The **CTX410805-R** is a specific surface-mount power inductor designed by Eaton (formerly Cooper Bussmann). It belongs to the **CTX series**, which is widely recognized for its high density and versatility in DC-DC conversion applications. --- ## 1. Technical Specifications Below are the primary electrical and physical characteristics of the CTX410805-R: | Property | Value / Detail | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | ~25.0 Amperes | | **Saturation Current (Isat)** | ~40.0 Amperes | | **DC Resistance (DCR)** | ~1.15 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | Surface Mount (SMD) | | **Material** | Ferrite Core | --- ## 2. Key Features The CTX410805-R is engineered for high-performance power circuits. Its design focuses on the following: * **Low DCR:** The extremely low DC resistance (measured in milliohms) minimizes power loss due to heat, significantly increasing the efficiency of the power supply. * **High Saturation:** It can handle high peak currents without the inductance dropping off sharply, which is critical for preventing circuit instability. * **Magnetic Shielding:** The design is typically shielded to reduce Electromagnetic Interference (EMI), protecting nearby sensitive components from noise. * **RoHS Compliant:** The "-R" suffix indicates that the part is compliant with lead-free and environmental regulations. --- ## 3. Common Applications This inductor is typically used in high-current, low-voltage power regulation modules, including: 1. **Multi-phase Buck Regulators:** Used in CPU/GPU power delivery. 2. **DC-DC Converters:** Found in telecommunications and server hardware. 3. **Voltage Regulator Modules (VRM):** Crucial for modern motherboards and industrial computing. 4. **Battery Powered Systems:** Where high efficiency is required to extend battery life. --- ## 4. Footprint and Mounting The part is designed for automated "Pick and Place" assembly. It features a robust construction that survives high-temperature reflow soldering processes. When designing a PCB for this part, ensure the copper traces are wide enough to handle the rated **25A+ current** to avoid overheating the board itself.