The **CTC3F-R18J** is a high-reliability fixed inductor, commonly used in radio frequency (RF) and signal filtering applications. It belongs to the **CTC3F Series**, characterized by its axial leaded design and conformal coating. --- ### 1. Technical Specifications The following table summarizes the primary electronic characteristics of the CTC3F-R18J: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.18 µH | | **Tolerance** | ±5% (indicated by the "J" suffix) | | **Current Rating (Idc)** | ~930 mA (approximate for this value) | | **DC Resistance (Rdc)** | ~0.12 Ohms (Max) | | **Self-Resonant Frequency** | ~500 MHz | | **Core Material** | Phenolic (Non-magnetic) | | **Termination** | Axial Leaded (Through-hole) | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the specific properties of the component: * **CTC3F**: Series designation (Conformal Coated, Axial Inductor). * **R18**: The inductance value. "R" acts as a decimal point, meaning **0.18**. * **J**: The tolerance code. **J** stands for **±5%**. (K would be ±10%, M would be ±20%). --- ### 3. Key Electronic Features * **High Q Factor:** These inductors are designed to have high quality factors, making them efficient for resonant circuits and frequency selection. * **Phenolic Core:** Since the inductance is low (0.18 µH), a phenolic core is used. This provides excellent stability and high self-resonant frequencies because it does not suffer from the saturation or losses associated with ferrite at high frequencies. * **Protection:** The "F" in the series often denotes a conformal epoxy coating which provides moisture resistance and electrical insulation. --- ### 4. Common Applications Due to its low inductance and high frequency response, the CTC3F-R18J is typically found in: 1. **RF Circuits:** Matching networks and tuning circuits for VHF/UHF frequencies. 2. **EMI/RFI Filtering:** Suppressing high-frequency noise in power supply lines. 3. **Signal Processing:** Decoupling and filtering in communication equipment. ---