The **CTX100-2A-R** is a high-performance, shielded power inductor specifically designed for DC-DC converters and power management circuits. It is part of the **OCTA-PAC® PLUS** series manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). --- ## 1. Technical Specifications The "2A" in the part number denotes the size/package style, while "100" refers to the inductance value. | Feature | Specification | | :--- | :--- | | **Inductance** | 100 µH | | **Current Rating (Irms)** | ~0.94 A (typical for size 2A) | | **Saturation Current (Isat)** | ~1.30 A | | **DC Resistance (DCR)** | ~0.334 Ω | | **Shielding** | E-core configuration (Shielded) | | **Mounting Type** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +125°C | --- ## 2. Key Components and Construction The CTX100-2A-R is engineered for high-density power applications: * **Core Material:** It utilizes a high-frequency powder core material that offers low core losses, making it efficient for switching frequencies up to several MHz. * **Dual Winding Design:** These inductors often feature two separate windings that can be connected in series or parallel. This provides flexibility in designing different voltage ratios or current handling capabilities. * **Shielding:** The "E-core" design minimizes Electromagnetic Interference (EMI), protecting nearby sensitive components from magnetic flux leakage. * **Ruggedness:** The "R" suffix indicates that the part is **RoHS compliant** and designed to withstand lead-free solder reflow temperatures. --- ## 3. Applications This part is commonly found in industrial and consumer electronics where space is limited but power efficiency is critical: 1. **Buck/Boost Converters:** Used to step up or step down DC voltages. 2. **SEPIC Topology:** Due to its dual-winding nature, it is ideal for Single-Ended Primary-Inductor Converters. 3. **Noise Filtering:** Acts as a high-impedance path for high-frequency noise in power lines. 4. **Isolation:** Can be used as a 1:1 transformer for basic functional isolation in low-power circuits. --- ## 4. Part Number Breakdown Understanding the nomenclature helps in selecting alternates: * **CTX:** Series prefix (Coiltronics OCTA-PAC). * **100:** Nominal inductance value (100 µH). * **2A:** Case size (Specific footprint and height dimensions). * **R:** RoHS compliant.