The **VP3-0055-R** is a high-performance power inductor from the **Versa-Pac (VP)** series, manufactured by **Eaton (formerly Coiltronics/Bussmann)**. It is characterized by its multi-winding design, which offers extreme versatility in power circuit design. --- ### 1. Key Technical Specifications The "0055" in the part number indicates the specific core size and winding configuration. Below are the primary electrical characteristics: | Parameter | Value / Specification | | :--- | :--- | | **Inductance (Open Circuit)** | ~4.6 µH to 167 µH (Configuration dependent) | | **Current Rating (Irms)** | ~0.7A to 5.4A (Configuration dependent) | | **Number of Windings** | 6 Independent Windings | | **DC Resistance (DCR)** | ~0.024 Ω per winding | | **Isolation Voltage** | 500VAC (Winding to Winding) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | Surface Mount (SMD) | --- ### 2. Physical Construction & Design The VP3-0055-R is unique because it contains **six identical, independent windings** on a single ferrite core. This "Versa-Pac" architecture allows engineers to connect the windings in various ways: * **Series Connection:** Increases total inductance. * **Parallel Connection:** Increases current carrying capacity. * **Transformer Mode:** Can be used as a 1:1 or multi-tap transformer (Flyback, Forward, or SEPIC). * **Inductor Mode:** Used for filtering or energy storage in DC-DC converters. --- ### 3. Applications Due to its flexibility, this part is commonly found in: * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Isolation:** Providing low-power isolated rails. * **Feedback Loops:** Used as a sensing or auxiliary winding. * **Telecommunications:** Power supplies for networking equipment. --- ### 4. Part Number Breakdown * **VP:** Versa-Pac Series. * **3:** Size/Frame dimension (approx. 13mm x 13mm footprint). * **0055:** Core and winding specific code. * **-R:** RoHS compliant (Lead-free). ---