The **CTX68-2-R** is a high-performance, surface-mount (SMT) power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **OCTA-PAC® PLUS** series, which is known for its dual-winding versatility. --- ### 1. Key Specifications The technical characteristics of the CTX68-2-R are defined by its dual-coil construction, allowing it to be used in series or parallel configurations. | Parameter | Series Connection | Parallel Connection | | :--- | :--- | :--- | | **Inductance ($L$)** | 272.2 µH | 68.05 µH | | **Peak Current ($I_{sat}$)** | 1.14 A | 2.28 A | | **RMS Current ($I_{rms}$)** | 0.81 A | 1.62 A | | **DC Resistance ($DCR$)** | 0.448 $\Omega$ | 0.112 $\Omega$ | ### 2. Physical and Material Properties * **Core Material:** Powered Iron (optimized for high-frequency power conversion). * **Package Size:** OCTA-PAC® Size 2. * **Dimensions:** Approximately $11.43 \times 11.43 \times 6.35$ mm. * **Termination:** Lead-free, RoHS compliant (indicated by the **-R** suffix). * **Shielding:** Toroidal geometry provides self-shielding, which minimizes Electromagnetic Interference (EMI). ### 3. Functional Applications Because this part contains **two identical windings**, it is highly versatile in power electronic circuits: 1. **Buck/Boost Converters:** Used as a standard energy storage inductor. 2. **1:1 Transformers:** Can act as a coupled inductor for SEPIC or Cuk converters. 3. **Common Mode Chokes:** Used in DC-DC lines to filter out noise. 4. **Isolation:** Provides basic functional isolation between the two windings. ### 4. Circuit Implementation When integrating the CTX68-2-R, the PCB layout must account for the polarity dots: ```markdown # Winding Configurations Parallel: Connect Pin 1 to 2, and Pin 4 to 3. (Result: Lower Inductance, Higher Current) Series: Connect Pin 2 to 4. Input at Pin 1, Output at Pin 3. (Result: Higher Inductance, Lower Current) ``` ---