The **CTMC1008F-R56K** is a surface-mount (SMD) wire-wound chip inductor commonly used in high-frequency applications. It belongs to the 1008 (2520 metric) size family. --- ### 1. Technical Specifications The part number follows a specific coding structure that defines its electrical properties: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 0.56 µH (560 nH) | Denoted by "R56" | | **Tolerance** | ±10% | Denoted by "K" | | **Package Size** | 1008 (EIA) / 2520 (Metric) | 2.5mm x 2.0mm | | **Core Material** | Ferrite | High magnetic permeability | | **Mounting Type** | SMD/SMT | Surface Mount Technology | | **Shielding** | Unshielded | Molded construction | --- ### 2. Key Electrical Characteristics In addition to its base inductance, this component has specific performance limits: * **Self-Resonant Frequency (SRF):** Typically high, allowing it to function effectively in RF circuits without becoming capacitive. * **DC Resistance (DCR):** Usually measured in Ohms ($\Omega$); lower DCR is preferred to minimize power loss and heat generation. * **Rated Current ($I_{sat}$ / $I_{rms}$):** The maximum current the inductor can handle before the inductance drops (saturation) or the temperature rises excessively. --- ### 3. Construction and Material * **Wire-Wound Design:** Uses a copper wire coiled around a ferrite core. This provides higher Q-factors (quality factor) and higher current handling compared to multilayer ceramic inductors. * **Molded Encapsulation:** The "F" in the series often indicates a molded or resin-coated finish, which provides physical protection and improved pick-and-place reliability during manufacturing. --- ### 4. Common Applications Due to its size and frequency response, the CTMC1008F-R56K is typically found in: 1. **Mobile Communications:** Filtering and matching circuits in smartphones. 2. **RF Circuits:** Used in oscillators and signal processing. 3. **DC-DC Converters:** Small-scale power management for portable electronics. 4. **Consumer Electronics:** Wearables and IoT devices where PCB space is limited.