The **CTX68-1-R** is a high-performance, surface-mount (SMT) dual-winding inductor (or transformer) manufactured by **Eaton (formerly Cooper Bussmann/Coiltronics)**. It is part of the **OCTA-PAC** series, known for its versatility in power conversion circuits. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the CTX68-1-R: | Parameter | Value | | :--- | :--- | | **Inductance (Parallel)** | 67.52 µH | | **Inductance (Series)** | 270.08 µH | | **Current Rating (Parallel)** | 1.15 A | | **DC Resistance (DCR) Max** | 0.231 Ω (Parallel) | | **Configuration** | Dual Winding (1:1 Ratio) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | SMT (Surface Mount) | --- ### 2. Functional Characteristics The "Dual Winding" nature of this component allows it to function in several different modes depending on how the pins are connected on the PCB: * **1:1 Transformer:** Used for isolation or voltage transformation. * **Coupled Inductor:** Used in SEPIC or Zeta converters to reduce ripple and improve efficiency. * **Series Inductor:** Pins connected in series to achieve higher inductance (approx. 270 µH). * **Parallel Inductor:** Pins connected in parallel to handle higher current (approx. 1.15 A). * **Common Mode Choke:** Used for EMI filtering to suppress noise on power lines. --- ### 3. Physical Construction * **Core Material:** Powered Iron or Ferrite (depending on the specific sub-series), designed for high-frequency power applications. * **Shielding:** It is typically unshielded, which provides high saturation current but requires careful placement to avoid EMI interference with sensitive nearby components. * **Footprint:** The OCTA-PAC size 1 footprint is standardized, making it easy to find second-source alternatives if needed. --- ### 4. Common Applications The CTX68-1-R is most frequently found in: 1. **DC-DC Converters:** Buck, Boost, and SEPIC topologies. 2. **Power Supplies:** Switching regulators for industrial and telecommunications equipment. 3. **Filtering:** Input/Output filters for smoothing current or blocking high-frequency noise. 4. **Signal Isolation:** Basic isolation between two circuit stages. ---