The **0805HT-R15TGLD** is a specific part number for a High-Temperature, Surface Mount (SMD) Wire-Wound Inductor, typically manufactured by **Coilcraft**. Below is a detailed breakdown of its specifications and characteristics based on the alphanumeric code. --- ## 1. Part Number Breakdown The part number follows a standard convention used for high-performance inductors: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **0805** | Case Size | 0.08 x 0.05 inches (2.01 x 1.27 mm) | | **HT** | Series | High Temperature / High Performance Wire-wound | | **R15** | Inductance Value | R15 = 0.15 µH (or 150 nH) | | **T** | Tolerance | ±10% (Commonly) | | **G** | Termination | Gold-plated (RoHS compliant) | | **L** | Packaging | Tape and Reel | | **D** | Testing/Grade | Specific testing level or finish | --- ## 2. Technical Specifications These components are designed for RF (Radio Frequency) applications where stability and high "Q" factors are required. ### Electrical Characteristics * **Inductance:** 150 nH (0.15 µH). * **Quality Factor (Q):** Typically high (approx. 45–60 at 100 MHz). * **Self-Resonant Frequency (SRF):** Usually around 1.2 GHz to 1.5 GHz. * **DC Resistance (DCR):** Low resistance to minimize power loss (Approx 0.5 - 0.7 Ohms). * **Current Rating (Irms):** Maximum current it can handle before heating up significantly (Approx 400-500 mA). ### Environmental & Mechanical * **Wire-Wound Construction:** Provides better performance at high frequencies compared to multilayer inductors. * **Temperature Range:** Often rated for -40°C to +125°C or higher (the "HT" designation). * **Footprint:** Standard 0805 SMD footprint, making it compatible with most pick-and-place machines. --- ## 3. Typical Applications Due to its high-temperature stability and RF performance, this part is commonly used in: 1. **RF Impedance Matching:** Used in wireless communication devices to match antenna impedance. 2. **Filter Circuits:** Low-pass, high-pass, or band-pass filters in telecommunications. 3. **Broadband Amplifiers:** Decoupling and biasing circuits. 4. **Automotive/Industrial:** High-reliability environments where temperature fluctuations are common. --- ## 4. Design Considerations * **Orientation:** Wire-wound inductors can have polarity markers or dots. Ensure consistent orientation if crosstalk between adjacent components is a concern. * **Proximity:** Avoid placing high-speed digital lines directly under the inductor to prevent magnetic coupling/interference. * **Soldering:** Gold-plated terminations (the "G" in the code) are excellent for preventing oxidation but require appropriate solder profiles to ensure a strong intermetallic bond.