in power conversion circuits where high efficiency and low noise are required: * **DC-DC Converters:** Used as energy storage elements in buck (step-down) or boost (step-up) converters. * **Voltage Regulator Modules (VRMs):** Found in servers and high-performance computing power stages. * **Industrial Electronics:** Used in battery-powered equipment and distributed power systems. * **Consumer Electronics:** High-end audio systems or telecommunication base stations. --- ### Footprint Information (Approximate) ```markdown Dimensions: Length: 19.30 mm Width: 13.31 mm Height: 6.83 mm ``` ---