The **0805HT-R47TGLD** is a specific surface-mount (SMD) high-temperature wire-wound chip inductor. These components are typically used in RF (Radio Frequency) circuits and power supplies where high reliability and thermal stability are required. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the component's specifications: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **0805** | Case Size | 2.0 mm x 1.25 mm (Imperial 0805) | | **HT** | Series | High Temperature / High Performance Wire-wound | | **R47** | Inductance Value | 0.47 µH (470 nH) | | **T** | Tolerance | ±2% (Strict tolerance for precision) | | **G** | Termination | Gold-plated (Excellent for high-temp bonding) | | **L** | Packaging | Tape & Reel | | **D** | Testing | Standard/Specific Testing protocol | --- ### 2. Technical Specifications This component belongs to the wire-wound category, which offers a higher Q-factor (quality factor) compared to multilayer ceramic inductors. * **Inductance:** 470 nH * **Tolerance:** ±2% * **Operating Temperature:** Typically rated up to **+155°C** (due to the "HT" designation). * **Self-Resonant Frequency (SRF):** High SRF, making it suitable for high-frequency applications. * **Quality Factor (Q):** High Q-factor ensures low signal loss in filter circuits. --- ### 3. Key Features and Applications #### Key Features 1. **High Temperature Durability:** Designed to maintain inductance stability in harsh thermal environments (e.g., automotive engine compartments or aerospace). 2. **Gold Termination:** Provides superior oxidation resistance compared to tin-lead or pure tin finishes, specifically for specialized soldering or wire bonding. 3. **Wire-wound Construction:** Allows for higher current handling and lower DC resistance (DCR) compared to other SMD technologies. #### Common Applications * **RF Impedance Matching:** Used in wireless communication devices. * **Signal Filtering:** High-pass or low-pass filters in telecommunications. * **Automotive Electronics:** Sensors and control units that operate in high-heat zones. * **Medical Equipment:** High-precision diagnostic devices requiring stable components. ---