The **CTLQ1206NF-R22K** is a surface-mount (SMD) multilayer chip inductor manufactured by Central Technologies (often part of their CTLQ series). This component is designed for high-frequency applications where space-saving and reliability are critical. ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the component's physical and electrical characteristics: | Code | Meaning | Description | | :--- | :--- | :--- | | **CTLQ** | Series Prefix | Multilayer Chip Inductor Series | | **1206** | Case Size | Imperial size 1206 (approx. 3.2mm x 1.6mm) | | **NF** | Material/Process | Non-magnetic/Ferrite core (standard series) | | **R22** | Inductance Value | R represents decimal point: **0.22 µH** | | **K** | Tolerance | **±10%** | --- ### 2. Technical Specifications Below are the typical electrical parameters for this specific part: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.22 µH | | **Tolerance** | ±10% | | **Test Frequency** | 25 MHz | | **DC Resistance (DCR) Max** | ~0.40 Ω | | **Rated Current (Idc)** | ~250 mA | | **Self-Resonant Frequency (SRF) Min** | ~250 MHz | | **Operating Temperature** | -55°C to +125°C | --- ### 3. Key Features and Applications #### Features * **Multilayer Construction:** Provides excellent magnetic shielding, reducing EMI/RFI interference. * **High Reliability:** No lead wires to break; ceramic/ferrite body is highly stable against mechanical stress. * **Standard Footprint:** The 1206 package is easily handled by automated pick-and-place machines. #### Applications * **Filtering:** High-frequency noise suppression in power lines and signal lines. * **Impedance Matching:** Used in RF circuits for smartphones, WLAN, and Bluetooth modules. * **Decoupling:** Prevents high-frequency interference from affecting sensitive integrated circuits (ICs). --- ### 4. Schematic Representation In a circuit diagram, this part is represented by a standard inductor symbol: ```text L1 (0.22uH) ----(nnnn)---- ```