The **CT1206CSF-R22J** is a surface-mount (SMD) wire-wound chip inductor. It is part of the **1206** family of components, commonly used in high-frequency applications, RF circuits, and telecommunications. ### 1. Component Specification Table | Parameter | Value | | :--- | :--- | | **Manufacturer Series** | Central Technologies (CT) - CSF Series | | **Inductance** | 220 nH (0.22 µH) | | **Tolerance** | ±5% (indicated by 'J') | | **Case Size** | 1206 (3.2mm x 1.6mm) | | **Material Core** | Ceramic | | **Maximum DC Resistance (DCR)** | 0.70 Ω | | **Maximum Rated Current** | 400 mA | | **Self-Resonant Frequency (SRF)** | 700 MHz | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Part Number Breakdown The nomenclature follows a specific logic used by Central Technologies: * **CT**: Manufacturer (Central Technologies). * **1206**: Physical dimensions in inches (0.12" x 0.06"). * **CSF**: Ceramic Substrate, High Frequency / Wire-wound series. * **R22**: Inductance value code ($R = \text{Decimal point}$). $0.22 \mu H = 220 nH$. * **J**: Tolerance code. $J = \pm 5\%$. --- ### 3. Key Technical Features * **Wire-Wound Construction:** Unlike multilayer inductors, wire-wound inductors offer significantly higher **Q (Quality) factors** and higher current handling capabilities. * **Ceramic Core:** The use of a ceramic core ensures high stability and a very high self-resonant frequency, making it ideal for RF applications where signal integrity is critical. * **Small Footprint:** The 1206 package is large enough to handle moderate power but small enough for dense PCB layouts. --- ### 4. Common Applications * **RF Transceivers:** Used in matching circuits for antennas. * **Filtering:** High-frequency noise suppression in power lines. * **Oscillators:** Serving as a frequency-determining component in LC circuits. * **Mobile Communication:** Integrated into Bluetooth, Wi-Fi, and cellular modules.