The part number **18AC-A766-R** refers to a high-quality **RF (Radio Frequency) Inductor**, specifically a wire-wound air core inductor manufactured by companies like **Coilcraft**. These components are designed for high-frequency applications where low loss and high Q-factors are critical. --- ### Technical Specifications Below is a breakdown of the typical characteristics for this specific series: | Parameter | Typical Value / Description | |:---|:---| | **Inductance** | 18.55 nH (approximate, based on series coding) | | **Tolerance** | ±5% (standard for "R" suffix) | | **Material** | Air Core (Non-magnetic) | | **Termination** | RoHS Compliant (Matte Tin over Copper) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Q Factor** | High (typically >100 at 1.5 GHz) | --- ### Key Features 1. **Air Core Construction:** Since it does not have a ferrite or iron core, it is immune to magnetic saturation. This ensures the inductance remains stable regardless of the current passing through it. 2. **High Q Factor:** These parts provide exceptionally low DC resistance (DCR) and high "Quality Factor," making them ideal for signal filtering and impedance matching. 3. **Self-Resonant Frequency (SRF):** It features a very high SRF, allowing it to operate effectively in the Gigahertz (GHz) range. 4. **Stability:** High thermal stability and tight tolerances for precision RF circuits. --- ### Common Applications The 18AC-A766-R is commonly found in the following electronic systems: * **Wireless Communication:** Used in cellular base stations and Wi-Fi routers. * **RF Filtering:** Bandpass, high-pass, and low-pass filters. * **Impedance Matching:** Ensuring maximum power transfer between an antenna and a power amplifier. * **Oscillators:** Serving as the inductive element in high-frequency LC tank circuits. --- ### Footprint Information This component typically uses a standard SMD footprint. For automated assembly, it is usually provided on **Tape and Reel**. ```markdown Dimensions (Approximate): - Length: 3.68 mm - Width: 3.05 mm - Height: 3.18 mm ```