### Overview of CTX10-2-R The **CTX10-2-R** is a high-performance, surface-mount (SMT) dual-winding inductor (transformer) manufactured by **Eaton (formerly Cooper Bussmann/Coiltronics)**. It is part of the OCTA-PAC® series, designed for versatile applications requiring energy storage or voltage transformation. --- ### 1. Key Technical Specifications The electrical characteristics are defined by its dual-winding construction, allowing it to be used in series or parallel configurations. | Parameter | Value (Series) | Value (Parallel) | | :--- | :--- | :--- | | **Inductance** | 40.5 µH | 10.1 µH | | **Current Rating ($I_{rms}$)** | 1.15 A | 2.30 A | | **Peak Current ($I_{sat}$)** | 1.50 A | 3.00 A | | **DC Resistance (DCR)** | 0.208 Ω | 0.052 Ω | | **Turns Ratio** | 1:1 | 1:1 | --- ### 2. Core Functional Features * **Dual Windings:** Contains two separate windings that can be connected in series or parallel to double the inductance or the current-carrying capacity, respectively. * **Magnetic Shielding:** The OCTA-PAC® design utilizes a toroidal ferrite core, which provides excellent self-shielding to minimize Electromagnetic Interference (EMI). * **High Power Density:** Optimized for a small footprint while maintaining low core losses. * **Environmental Resilience:** Typically rated for an operating temperature range of **-40°C to +125°C**. --- ### 3. Common Applications The CTX10-2-R is a "multi-tool" component in power electronics: * **Buck/Boost Converters:** Used as a standard power inductor. * **SEPIC Converters:** Ideal for Single-Ended Primary-Inductor Converters because of its dual windings. * **Isolation/Transformers:** Can act as a 1:1 isolation transformer for signal or low-power paths. * **Common Mode Choke:** Used in EMI filtering to suppress noise on DC power lines. --- ### 4. Physical Dimensions & Packaging * **Package Type:** SMT (Surface Mount Technology). * **Size Category:** OCTA-PAC® size 2. * **Terminations:** 4-pin configuration (2 for each winding). * **RoHS Compliant:** The "-R" suffix indicates full compliance with RoHS (Restriction of Hazardous Substances) standards. --- ### 5. Connection Diagram (Internal) ```text Winding 1: Pins 1 --- 2 Winding 2: Pins 4 --- 3 Parallel Connection: Join 1-4 and 2-3 Series Connection: Join 2-4 (Input 1, Output 3) ```