The **CTX50-5-52LP-R** is a high-performance power inductor belonging to the **OCTA-PAC® PLUS** series, manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). These components are known for their "dual-winding" design, which offers significant flexibility in circuit design. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance (Parallel)** | 50.1 µH | | **Inductance (Series)** | 200.4 µH | | **Current Rating (Irms)** | 1.88 Amps (Parallel) | | **DC Resistance (DCR)** | 0.117 Ω (Parallel) | | **Core Material** | Iron Powder (Material -52) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Physical Construction and Features The part is designed with two identical windings that can be connected in different configurations depending on the PCB layout: * **Dual Winding Design:** It consists of two separate coils on a single core. This allows the part to function as a single inductor, a 1:1 transformer, or a common-mode choke. * **Low Profile (LP):** The "LP" in the part number signifies a low-profile height, making it suitable for compact electronic assemblies where vertical space is limited. * **Material -52 Core:** The core is made of a specific iron powder mixture that provides high saturation flux density and low core losses at high frequencies (up to 500 kHz). --- ### 3. Connection Configurations Because there are two windings, the electrical characteristics change based on how you wire them: 1. **Parallel Connection:** * Used to increase current capacity. * Inductance remains the base value (50.1 µH). * Resistance (DCR) is halved. 2. **Series Connection:** * Used to increase total inductance. * Inductance increases by a factor of 4 (to ~200 µH). * Current capacity is halved compared to the parallel rating. 3. **1:1 Transformer:** * The primary and secondary windings can be used to provide isolation or voltage transformation in Flyback or SEPIC converters. --- ### 4. Typical Applications * **DC-DC Converters:** Ideal for Buck, Boost, and Forward converters. * **SEPIC Topology:** Often used in SEPIC (Single-Ended Primary-Inductor Converter) circuits because of the dual winding. * **Filtering:** Used as a common-mode choke to filter out EMI/RFI noise in power lines. * **Battery Powered Devices:** High efficiency and small footprint make it ideal for portable tech.