The **CTMC1008-R15M** is a surface-mount (SMD) wire-wound chip inductor designed for high-frequency and power management applications. It belongs to the 1008 series, which denotes its physical footprint. --- ## 1. Technical Specifications The part number follows a specific coding structure that defines its electrical properties: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.15 µH (150 nH) | | **Tolerance** | ±20% (indicated by 'M') | | **Case Size** | 1008 (2.5mm x 2.0mm) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Construction** | Wire-wound / Molded | --- ## 2. Part Number Breakdown Understanding the nomenclature helps in identifying equivalent parts or variations: * **CTMC**: Series prefix (typically Molded Chip Inductor). * **1008**: Dimensional size code (Length: 0.10 inches, Width: 0.08 inches). * **R15**: Resistance/Inductance value. "R" acts as a decimal point ($0.15$). * **M**: Tolerance code ($M = \pm20\%$, whereas $K = \pm10\%$). --- ## 3. Key Characteristics The CTMC series is characterized by several engineering advantages: ### A. High Q-Factor The wire-wound construction allows for a high Quality Factor (Q), which is essential for maintaining low signal loss in resonant circuits. ### B. High Current Handling Compared to multilayer ceramic inductors of the same size, wire-wound molded inductors can handle significantly higher DC currents without saturating. ### C. Magnetic Shielding The "Molded" aspect often implies that the coil is encapsulated in a resin/ferrite compound, providing better mechanical durability and moderate EMI shielding. --- ## 4. Common Applications * **DC-DC Converters:** Used in voltage regulation modules for smartphones and portable electronics. * **RF Circuits:** Matching networks and high-frequency filtering. * **Decoupling:** Filtering noise from power supply lines to prevent interference with sensitive ICs.