The **CT1206CSF-R22K** is a specific surface-mount electronic component, primarily categorized as a **Wire-Wound Chip Inductor**. This part is commonly used in Radio Frequency (RF) and communication circuits where high stability and high "Q" factors are required. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics: | Code Segment | Meaning | Description | |:---|:---|:---| | **CT** | Series Prefix | Central Technologies Ceramic Inductor Series | | **1206** | Case Size | Imperial size (1.20 x 0.06 inches / 3.2 x 1.6 mm) | | **CSF** | Construction | Ceramic Substrate / Standard Ferrite (Wire-wound) | | **R22** | Inductance Value | **0.22 µH** (220 nH) | | **K** | Tolerance | **±10%** | --- ### 2. Technical Specifications Typical values for the CT1206CSF series at the R22K value include: * **Inductance:** 220 nH (nanohenries). * **Tolerance:** ±10%. * **Quality Factor (Q):** Typically high (Min 25–45 depending on test frequency). * **SRF (Self-Resonant Frequency):** Usually > 600 MHz (Allows high-frequency operation). * **DCR (DC Resistance):** Low resistance to minimize power loss (Approx 0.50 – 0.70 Ω). * **Rated Current:** The maximum DC current it can handle before overheating (Approx 400–600 mA). --- ### 3. Key Construction Features 1. **Ceramic Core:** Provides excellent thermal stability and very low expansion, making it ideal for high-frequency applications. 2. **Wire-Wound Technology:** Copper wire is wrapped around the ceramic core. This offers much higher current handling and lower DC resistance compared to multilayer chip inductors. 3. **Encapsulation:** Often coated with an epoxy or specialized resin to protect the fine wire from physical damage and moisture. --- ### 4. Common Applications Due to its high frequency and precision characteristics, this part is used in: * **RF Transceivers:** Filtering and matching networks in wireless devices. * **Broadband Filtering:** Removing noise from high-speed data lines. * **Oscillators:** Serving as a frequency-determining element. * **Mobile Communication:** Used in smartphones, GPS modules, and Bluetooth circuits. ---