The **CTX68-2A-R** is a high-performance, surface-mount (SMD) power inductor, specifically part of the **Octa-Pack** series manufactured by **Eaton (formerly Cooper Bussmann/Coiltronics)**. These components are unique because they contain two separate windings in a single package. --- ### 1. Key Technical Specifications The "68" in the part number typically refers to the inductance value, and the "2A" indicates the size and configuration within the series. | Parameter | Specification (Typical) | | :--- | :--- | | **Inductance** | 68 µH (approximate, varies by series config) | | **Current Rating (Irms)** | ~0.8A to 1.5A (config dependent) | | **DCR (Direct Current Resistance)** | Low resistance for high efficiency | | **Operating Temperature** | -40°C to +125°C | | **Construction** | Dual-winding (coupled), Toroidal core | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Functional Characteristics The CTX68-2A-R is not a simple inductor; its dual-winding design allows it to be used in several ways: 1. **Inductor in Series:** Connecting the two windings in series doubles the inductance. 2. **Inductor in Parallel:** Connecting them in parallel increases the current-carrying capacity while maintaining a lower inductance. 3. **1:1 Transformer:** It can act as a basic isolation transformer or a flyback transformer. 4. **Common Mode Choke:** Used to filter out electromagnetic interference (EMI) on power lines. --- ### 3. Physical Construction and "Octa-Pack" Design * **Toroidal Core:** Uses a powdered iron or ferrite toroid core which provides excellent self-shielding, reducing EMI interference with nearby components. * **Low Profile:** The "2A" case size is designed to be compact, making it suitable for high-density PCB layouts. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and meets RoHS environmental standards. --- ### 4. Common Applications * **DC-DC Converters:** Used in Buck, Boost, and SEPIC topologies. * **Power Supplies:** Ideal for switching power supplies where space is a premium. * **Filtering:** Excellent for ripple filtering and noise suppression in automotive or industrial electronics. * **Battery Powered Equipment:** Due to its high efficiency and low DCR. ---