The **0805HT-R39TGLB** is a high-performance **Surface Mount (SMT) Inductor**, specifically a wire-wound chip inductor designed for high-frequency applications. Below is a detailed breakdown of its specifications and technical characteristics. --- ## 1. Technical Specifications This part is typically manufactured by brands like **Coilcraft** (part of their 0805HT series). The alphanumeric code describes its physical and electrical properties: | Parameter | Specification | | :--- | :--- | | **Inductance** | 390 nH (indicated by `R39`) | | **Tolerance** | ±2% (indicated by `G`) | | **Case Size** | 0805 (2.0 x 1.25 mm) | | **Core Material** | Ceramic | | **Winding Type** | Wire-wound | | **Termination** | Gold over Nickel (indicated by `LB`) | --- ## 2. Key Features * **High Q Factor:** Due to the wire-wound construction on a ceramic core, it offers significantly higher Q (Quality Factor) values compared to multilayer inductors. * **Self-Resonant Frequency (SRF):** It maintains performance into the GHz range, making it ideal for RF tuning and impedance matching. * **High Precision:** The "G" tolerance (2%) ensures tight performance windows in sensitive circuits. * **Environmental Stability:** The ceramic body provides excellent thermal stability and resistance to mechanical stress. --- ## 3. Applications The 0805HT-R39TGLB is commonly found in the following circuit types: 1. **RF Filter Circuits:** Used in bandpass or low-pass filters for signal processing. 2. **Impedance Matching:** Used in wireless communication devices to match antenna impedance to the power amplifier. 3. **High-Frequency Oscillators:** Provides stable inductance for frequency generation. 4. **Wireless Infrastructure:** Found in base stations, Bluetooth modules, and Wi-Fi hardware. --- ## 4. Part Number Breakdown The part number follows a specific nomenclature: | Code Segment | Meaning | | :--- | :--- | | **0805** | The EIA package size (2.0mm x 1.25mm). | | **HT** | Series designation (High-Temperature/High-Q). | | **R39** | Inductance value (R = decimal point; 0.39µH or 390nH). | | **T** | Packaging type (usually Tape and Reel). | | **G** | Tolerance (±2%). | | **L** | Termination material (Lead-free). | | **B** | Testing/Screening level. |