### Overview of UP2B-680-R The **UP2B-680-R** is a high-performance power inductor manufactured by **Eaton (formerly Bussmann)**. It belongs to the **Uni-Pac (UP)** series, which is specifically designed for surface-mount applications requiring high energy storage and low electromagnetic interference (EMI). --- ### Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 68 µH | | **Tolerance** | ±20% | | **Current Rating (Isat)** | ~1.31 Amps (Saturation Current) | | **Current Rating (Irms)** | ~1.24 Amps (Temperature Rise Current) | | **DC Resistance (DCR)** | 0.228 Ohms (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | Non-Standard SMD (Approx. 13.9mm x 9.4mm) | --- ### Key Features and Construction 1. **Magnetic Shielding:** The inductor is constructed with a ferrite core that provides a closed magnetic path. This minimizes EMI, making it ideal for densely packed circuit boards where noise could interfere with nearby sensitive components. 2. **Drum Core Technology:** It utilizes a ruggedized drum core design which allows for high current carrying capacity relative to its physical size. 3. **Material Composition:** The "-R" suffix indicates that the part is **RoHS compliant**, meaning it is lead-free and environmentally friendly. 4. **Durability:** The component is designed to handle high-frequency switching and provides excellent thermal stability under load. --- ### Common Applications * **DC-DC Converters:** Used as energy storage elements in buck, boost, and SEPIC converters. * **Power Supplies:** Found in laptop power adapters, industrial power modules, and distributed power systems. * **LED Drivers:** Provides stable current regulation for lighting applications. * **Filter Chokes:** Used in input/output filters to smooth out ripple current and reduce electrical noise. --- ### Equivalent Parts / Cross Reference If you are unable to source the UP2B-680-R, common alternatives include: * **Bourns:** SRR1208 Series * **Wurth Elektronik:** WE-PD Series (Type L) * **TDK:** VLF or SLF Series