The **CTML0805F-R68M** is a surface-mount multilayer chip inductor designed for high-frequency and general-purpose filtering applications. It is manufactured by Central Technologies. --- ### 1. Key Technical Specifications | Parameter | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 0.68 µH | Rated at specified frequency | | **Tolerance** | ±20% | Indicated by the suffix "M" | | **Package Size** | 0805 (EIA) | 2.0mm x 1.25mm | | **Material** | Ferrite | Multilayer construction | | **DC Resistance (Max)** | 0.45 Ω | Resistance at zero frequency | | **Rated Current (Max)** | 150 mA | Maximum current before overheating | | **Self-Resonant Freq.** | 80 MHz | Minimum SRF | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the component's characteristics: * **CTML**: Product series (Central Technologies Multilayer Inductor). * **0805**: Physical dimensions (0.08 x 0.05 inches). * **F**: Lead-free / RoHS compliant. * **R68**: Inductance value (R represents the decimal point = 0.68 µH). * **M**: Tolerance code (M = ±20%). --- ### 3. Construction and Features * **Multilayer Structure:** Unlike wire-wound inductors, these are built by layering ferrite paste and conductive traces, resulting in a monolithic, shielded structure. * **Magnetic Shielding:** The closed magnetic circuit minimizes EMI (Electromagnetic Interference) and prevents crosstalk with neighboring components on the PCB. * **Excellent Solderability:** Usually features nickel barrier terminations with a tin plating to prevent leaching during reflow soldering. --- ### 4. Common Applications Due to its small footprint and ferrite core, this inductor is typically used for: 1. **Noise Suppression:** Filtering high-frequency noise in power supply lines. 2. **Signal Conditioning:** Used in low-frequency communication circuits. 3. **Consumer Electronics:** Found in smartphones, tablets, and portable devices where space is at a premium. 4. **DC-DC Converters:** Small-scale voltage regulation modules. ---