The **CTX210655-R** is a specific surface-mount power inductor designed by Eaton (formerly Cooper Bussmann). It belongs to the **OCTA-PAC® PLUS** series, which is known for its high power density and versatility in DC-DC conversion applications. --- ## 🛠️ Key Technical Specifications The CTX210655-R is a toroidal, dual-winding inductor. Here are the primary technical parameters: | Parameter | Specification | | :--- | :--- | | **Inductance** | 24.2 µH (typical) | | **Current Rating (Irms)** | ~2.5 to 3.0 Amperes | | **DC Resistance (DCR)** | ~0.045 to 0.055 Ohms | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Operating Temperature** | -40°C to +125°C | | **Package/Case** | Size 2 (approx. 11.4mm x 11.4mm) | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ## 🔍 Structural Features ### 1. Dual Winding Design The "CTX" series often features two separate windings on a single core. This allows the component to be used in several configurations: * **Series:** For higher inductance. * **Parallel:** For higher current capacity. * **1:1 Transformer:** For SEPIC, flyback, or isolated converters. ### 2. Toroidal Core The use of a toroidal (ring-shaped) core helps contain the magnetic flux within the core itself. This results in: * **Low EMI:** Reduced electromagnetic interference compared to open-core inductors. * **Efficiency:** High energy storage in a compact footprint. --- ## 💡 Common Applications The CTX210655-R is typically found in power management circuits where space and thermal efficiency are critical: 1. **DC-DC Converters:** Buck (step-down), Boost (step-up), and Buck-Boost topologies. 2. **SEPIC Converters:** Utilizing the dual-winding nature for coupled inductor applications. 3. **Filtering:** Used in output filters to smooth out ripple current in switching power supplies. 4. **Telecommunications:** Power modules for networking hardware. --- ## ⚠️ Selection Tips When integrating this part into a PCB design, ensure that: * **Pad Layout:** The footprint matches the "Size 2" OCTA-PAC dimensions (approximately 0.45 inches square). * **Saturation Current (Isat):** Ensure the peak circuit current does not exceed the inductor's saturation point, which would cause a sharp drop in inductance.