The **CTX0.68-4P-R** is a specific type of electronic component known as a **High-Current, Low-Profile Inductor** (specifically a dual-winding inductor or transformer). It is part of the Octa-Pac® series, originally manufactured by Coiltronics (now a brand under Eaton/Bussmann). --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics: | Parameter | Value / Specification | |:---|:---| | **Inductance** | 0.68 µH (Microhenries) | | **Current Rating (Typical)** | High (designed for multi-amp applications) | | **Number of Windings** | 2 (Dual winding) | | **Configuration** | Surface Mount (SMT) | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | | **Package Series** | Octa-Pac (Size 4P) | --- ### 2. Key Physical Features * **Toroidal Core:** Uses a powdered iron or ferrite toroidal core, which provides excellent magnetic field confinement and low Electromagnetic Interference (EMI). * **Dual Winding:** It consists of two separate coils wound on the same core. This allows the part to be used in several different circuit configurations. * **Octa-Pac Housing:** The "4P" refers to the specific physical size of the package. These are typically square or octagonal surface-mount bases with 4 or more leads. --- ### 3. Functional Applications Because it has two windings, the CTX0.68-4P-R is highly versatile: 1. **Inductor (Series/Parallel):** * Connect windings in **series** to increase total inductance. * Connect windings in **parallel** to increase current-handling capacity. 2. **1:1 Transformer:** Can be used for isolation or to provide a secondary voltage rail. 3. **Common Mode Choke:** Used in power lines to filter out high-frequency noise. 4. **SEPIC Converters:** Commonly used in DC-DC converters where two identical inductors are required on a single core to save space and improve efficiency. --- ### 4. Meaning of the Part Number Suffixes * **CTX:** Series prefix (Octa-Pac). * **0.68:** The nominal inductance value in microhenries. * **4P:** The physical case size and power rating category. * **-R:** Lead-free / RoHS compliant materials.