The **0518CDMCCDS-R56MC** is a high-performance, surface-mount (SMD) power inductor. This component is typically manufactured by **Sumida** (as indicated by the "CDMC" series prefix) and is designed for high-current applications where space and efficiency are critical. --- ### 1. Technical Specification Breakdown The part number follows a specific nomenclature that describes its physical and electrical characteristics: | Part Segment | Description | Value/Detail | | :--- | :--- | :--- | | **0518** | Case Size | Approx. 5.4mm x 5.2mm x 1.8mm | | **CDMC** | Series Code | Shielded, metal composite core construction | | **R56** | Inductance Value | **0.56 µH** (R denotes decimal point) | | **M** | Tolerance | **±20%** | | **C** | Application | Standard Commercial/Industrial grade | --- ### 2. Key Electrical Characteristics While exact ratings can vary slightly between production batches, the standard specifications for a 0.56µH inductor in this frame size are generally: * **Inductance:** 0.56 µH. * **DC Resistance (DCR):** Low (typically between 5mΩ to 10mΩ) to minimize power loss. * **Saturation Current ($I_{sat}$):** High capacity (often 10A–15A range), meaning the inductance won't drop sharply under heavy load. * **Temperature Rise Current ($I_{rms}$):** The current that causes a 40°C rise in temperature. --- ### 3. Construction and Features * **Metal Composite Core:** Unlike traditional ferrite inductors, these use a powdered iron/metal composite. This allows for a **"soft saturation"** characteristic, meaning the inductor maintains its properties better as current increases. * **Magnetic Shielding:** The molded construction naturally shields the component, reducing Electromagnetic Interference (EMI) with neighboring components on the PCB. * **Low Profile:** The "18" in the name indicates a height of roughly 1.8mm, making it suitable for thin devices like laptops or tablets. --- ### 4. Common Applications This part is commonly used in DC-DC converter circuits for power management: * **Voltage Regulator Modules (VRMs):** For CPUs and GPUs. * **Point of Load (POL) Converters:** Converting a main bus voltage down to lower voltages for logic gates. * **Mobile Electronics:** Smartphones, tablets, and ultra-portable laptops. ---