## CTX2-1P-R Electronic Component Overview The **CTX2-1P-R** is a high-performance power inductor from the **OCTA-PAC® PLUS** series, manufactured by **Eaton (formerly Bussmann/Coiltronics)**. This component is specifically designed as a dual-winding toroidal inductor/transformer. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 2.11 µH (Parallel) / 8.44 µH (Series) | | **Current Rating (Irms)** | 6.40 A (Parallel) | | **DC Resistance (DCR)** | 0.0116 Ω (Parallel Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | Surface Mount (SMT) | | **Material** | E-Core / Powered Iron | --- ### 2. Core Features and Design * **Dual Winding Versatility:** The CTX2-1P-R contains two identical windings. This allows the part to be used in three different configurations: 1. **Series:** For higher inductance. 2. **Parallel:** For higher current capacity. 3. **Transformer:** Used as a 1:1 coupled inductor or isolation transformer. * **High Power Density:** The toroidal geometry is highly efficient, providing a high power-to-volume ratio while minimizing EMI (Electromagnetic Interference). * **Secure Mounting:** Features a ruggedized base and header for automotive and industrial vibration resistance. --- ### 3. Common Applications The CTX2-1P-R is frequently found in high-reliability power electronics, including: * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Filtering:** Used in output filter chokes for switching power supplies. * **Isolation:** Small-scale signal or power isolation (1:1 ratio). * **Automotive Systems:** Due to its high temperature rating and durable construction. --- ### 4. Circuit Implementation Diagram Depending on how you connect the pins, the characteristics change: | Connection Type | Pinout Logic | Resulting Benefit | | :--- | :--- | :--- | | **Parallel** | Connect 1-2 and 4-3 | Maximum current, minimum DCR. | | **Series** | Connect 2 to 4 | Maximum inductance. | | **Coupled** | Primary 1-2 / Secondary 4-3 | Used as a Flyback or SEPIC inductor. |