## CTX2-1A-R Electronic Component Overview The **CTX2-1A-R** is a high-performance, surface-mount (SMT) power inductor/transformer manufactured by **Eaton (formerly Coiltronics)**. It belongs to the **OCTA-PAC®** series, known for its versatility and dual-winding construction. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the CTX2-1A-R: | Parameter | Value / Specification | | :--- | :--- | | **Inductance (Parallel)** | 2.11 µH | | **Inductance (Series)** | 8.44 µH | | **Full Load Current (Irms)** | 6.40 Amps | | **Peak Current (Isat)** | 9.00 Amps | | **DCR (Direct Current Resistance)** | 0.0135 $\Omega$ (Parallel) / 0.054 $\Omega$ (Series) | | **Package / Case** | OCTA-PAC® Size 1 | | **Mounting Type** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Functional Design: Dual Winding The CTX2-1A-R features **two identical windings**. This allows the component to be used in three distinct configurations depending on how it is soldered to the PCB: 1. **Parallel Connection:** Connects the two windings side-by-side. This results in the lowest resistance and highest current capacity but lower inductance. 2. **Series Connection:** Connects the windings in a row. This quadruples the inductance (compared to parallel) but increases resistance. 3. **1:1 Transformer:** The windings remain isolated, allowing the part to act as a transformer for isolation or voltage coupling. --- ### 3. Common Applications Due to its high power density and flexible configuration, it is widely used in: * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Power Supplies:** Used as an output filter inductor or a coupled inductor. * **Energy Storage:** High-frequency applications where low core loss is required. * **Isolation:** Used in circuits requiring a 1:1 isolation ratio. --- ### 4. Part Number Breakdown * **CTX:** Series prefix (OCTA-PAC). * **2:** Size/Frame dimension. * **1A:** Inductance code/Revision. * **-R:** RoHS compliant (Lead-free). ---