The **CTML1206-R22M** is a specific type of Surface Mount Device (SMD) multilayer chip inductor. It is commonly used in high-frequency circuits for signal conditioning and noise suppression. Below is a detailed breakdown of its specifications and characteristics. ### 1. Technical Specifications The part number follows a standard nomenclature for electronic components. Here is the technical breakdown: | Parameter | Value / Description | | :--- | :--- | | **Series** | CTML (Multilayer Chip Inductor) | | **Case Size** | 1206 (3.2mm x 1.6mm) | | **Inductance** | 0.22 µH (Microhenries) | | **Tolerance** | ±20% (indicated by 'M') | | **Core Material** | Ferrite | | **Termination** | Nickel/Tin plated (Lead-free/RoHS compliant) | --- ### 2. Part Number Decoding Understanding the suffix and prefix helps in identifying its performance limits: * **CTML**: Indicates the series of multilayer chip inductors. These are constructed by layering ceramic material and conductive paste. * **1206**: The physical package size. 0.12 inches long by 0.06 inches wide. * **R22**: The inductance value. "R" acts as a decimal point. $R22 = 0.22 \mu H$. * **M**: The tolerance code. $M = \pm 20\%$, $K = \pm 10\%$, $J = \pm 5\%$. --- ### 3. Key Features and Applications Multilayer ferrite inductors like the CTML1206-R22M differ from wire-wound inductors because they are monolithic and magnetic shielded. #### Key Features: * **Magnetic Shielding:** The multilayer structure creates a closed magnetic circuit, which minimizes crosstalk and electromagnetic interference (EMI). * **High Reliability:** No external windings that can break or shift. * **Solderability:** Excellent heat resistance for wave or reflow soldering. #### Common Applications: 1. **Noise Suppression:** Used in power supply lines to filter out high-frequency noise. 2. **Signal Processing:** Found in mobile phones, computers, and peripheral devices. 3. **Resonance Circuits:** Used in oscillators and timing circuits where a small, stable inductance is required. --- ### 4. Typical Electrical Limits (Standard Range) While specific values depend on the manufacturer (like Central Technologies), typical limits for an R22M 1206 inductor include: * **Self-Resonant Frequency (SRF):** Usually around 150 MHz - 250 MHz. * **DC Resistance (DCR):** Low, typically around 0.30 - 0.50 Ohms. * **Rated Current:** Generally supports between 200mA and 400mA.