The **104CDMCCDS-R30MC** is a high-performance, surface-mount (SMD) power inductor commonly manufactured by **Sumida**. It belongs to the CDMCC series, which is characterized by its metal composite core construction. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its physical and electrical characteristics: | Parameter | Specification | | :--- | :--- | | **Series** | 104CDMCCDS | | **Inductance** | 0.30 µH (R30) | | **Tolerance** | ±20% (M) | | **Core Material** | Metal Composite (Carbonyl Iron Powder) | | **DCR (Direct Current Resistance)** | Extremely low (typically < 1.5 mΩ) | | **Saturation Current ($I_{sat}$)** | High (typically 30A - 40A range) | | **Operating Temperature** | -55°C to +125°C | --- ### 2. Key Features * **Metal Composite Technology:** The inductor uses a molded metal powder core. This design allows for a "soft saturation" characteristic, meaning the inductance drops gradually as current increases rather than dropping off sharply. * **Low Magnetic Leakage:** The molded construction provides excellent magnetic shielding, reducing Electromagnetic Interference (EMI) with surrounding components. * **High Efficiency:** Due to its very low DC resistance (DCR), it minimizes power loss through heat, making it ideal for high-current power supplies. * **Compact Footprint:** The "104" designation usually refers to the approximate dimensions (approx. 10.0mm x 11.0mm). --- ### 3. Common Applications This component is designed for high-density, high-current power conversion circuits: * **DC/DC Converters:** Used as the main storage inductor in buck/boost regulators. * **CPU/GPU Power:** Voltage Regulator Modules (VRM) for high-performance computing. * **Automotive Electronics:** Infotainment systems and ADAS modules (AEC-Q200 variants often available). * **Industrial Equipment:** Compact power supplies for distributed power architectures. --- ### 4. Part Number Breakdown The code can be decoded as follows: * **104**: Size code (approx. 10mm). * **CDMCCDS**: Series name (Molded Power Inductor). * **R30**: Inductance value ($0.30 \mu H$). * **M**: Tolerance ($\pm 20\%$). * **C**: Packaging/Variation code.