The **CTMC1210-R015K** is a surface-mount (SMD) wire-wound chip inductor designed for high-frequency and general-purpose power filtering applications. It is typically manufactured by Central Technologies. --- ### 1. Key Technical Specifications | Parameter | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 0.015 µH (15 nH) | Measured at a specific test frequency (usually 100 MHz) | | **Tolerance** | ±10% (K) | Indicated by the 'K' suffix | | **Case Size** | 1210 (EIA) | 3.2mm x 2.5mm (Metric 3225) | | **DCR (DC Resistance)** | ~0.13 Ω (Max) | Resistance of the internal winding | | **Rated Current** | ~450 mA | Maximum current the part can handle without overheating | | **SRF (Self-Resonant Freq)** | ~2500 MHz | The point where the part stops acting as an inductor | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **CTMC**: Series identifier (usually Molded Chip Inductor). * **1210**: Physical dimensions (3.2mm length x 2.5mm width). * **R015**: Inductance value. The 'R' acts as a decimal point ($0.015 \mu H$). * **K**: Tolerance code (K = $\pm 10\%$, J = $\pm 5\%$, M = $\pm 20\%$). --- ### 3. Construction and Use Cases #### Internal Construction The device consists of a wire coil wound around a ceramic or ferrite core, encapsulated in a molded plastic body. The 1210 size provides a balance between high current capacity and a small footprint. #### Common Applications * **RF Circuits:** Used in impedance matching and high-frequency filtering. * **Power Decoupling:** Removing high-frequency noise from power supply lines (VCC). * **Signal Conditioning:** Used in telecommunications equipment and mobile devices to maintain signal integrity. --- ### 4. Sample Integration (Footprint) If you are designing a PCB for this part, use the following standard 1210 dimensions: ```markdown Dimension | Value (mm) ----------------|----------- Length (L) | 3.2 ± 0.3 Width (W) | 2.5 ± 0.2 Thickness (H) | 2.2 ± 0.2 ```