The **CTX68-3A-R** is a high-performance, shielded power inductor designed primarily for DC-DC converters and energy storage applications. It is manufactured by **Eaton (formerly Cooper Bussmann)** as part of the Octa-Pac® PLUS series. --- ### 1. Key Technical Specifications The following table highlights the primary electrical and physical characteristics of the CTX68-3A-R: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 68 µH (Nominal) | | **Current Rating (Irms)** | 1.11 Amperes | | **Saturation Current (Isat)** | 0.94 Amperes | | **DC Resistance (DCR)** | 0.282 Ohms (Max) | | **Tolerance** | ±20% | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | Surface Mount (SMD) | | **Shielding** | Toroidal (Low EMI) | --- ### 2. Core Functional Features * **Dual Winding Design:** The CTX series often features two windings that can be connected in series or parallel. This allows the component to function as an inductor, a 1:1 transformer, or a common-mode choke. * **Magnetic Shielding:** Its toroidal structure naturally contains the magnetic flux, which minimizes Electromagnetic Interference (EMI) with surrounding sensitive components on the PCB. * **High Power Density:** Designed to handle significant current relative to its small surface-mount footprint. * **AEC-Q200 Compliance:** Many parts in this series are automotive-grade, ensuring high reliability under mechanical stress and temperature fluctuations. --- ### 3. Common Applications The CTX68-3A-R is typically found in the following electronic circuits: 1. **Buck/Boost Converters:** Used for energy storage to smooth out voltage ripples. 2. **SEPIC Topologies:** Utilizing the dual-winding nature for single-ended primary-inductor converters. 3. **Noise Filtering:** Acts as a common-mode choke to filter out high-frequency noise in power lines. 4. **Battery Powered Devices:** Ideal for portable electronics due to its efficiency and compact SMD profile. --- ### 4. Part Number Breakdown * **CTX:** Series designation (Octa-Pac®). * **68:** Inductance value in microhenries (µH). * **3:** Size/Power rating code. * **A:** Specific design variation or internal revision. * **R:** RoHS compliant (Lead-free).