The **VP5-0155-R** is a high-performance power inductor manufactured by **Eaton (formerly Coiltronics)**. It is part of the Versa-Pac series, which is specifically designed for versatility in power conversion circuits. --- ### 1. Key Technical Specifications The following table highlights the primary electrical characteristics of the VP5-0155-R: | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Eaton (Coiltronics) | | **Series** | Versa-Pac (VP) | | **Inductance (Open Circuit)** | 14.2 µH (per winding) | | **Number of Windings** | 6 independent windings | | **Full Load Current** | ~4.7 Amps (per winding) | | **DCR (DC Resistance)** | ~0.038 Ohms (per winding) | | **Package/Case** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Construction & Design The VP5-0155-R is unique because of its **multi-winding architecture**. Instead of a single coil, it contains six identical, independent windings. * **Winding Flexibility:** Because the windings are separate, they can be connected in **series** or **parallel**. * *Series:* Increases inductance and voltage handling. * *Parallel:* Increases current-carrying capacity. * **Core Material:** Uses high-frequency ferrite material to minimize core losses. * **Shielding:** It is typically semi-shielded to reduce Electromagnetic Interference (EMI) in sensitive circuits. --- ### 3. Common Applications Due to its configurable nature, the VP5-0155-R is found in various power electronic stages: 1. **Flyback Transformers:** By using some windings as primary and others as secondary, it can function as a multi-output transformer. 2. **Buck/Boost Converters:** Used for energy storage in DC-DC conversion. 3. **Cuk Converters:** The multiple windings allow for integrated magnetics in complex topologies. 4. **Common-Mode Chokes:** Can be wired to provide noise suppression in power lines. --- ### 4. Circuit Symbol & Connection In a schematic, the part is represented as a series of dots and coils. The "R" in the part number indicates that the component is **RoHS Compliant**. ```text Winding 1: [1]--mmm--[12] Winding 2: [2]--mmm--[11] Winding 3: [3]--mmm--[10] Winding 4: [4]--mmm--[9] Winding 5: [5]--mmm--[8] Winding 6: [6]--mmm--[7] (Numbers represent pinouts on the SMD pad) ```