The **CFL252018CF-R82** is a surface-mount wire-wound chip inductor commonly used in high-frequency circuits. This part number follows a standardized naming convention used by manufacturers like TDK or Bourns. ### 1. Component Specifications Below are the technical characteristics of the part: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 0.82 µH | The "R82" indicates 0.82 microhenries. | | **Tolerance** | ±10% or ±20% | Depending on the specific suffix (K or M). | | **Package Size** | 2520 (Metric) | 2.5mm x 2.0mm (approx. 1008 in Imperial). | | **Height** | 1.8 mm | Indicated by the "18" in the part number. | | **Construction** | Wire-wound | Ferrite core with copper winding for high Q-factor. | | **Mounting Type** | SMD/SMT | Surface Mount Technology. | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying equivalent parts: * **CFL**: Series prefix (typically indicating a Ferrite Core Low-profile or Chip Inductor). * **2520**: Dimensions in millimeters ($2.5 \times 2.0$ mm). * **18**: Height of the component ($1.8$ mm). * **CF**: Material or coating code (often indicates Lead-Free/RoHS compliance). * **R82**: Inductance value. The "R" acts as a decimal point ($0.82$). --- ### 3. Key Electronic Characteristics Wire-wound inductors like the CFL252018 series are chosen for specific electrical advantages: 1. **High Q Factor:** Compared to multilayer inductors, wire-wound versions have lower DC resistance (DCR), leading to better efficiency in RF applications. 2. **Self-Resonant Frequency (SRF):** These parts are designed to operate effectively up to several hundred MHz before the parasitic capacitance takes over. 3. **Current Rating:** Capable of handling moderate DC currents (typically 200mA to 500mA depending on the exact series) without saturating the ferrite core. ### 4. Common Applications * **RF Matching:** Used in wireless communication modules to match impedance. * **Filtering:** Employed in LC filters to remove noise from power lines or signal lines. * **Decoupling:** Prevents high-frequency interference from affecting sensitive integrated circuits. ---