## Overview of CTX200-2A-R The **CTX200-2A-R** is a high-performance, surface-mount power inductor belonging to the **OCTA-PAC® PLUS** series, manufactured by **Eaton (formerly Cooper Bussmann)**. These components are unique because they feature **dual windings**, allowing them to be configured in multiple ways for different power circuit requirements. --- ### Technical Specifications The following table outlines the primary electrical and physical characteristics of the CTX200-2A-R: | Parameter | Specification | | :--- | :--- | | **Inductance (Parallel)** | 196.3 µH | | **Inductance (Series)** | 785.2 µH | | **Current Rating (Parallel)** | 0.90 Amps | | **Current Rating (Series)** | 0.45 Amps | | **DC Resistance (DCR) Max** | 0.826 Ohms (Parallel) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) | | **Core Material** | Iron Powder | --- ### Key Electronic Features #### 1. Dual Winding Versatility The most significant feature of this part is its **two identical windings**. By changing the PCB layout connections, the device can function as: * **Inductor:** Connected in series or parallel to tune inductance and current capacity. * **1:1 Transformer:** Used for isolation or voltage transformation. * **Common Mode Choke:** Used for filtering electromagnetic interference (EMI). #### 2. Material and Shielding * **Core:** Uses a high-frequency iron powder core which provides low core losses. * **Shielding:** The "OCTA-PAC" design provides a semi-shielded structure, reducing EMI compared to open-core inductors while maintaining a compact footprint. #### 3. Ruggedness The "2A" in the part number signifies a specific size/power rating within the series, and the "-R" suffix indicates that the part is **RoHS compliant** (lead-free). --- ### Common Applications Due to its flexibility and power density, the CTX200-2A-R is typically found in: 1. **DC-DC Converters:** Specifically Buck, Boost, and SEPIC topologies. 2. **Input/Output Filtering:** Used as a ripple filter for power supplies. 3. **Isolation:** Providing low-power signal or bias voltage isolation. 4. **Energy Storage:** Acts as the primary magnetic storage element in switching regulators. --- ### Winding Configuration Diagram To change the performance, the leads are connected as follows: ```text Parallel Connection: Series Connection: (Pins 1-4 & 2-3 tied) (Pin 2 connected to 3) 1 +-----+ 2 1 +-----+ 2 | | | | | | | | 4 +-----+ 3 4 +-----+ 3 ``` ---