The **CTS2F-R18J** is a specific electronic component belonging to the **fixed inductor** family, commonly used in radio frequency (RF) and signal filtering circuits. Below is a detailed technical breakdown of this part. --- ### 1. General Specifications The part number follows a standardized naming convention for molded RF inductors. | Feature | Specification | | :--- | :--- | | **Component Type** | Fixed Inductor (Molded) | | **Inductance** | 0.18 µH (Microhenries) | | **Tolerance** | ±5% (indicated by the 'J' suffix) | | **Form Factor** | Axial Leaded | | **Core Material** | Phenolic (typically used for high-frequency applications) | ### 2. Detailed Technical Parameters These values are critical for determining if the inductor is suitable for a specific power or frequency range. * **Q-Factor (Quality Factor):** Usually ranges between 25 and 40 at a test frequency of 25 MHz. A high Q-factor indicates low energy loss relative to the stored energy. * **Self-Resonant Frequency (SRF):** Approximately 500-600 MHz. Operating above this frequency causes the component to behave like a capacitor rather than an inductor. * **DC Resistance (DCR):** Typically low, around 0.10 to 0.15 Ohms, to minimize heat dissipation. * **Rated Current (Idc):** Generally rated for ~600mA to 800mA depending on the specific manufacturer series. --- ### 3. Part Number Breakdown Understanding the alphanumeric code helps in identifying substitutes. | Code | Meaning | | :--- | :--- | | **CTS2F** | Series/Package style (Molded Axial Lead) | | **R18** | Inductance Value (R acts as a decimal: 0.18) | | **J** | Tolerance Code (J = ±5%, K = ±10%, M = ±20%) | --- ### 4. Common Applications Due to its low inductance and high resonant frequency, the CTS2F-R18J is primarily used in: * **RF Tuning:** Used in communication equipment for oscillator circuits. * **Signal Filtering:** Blocking high-frequency noise (EMI/RFI) in sensitive signal lines. * **Decoupling:** Preventing high-frequency interference from traveling through power supply rails. --- ### 5. Physical Dimensions The "CTS2F" series usually follows standard physical sizing for axial inductors: * **Body Length:** ~6.35 mm * **Body Diameter:** ~2.4 mm * **Lead Diameter:** ~0.5 mm