## Detailed Overview of SWI0805F-R68K The **SWI0805F-R68K** is a surface-mount (SMD) wire-wound chip inductor. It is commonly used in high-frequency applications, signal processing, and RF circuits where stability and a high quality factor (Q) are required. ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **SWI** | Series Prefix | Surface Wire-wound Inductor | | **0805** | Case Size | 0.08 x 0.05 inches (2.01 x 1.25 mm) | | **F** | Material/Core | Ferrite Core (High inductance/current) | | **R68** | Inductance Value | 0.68 µH (680 nH) | | **K** | Tolerance | ±10% | --- ### 2. Technical Specifications These components are engineered for precision and reliability in compact electronic assemblies. | Parameter | Value | | :--- | :--- | | **Inductance** | 0.68 µH | | **Tolerance** | ±10% | | **Core Material** | Ferrite | | **DC Resistance (DCR)** | ~0.70 Ω (Max) | | **Rated Current** | ~400 mA (Typical) | | **Self-Resonant Frequency (SRF)** | ~180 MHz (Min) | | **Quality Factor (Q)** | ~20 (Min at test frequency) | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Key Features & Applications #### Features * **High Q Factor:** Excellent efficiency in resonance circuits. * **Wire-wound Construction:** Provides much higher current handling and lower DC resistance compared to multilayer inductors. * **Small Footprint:** The 0805 package is ideal for high-density PCB designs. * **Stability:** The ferrite core ensures stable inductance across a range of temperatures. #### Applications * **RF Transceivers:** Used in matching networks and filters. * **Mobile Communication:** Smartphones, GPS modules, and Bluetooth devices. * **Power Decoupling:** Filtering high-frequency noise in power supply lines. * **Broadband Systems:** Signal shaping in telecommunications equipment. --- ### 4. PCB Footprint Data (0805 Metric 2012) If you are designing a PCB, here are the standard dimensions for the 0805 package: ```markdown Dimension | Inches | Millimeters -------------|--------|------------ Length (L) | 0.079 | 2.00 Width (W) | 0.049 | 1.25 Thickness (T)| 0.047 | 1.20 ```