## Overview of the UP2B-820-R Inductor The **UP2B-820-R** is a high-performance, power inductor part of the **UP2B Series** manufactured by **Eaton (formerly Bussmann/Coiltronics)**. It is specifically designed for surface-mount applications requiring high energy storage and low losses. --- ### 1. Key Technical Specifications The part number itself follows a specific nomenclature where "820" represents the inductance value and "R" indicates RoHS compliance. | Feature | Specification | | :--- | :--- | | **Inductance** | 82 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 1.14 Amperes | | **Saturation Current (Isat)** | 1.25 Amperes | | **DC Resistance (DCR)** | 0.231 Ohms (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | Non-Standard SMD (approx. 13.9mm x 9.4mm) | --- ### 2. Physical Construction * **Shielding:** This is a **shielded inductor**. The magnetic field is contained within the component, which minimizes Electromagnetic Interference (EMI) with surrounding components. * **Core Material:** It typically utilizes a Ferrite core, which provides high efficiency and low core losses at high frequencies. * **Termination:** Features robust solder pads designed for reliable surface-mount technology (SMT) reflow processes. --- ### 3. Common Applications The UP2B-820-R is primarily used in power management circuits where voltage regulation and filtering are required. * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Filtering:** Used in input and output filters to smooth out voltage ripples. * **Industrial Electronics:** Power supplies for instrumentation and control systems. * **Consumer Electronics:** Laptops, LED drivers, and battery-powered devices. --- ### 4. Advantages 1. **High Energy Storage:** Capable of handling significant current for its size. 2. **Low EMI:** The shielded drum core construction makes it suitable for noise-sensitive environments. 3. **Durability:** High thermal stability allows it to operate in harsh industrial temperatures.