## Detailed Overview of the CTX2-2P-R The **CTX2-2P-R** is a high-performance, dual-winding surface-mount (SMD) inductor, specifically part of the **OCTA-PAC®** series manufactured by **Eaton (formerly Bussmann/Coiltronics)**. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the CTX2-2P-R: | Feature | Specification | | :--- | :--- | | **Inductance (Parallel)** | 2.0 µH | | **Inductance (Series)** | 8.0 µH | | **Current Rating (Isat)** | ~11.0 A (Parallel configuration) | | **DC Resistance (DCR)** | ~7.2 mΩ (Parallel) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | OCTA-PAC® Size 2 | | **Termination Style** | SMD/SMT (Gull-wing leads) | --- ### 2. Physical Design and Construction The "2P" in the part number indicates the size and power level within the OCTA-PAC family. * **Dual Winding:** It contains two identical windings that can be connected in **series** or **parallel**. This provides flexibility for circuit designers to adjust inductance and current handling. * **Toroidal Core:** Uses a powdered iron toroidal core. This geometry is excellent for self-shielding, reducing electromagnetic interference (EMI). * **RoHS Compliant:** The "-R" suffix denotes that the part is lead-free and complies with RoHS standards. --- ### 3. Common Applications Because of its high current capability and low profile, the CTX2-2P-R is commonly used in: 1. **DC-DC Converters:** Acts as an energy storage inductor in buck, boost, or SEPIC topologies. 2. **Transformer Mode:** Can be used as a 1:1 isolation transformer or a coupled inductor. 3. **Filtering:** Effective as a common-mode choke or a differential-mode filter to clean up power lines. 4. **Battery Powered Systems:** Ideal for high-efficiency power management in portable electronics. --- ### 4. Connection Configurations | Configuration | Inductance | Current Capacity | Resistance | | :--- | :--- | :--- | :--- | | **Parallel** | Baseline ($L$) | Double ($2 \times I$) | Half ($R/2$) | | **Series** | Quadruple ($4 \times L$) | Baseline ($I$) | Double ($2 \times R$) | ---