The **CTFP3-R39N** is a specialized electronic component, specifically a **Flat Wire High-Current Power Inductor**. It is commonly used in high-density power applications such as DC-DC converters, VRMs (Voltage Regulator Modules), and server power supplies. --- ## 1. Component Overview The "CTFP3" series is designed for applications requiring high efficiency and a low profile. The "R39N" suffix indicates its specific inductance value and tolerance. | Feature | Specification | | :--- | :--- | | **Component Type** | Fixed Inductor (SMD) | | **Core Material** | Ferrite / Composite | | **Inductance** | 0.39 µH (Microhenries) | | **Tolerance** | ±30% (Standard for "N" suffix) | | **Mounting Type** | Surface Mount (SMD) | --- ## 2. Key Electronic Characteristics The CTFP3-R39N is engineered to handle significant current with minimal energy loss. ### A. Low DCR (DC Resistance) Because this part uses **flat wire** technology, the cross-sectional area of the conductor is larger compared to round wire. This results in extremely low resistance, reducing heat generation during high-current operation. ### B. High Saturation Current ($I_{sat}$) The inductor is designed to maintain its inductance even when high levels of current pass through it. Unlike standard inductors that "saturate" and lose effectiveness, this part has a soft-saturation curve. ### C. EMI Shielding Most CTFP3 series inductors are magnetically shielded. This prevents the magnetic fields generated by the inductor from interfering with nearby sensitive components on the PCB. --- ## 3. Typical Applications Due to its low inductance (0.39µH) and high current capacity, it is ideal for: * **Computing:** CPU and GPU power delivery (VCore). * **Networking:** High-speed routers and switches. * **Power Conversion:** Point-of-Load (POL) converters where voltage is stepped down (e.g., 12V to 1.8V). --- ## 4. Physical Dimensions (Typical CTFP3 Series) *Note: Dimensions can vary slightly by manufacturer, but the CTFP3 usually follows a standard footprint.* | Dimension | Value (Approximate) | | :--- | :--- | | **Length** | ~13.0 mm | | **Width** | ~13.0 mm | | **Height** | ~3.5 mm to 6.5 mm | ---