## Technical Overview of CTX200-4-R The **CTX200-4-R** is a high-performance, dual-winding shielded power inductor from the **OCTA-PAC® PLUS** series, manufactured by Eaton (formerly Cooper Bussmann). These components are designed for versatile use in power conversion circuits. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 200.5 µH (nominal) | | **Current Rating (Irms)** | 0.864 Amps | | **Peak Current (Isat)** | 0.58 Amps | | **DCR (DC Resistance)** | 0.581 Ohms (Max) | | **Configuration** | Dual Winding (4 Terminals) | | **Mounting Type** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Core Features and Construction * **Dual Winding Versatility:** The part features two identical windings. This allows the inductor to be wired in three different ways: * **Series:** Increases total inductance. * **Parallel:** Increases current carrying capacity. * **1:1 Transformer:** Can be used for SEPIC converters or isolation. * **Material:** It utilizes a **powder iron core** material, which provides high saturation flux density and stable performance over a wide temperature range. * **Magnetic Shielding:** The design is shielded to minimize Electromagnetic Interference (EMI), making it suitable for high-density boards where components are close together. --- ### 3. Common Applications The CTX200-4-R is primarily found in DC-DC power conversion applications: 1. **Buck/Boost Converters:** Used as the main energy storage element. 2. **SEPIC Converters:** Utilizing the dual windings for coupled inductor topologies. 3. **Output Filters:** Smoothing high-frequency ripple in switching power supplies. 4. **Battery Powered Equipment:** Due to its compact SMD footprint and efficient energy storage. --- ### 4. Schematic Representation The device has four pins, typically represented as follows: ```text Pin 1 ●-------) )-------● Pin 4 (Winding A) ( ( Pin 2 ●-------) )-------● Pin 3 (Winding B) ``` *Note: Dots indicate polarity (phasing). For series connection, Pin 2 is tied to Pin 4.*