The **1008HT-R12TJLC** is a high-temperature, surface-mount (SMD) wire-wound chip inductor. It is designed for RF applications where stability and high performance are required under extreme thermal conditions. --- ## 1. Technical Specifications The part number follows a specific nomenclature used by manufacturers (typically Coilcraft or similar high-reliability brands). | Parameter | Value / Description | | :--- | :--- | | **Inductance** | 120 nH (Nanohenries) | | **Tolerance** | ±5% (indicated by 'J') | | **Case Size** | 1008 (2.5 mm x 2.0 mm) | | **Type** | Wire-wound Ceramic Core | | **Termination** | Silver-Palladium-Platinum (Ag-Pd-Pt) | | **Operating Temp** | -40°C to +200°C (High Temp "HT" series) | --- ## 2. Key Component Breakdown ### A. Core Material (Ceramic) Unlike ferrite-core inductors, this part uses a **ceramic core**. Ceramic is non-magnetic, which ensures: * High **Q-Factor** (Quality factor) for low loss at high frequencies. * No saturation issues (Inductance remains stable regardless of current). * Exceptional thermal stability. ### B. Wire-Wound Construction The "Wire-wound" design offers lower DC resistance (DCR) compared to multilayer inductors. This allows it to handle higher current and provides better efficiency in RF tuning and matching circuits. ### C. High-Temperature Rating ("HT") Standard commercial inductors usually cap out at 125°C. The **HT** designation indicates specialized materials and construction that allow the component to function reliably up to **200°C**, making it suitable for "under-the-hood" automotive, aerospace, or down-hole drilling equipment. --- ## 3. Common Applications Due to its high frequency and high-temperature characteristics, this part is used in: * **RF Impedance Matching:** Ensuring maximum power transfer in transmitters. * **Filters:** Low-pass, high-pass, and band-pass filters for signal processing. * **Automotive Sensors:** High-heat environments near engines or exhaust systems. * **Telecommunications:** Base stations and satellite communication hardware. --- ## 4. Part Number Decoding (Example) * **1008**: Package size (0.10 x 0.08 inches). * **HT**: High Temperature. * **R12**: Inductance value (R is the decimal; R12 = 0.12 µH or 120 nH). * **T**: Likely indicates the packaging type (Tape and Reel). * **J**: Tolerance code (±5%). * **L/C**: Specific termination plating or RoHS compliance markers.