The **CTX15-1P-R** is a high-performance, shielded inductor/transformer manufactured by **Eaton (formerly Coiltronics)**. It is part of the **OCTA-PAC®** series, known for its versatility in power conversion applications. --- ### 1. Technical Specifications The "1P" designation indicates it is a **single-winding** (inductor) configuration, though the OCTA-PAC series often features dual-winding versions (e.g., CTX15-1). | Parameter | Specification | | :--- | :--- | | **Inductance** | 15.0 µH | | **Current Rating (Typical)** | 1.1 Amps (DC) | | **DCR (Direct Current Resistance)** | ~0.115 Ohms (Max) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) | | **Shielding** | Yes (Toroidal construction) | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ### 2. Key Features * **Toroidal Core:** Uses a powdered iron toroidal core which provides natural shielding, reducing EMI (Electromagnetic Interference). * **High Efficiency:** Designed for low core losses, making it ideal for high-frequency power supplies. * **Compact Footprint:** The "OCTA-PAC" design uses a standardized hexagonal/octagonal base that saves PCB space while maintaining stability during vibration. * **Robustness:** The "-R" suffix guarantees compliance with lead-free soldering processes and environmental standards. --- ### 3. Applications The CTX15-1P-R is commonly integrated into the following circuits: * **DC-DC Converters:** Used as a power inductor for Buck, Boost, or SEPIC topologies. * **Switching Regulators:** Filters ripple current to provide a steady output voltage. * **Output Filter:** Used in power supplies to smooth the output signal and reduce noise. * **Industrial Electronics:** Due to its high temperature rating, it is often found in industrial sensors and controllers. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in selecting substitutes: | Segment | Meaning | | :--- | :--- | | **CTX** | Series Name (Coiltronics/Eaton OCTA-PAC) | | **15** | Inductance value in µH | | **1** | Size/Power rating code | | **P** | Power/Inductor configuration | | **R** | RoHS Compliant |