## Technical Overview: UP3B-680-R Inductor The **UP3B-680-R** is a high-performance power inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the Uni-Pac™ 3B (UP3B) series, which is specifically designed for high power density and reliability in surface-mount applications. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 68 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 1.6 Amps (Typical) | | **Saturation Current (Isat)** | 1.8 Amps | | **DC Resistance (DCR)** | 0.151 Ohms (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | Surface Mount (SMD) | | **Core Material** | Ferrite | --- ### 2. Design and Construction The UP3B-680-R is built with specific electronic characteristics to optimize power conversion: * **Shielding:** It is a **non-shielded** design. While this allows for a higher saturation current in a smaller footprint, it requires careful PCB placement to avoid electromagnetic interference (EMI) with sensitive components. * **Core Material:** Uses a Ferrite core which provides low core losses, making it highly efficient for high-frequency switching. * **Terminations:** Features robust solder-plated terminations designed to withstand lead-free reflow temperatures. --- ### 3. Applications This part is commonly found in power management circuits where voltage needs to be stepped up or down. Typical uses include: 1. **DC-DC Converters:** Used as the primary energy storage element in Buck, Boost, and SEPIC converters. 2. **Industrial Electronics:** Integrated into power supplies for sensors and control units. 3. **Computer Peripherals:** Found in laptop power rails and distributed power systems. 4. **LED Lighting:** Used in driver circuits to maintain constant current. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Prefix | Series | Inductance Code | RoHS Status | | :--- | :--- | :--- | :--- | | **UP** | Uni-Pac | **680** (68 x 10^0 = 68 µH) | **-R** (RoHS Compliant) | ---