## Technical Overview of CTX210657-R The **CTX210657-R** is a high-performance **Octa-Path Common Mode Choke** designed by Eaton (formerly Cooper Bussmann/Coiltronics). It is part of the OCTA-PAC® series and is primarily used in power conversion and signal filtering applications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Eaton (Coiltronics) | | **Inductance** | ~5.3 µH (per winding) | | **Current Rating** | ~0.82 A (Average RMS) | | **DC Resistance (DCR)** | ~147 mΩ (per winding) | | **Mounting Type** | Surface Mount (SMT) | | **Package / Case** | OCTA-PAC® Size 1 (approx. 11.4mm x 11.4mm) | | **Number of Windings** | 8 | --- ### 2. Functional Description The "Octa-Path" design is unique because it consists of **eight identical windings** on a single toroidal core. This provides engineers with significant flexibility: * **Common Mode Filter:** It can be used to suppress electromagnetic interference (EMI) across multiple lines simultaneously. * **Coupled Inductor:** The windings can be connected in series or parallel to create custom inductance values or current capacities. * **Multi-Output Transformer:** It can function as a 1:1 (up to 1:7) transformer for isolated feedback or auxiliary power rails. ### 3. Common Applications * **Data Communications:** Filtering noise in telecommunications equipment. * **Power Supplies:** Used in DC-DC converters (Buck, Boost, or SEPIC topologies). * **Industrial Electronics:** Signal isolation and EMI suppression for sensor arrays. * **Computer Peripherals:** Voltage Regulation Modules (VRMs). --- ### 4. Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **CTX** | Coiltronics product prefix | | **210657** | Specific design/winding sequence identifier | | **-R** | RoHS compliant (Lead-free) |