The **1008HT-R22TFLB** is a specific part number for a **High-Temperature Surface Mount (SMT) Inductor**, typically manufactured by companies like Coilcraft or similar specialized magnetic component producers. Below is the technical breakdown of the part number and its electronic characteristics. --- ### 1. Technical Specifications The part number follows a standard nomenclature used for wire-wound ceramic core inductors. | Parameter | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 220 nH (nanohenries) | Indicated by "R22" | | **Tolerance** | ±1% | Indicated by "F" | | **Case Size** | 1008 (inches) | Approx. 2.5 x 2.0 mm | | **Core Material** | Ceramic | Non-magnetic, high frequency stability | | **Winding** | Wire-wound | Open construction for high Q-factor | | **Operating Temp** | -40°C to +155°C | "HT" stands for High Temperature | | **Termination** | Leaded / Tin-Silver-Copper | Indicated by "LB" (typically RoHS compliant) | --- ### 2. Breakdown of the Part Number Decoding the alphanumeric string: 1. **1008**: The physical dimensions of the component (Length 0.10" x Width 0.08"). 2. **HT**: **High Temperature**. These are designed for harsh environments, such as automotive under-the-hood applications or industrial machinery. 3. **R22**: The inductance value. The "R" acts as a decimal point. $0.22 \mu H = 220 nH$. 4. **T**: Packaging code (usually Taped and Reeled). 5. **F**: Tolerance code. $F = \pm 1\%$; $G = \pm 2\%$; $J = \pm 5\%$. 6. **LB**: Terminal finish/plating type (e.g., Silver-palladium-platinum-glass frit). --- ### 3. Key Electronic Features * **High Q-Factor**: Because it is wire-wound on a ceramic core, it maintains high efficiency at high frequencies (VHF/UHF). * **Self-Resonant Frequency (SRF)**: Typically very high (often above 500 MHz to 1 GHz range for this value), making it ideal for RF filtering. * **Precision**: The 1% tolerance makes it suitable for tight-tolerance resonant circuits and oscillators. * **Durability**: The "HT" rating ensures the component does not suffer from thermal aging or mechanical failure at temperatures up to 155°C. --- ### 4. Common Applications Due to its high precision and temperature resistance, this part is used in: * **Automotive Electronics**: Engine control units (ECUs) and ADAS sensors. * **Telecommunications**: RF modules, power amplifiers, and satellite equipment. * **Aerospace**: Navigation systems and communication transceivers. * **Filters**: Band-pass and low-pass filters requiring high stability.