The **UP2UC-2R2-R** is a specific electronic component belonging to the family of power inductors. It is manufactured by **Eaton (formerly Cooper Bussmann)** as part of their Uni-Pac series. --- ### 1. Key Technical Specifications The part number itself contains encoded information about its electrical characteristics: | Parameter | Value / Description | | :--- | :--- | | **Inductance** | 2.2 µH (Microhenries) | | **Tolerance** | ±20% | | **Current Rating (Isat)** | ~5.3 A (Saturation Current) | | **Current Rating (Irms)** | ~4.4 A (Heating Current) | | **DC Resistance (DCR)** | ~14.1 mΩ (Max) | | **Mounting Type** | Surface Mount (SMD) | | **Shielding** | Unshielded (Drum Core) | --- ### 2. Breakdown of the Part Number The nomenclature can be dissected as follows: * **UP**: Refers to the **Uni-Pac** series family. * **2**: Refers to the physical size/dimension category. * **UC**: Indicates the "Unshielded" configuration. * **2R2**: Represents the Inductance value. The "R" acts as a decimal point ($2.2$). * **-R**: Denotes **RoHS compliance** (Lead-free). --- ### 3. Physical Characteristics The component is designed for high-density power applications. * **Core Material:** Ferrite. * **Footprint:** It typically occupies a square area of approximately $9.3mm \times 9.3mm$. * **Height:** Roughly $5.3mm$. * **Ruggedness:** The drum core design allows for high energy storage in a relatively small form factor. --- ### 4. Common Applications Due to its low DCR and moderate current handling, the UP2UC-2R2-R is found in: 1. **DC-DC Converters:** Used as a storage element in buck or boost regulators. 2. **Power Supplies:** Common in laptop adapters and industrial power modules. 3. **Filtering:** Used in EMI/RFI filtering circuits to smooth out high-frequency noise. 4. **Consumer Electronics:** Found in LED drivers and battery-powered portable devices. --- ### 5. Implementation Considerations When using this part in a circuit design, consider the following: * **Saturation:** Ensure the peak circuit current does not exceed the $I_{sat}$ rating, as the inductance will drop sharply, potentially damaging your power IC. * **Thermal Management:** The $I_{rms}$ rating is based on a temperature rise (usually $40^\circ C$). Ensure adequate PCB copper traces for heat dissipation. * **EMI:** Because this is an **unshielded** inductor, it may emit more electromagnetic interference than shielded alternatives. Place it away from sensitive signal traces.