## Overview of the UP3B-2R2-R The **UP3B-2R2-R** is a high-performance, shielded power inductor manufactured by **Eaton (formerly Bussmann)**. It belongs to the **Uni-Pac™ (UP)** series, which is designed for high power density and reliability in surface-mount applications. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify its specific characteristics: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **UP** | Series Name | Uni-Pac™ Series | | **3B** | Physical Size | Dimensions approx. 13.9mm x 18.8mm | | **2R2** | Inductance Value | 2.2 Microhenries ($\mu H$) | | **-R** | RoHS Compliant | Lead-free and environmental standard compliant | --- ### 2. Key Specifications The following table highlights the critical electrical and physical properties: | Property | Value | | :--- | :--- | | **Inductance** | 2.2 $\mu H$ | | **Inductance Tolerance** | $\pm 20\%$ | | **Rated Current ($I_{rms}$)** | 8.80 Amperes | | **Saturation Current ($I_{sat}$)** | 14.3 Amperes | | **DC Resistance (DCR)** | 0.0075 $\Omega$ (Max) | | **Mounting Type** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Core Features & Construction * **Magnetic Shielding:** The part features a ferrite core construction that minimizes Electromagnetic Interference (EMI), making it suitable for noise-sensitive circuits. * **High Power Density:** Its design allows for a high current-carrying capacity relative to its footprint. * **Low DCR:** The low DC resistance ensures minimal power loss and reduces heat generation during operation. * **Rugged Design:** The "3B" size offers a large solder pad area, providing excellent mechanical stability on the PCB. --- ### 4. Common Applications This inductor is typically used in power management circuits where high efficiency is required: 1. **DC-DC Converters:** Used as a storage element in buck, boost, or buck-boost regulators. 2. **Voltage Regulator Modules (VRMs):** Found in servers and desktop computing. 3. **Industrial Electronics:** Used in motor controllers and high-current power supplies. 4. **Battery Powered Systems:** Ideal for portable equipment due to its efficiency.