The **CTHCCI1090F-R56M** is a high-current, shielded surface-mount (SMD) power inductor. This component is part of a specialized series designed for high-density power applications, such as DC-DC converters and voltage regulator modules (VRMs). --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify its technical boundaries: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **CTHCCI** | Series Name | High Current Composite Inductor series. | | **1090** | Case Size | Dimensions (approx. 11.0mm x 10.0mm). | | **F** | Lead-Free | Compliant with RoHS standards. | | **R56** | Inductance Value | **0.56 µH** (Microhenries). | | **M** | Tolerance | **±20%** tolerance on the inductance value. | --- ### 2. Core Technical Specifications These parts are engineered for high efficiency and low energy loss. * **Inductance:** 0.56 µH. * **DC Resistance (DCR):** Extremely low (typically in the milliohm range), which minimizes heat generation during operation. * **Saturation Current ($I_{sat}$):** High capacity (often exceeding 20A-40A depending on the specific sub-type), meaning the inductor maintains its properties even under heavy loads. * **Operating Temperature:** Generally rated from **-40°C to +125°C**, making it suitable for industrial and automotive environments. --- ### 3. Key Physical Features 1. **Molded Construction:** The coil is embedded in a metallic powder composite. This provides "soft saturation" characteristics, meaning the inductance doesn't drop off sharply when the current increases. 2. **Magnetic Shielding:** The design naturally shields electromagnetic interference (EMI), preventing the inductor from interfering with nearby sensitive components on the PCB. 3. **Small Footprint:** Despite its high current handling, the "1090" size is optimized for compact boards. --- ### 4. Common Applications Due to its low inductance (0.56 µH) and high current capability, it is primarily used in high-frequency switching environments: * **GPU/CPU Power Supplies:** Used in "Multi-phase" buck converters for high-performance computing. * **DC-DC Converters:** Point-of-Load (POL) modules for telecommunications. * **Battery Powered Systems:** Where high efficiency is required to extend battery life. ---