## CTX2-3P-R Electronic Component Analysis The **CTX2-3P-R** is a specific part number belonging to the **OCTA-PAC® PLUS** series of dual-winding toroidal inductors and transformers, manufactured by **Eaton (formerly Coiltronics)**. ### 1. General Specifications The CTX2-3P-R is a versatile magnetic component designed for high-density power applications. It consists of two individual windings that can be connected in series or parallel. | Feature | Specification | | :--- | :--- | | **Manufacturer** | Eaton (Coiltronics) | | **Series** | OCTA-PAC® PLUS | | **Inductance (Parallel)** | 1.14 µH (Typical) | | **Inductance (Series)** | 4.56 µH (Typical) | | **Current Rating (Irms)** | ~9.26 A (Parallel) | | **Mounting Type** | Surface Mount (SMD) | | **Core Material** | Powdered Iron (High saturation) | --- ### 2. Key Technical Features * **Dual Winding Versatility:** The device features two identical windings. This allows it to function as an inductor (series/parallel), a 1:1 transformer, or a common-mode choke. * **High Power Density:** The toroidal geometry is highly efficient, providing high energy storage in a compact footprint with low electromagnetic interference (EMI). * **OCTA-PAC® PLUS Material:** Unlike the standard OCTA-PAC, the "PLUS" series uses a higher performance core material that handles higher peak currents and exhibits lower core losses at high frequencies. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and meets RoHS standards. --- ### 3. Application Use Cases Due to its dual-winding nature, the CTX2-3P-R is commonly found in the following circuits: 1. **Buck/Boost Converters:** Used as a power inductor for DC-DC conversion. 2. **SEPIC Converters:** The two windings act as the coupled inductors required for the SEPIC topology. 3. **Isolation Transformers:** Provides 1:1 signal or power isolation. 4. **Common Mode Choke:** Used in power lines to filter out high-frequency noise. --- ### 4. Connection Configuration The behavior of the component changes based on how the pins are connected on the PCB: | Configuration | Connection Logic | Resulting Inductance | Current Capacity | | :--- | :--- | :--- | :--- | | **Parallel** | Windings connected side-by-side | Base Inductance ($L$) | Double $I$ | | **Series** | End of Winding 1 to Start of Winding 2 | $4 \times$ Base Inductance | Base $I$ |