The **CTC3F-R47K** is a specific model of a fixed inductor, typically used in power supplies, filtering circuits, and decoupling applications. Below is a detailed breakdown of its electronic specifications and characteristics. --- ## 1. Technical Specifications The part number follows a standard nomenclature used by manufacturers (such as Central Technologies). Here are the primary parameters: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 0.47 µH | The "R47" in the part number indicates 0.47 | | **Tolerance** | ±10% | The "K" suffix indicates a 10% tolerance range | | **Core Material** | Ferrite | High permeability material for efficiency | | **Mounting Type** | Through-Hole | Axial leaded configuration | | **Package/Case** | Conformal Coated | Insulated body to prevent short circuits | --- ## 2. Part Number Breakdown Understanding the code helps in identifying replacements or similar parts: * **CTC3F**: The series identifier. "CTC" represents the manufacturer series, and "3F" usually denotes the physical size and power handling capability. * **R47**: The inductance value. "R" acts as the decimal point (0.47). If it were 4R7, it would be 4.7 µH. * **K**: The tolerance code. * *J* = ±5% * *K* = ±10% * *M* = ±20% --- ## 3. Key Characteristics ### Physical Construction These inductors are typically **Axial Leaded**, meaning they have wires coming out of both ends of a cylindrical body. The body is coated with an epoxy resin (conformal coating) to protect the copper windings from moisture and mechanical stress. ### Electrical Behavior 1. **High Self-Resonant Frequency (SRF):** Due to the low inductance value (0.47 µH), this part can operate effectively at high frequencies without becoming capacitive. 2. **DC Resistance (DCR):** Usually very low, minimizing power loss and heat generation during operation. 3. **Current Rating:** Designed to handle a specific maximum current (Idc) before the core saturates or the temperature rises excessively. --- ## 4. Typical Applications * **Signal Filtering:** Used in low-pass filters to block high-frequency noise while allowing DC or low-frequency signals to pass. * **Decoupling:** Placed near IC power pins to filter out supply noise. * **RF Circuits:** Used in radio frequency applications where precise, low-inductance values are required. * **Power Supplies:** Used in DC-DC converters for energy storage or smoothing. ---