The **CT1008LSCF-R22K** is a surface-mount (SMD) wire-wound chip inductor commonly used in Radio Frequency (RF) and high-frequency communication circuits. --- ## 1. Technical Specifications The part number follows a specific nomenclature used by manufacturers (typically Central Technologies). Below is the technical breakdown: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 0.22 µH (220 nH) | The core property of the component. | | **Tolerance** | ±10% | Indicated by the 'K' at the end of the code. | | **Package / Case** | 1008 (EIA) | Physical size: 2.5mm x 2.0mm (0.10" x 0.08"). | | **Core Material** | Ceramic | High Q-factor and high self-resonant frequency. | | **Max DC Resistance (DCR)** | ~0.35 Ω | Internal resistance of the copper wire. | | **Max DC Current** | ~500 mA | Maximum current before overheating or saturation. | | **Self-Resonant Freq (SRF)** | > 450 MHz | The frequency limit where it behaves as an inductor. | --- ## 2. Key Features * **Wire-Wound Construction:** Unlike multilayer inductors, this uses a copper wire wound around a ceramic core, providing significantly higher **Q (Quality Factor)** and lower DCR. * **Low Profile:** The "LS" in the series often denotes a low-profile or standard height optimization for compact PCB designs. * **High Stability:** The ceramic core ensures that the inductance remains stable across a wide temperature range and varying frequencies. --- ## 3. Part Number Deciphering To understand similar components, here is how the code is typically structured: 1. **CT**: Central Technologies (Manufacturer). 2. **1008**: The physical size (2.5mm x 2.0mm). 3. **LS**: Series identifier (Wire-wound, Low Profile). 4. **CF**: Lead-Free / RoHS Compliant. 5. **R22**: Inductance value (R acts as a decimal point; R22 = 0.22 µH). 6. **K**: Tolerance code (K = ±10%, J = ±5%, M = ±20%). --- ## 4. Common Applications Due to its high frequency and high Q characteristics, this inductor is primarily used in: * **RF Transceivers:** Matching networks for antennas. * **Mobile Communication:** Filtering in GSM, Wi-Fi, and Bluetooth modules. * **Broadband Equipment:** High-speed data processing units. * **EMI Suppression:** Filtering high-frequency noise from signal lines. ---