The **104CDMCCDS-R47MC** is a specific part number for a high-current, low-profile **SMD (Surface Mount Device) Power Inductor**, manufactured by **Sumida**. These components are critical in modern electronics for voltage regulation and noise filtering. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics of the component: | Segment | Meaning | Description | | :--- | :--- | :--- | | **104** | Case Size | Dimensions (approx. 11.0 x 10.0 mm). | | **CDMCCDS** | Series Name | Metal compound molding type (high current/low noise). | | **R47** | Inductance Value | **0.47 µH** (Microhenries). | | **M** | Tolerance | **±20%** tolerance on the inductance value. | | **C** | Packaging | Tape & Reel packaging. | --- ### 2. Key Technical Specifications While exact values can vary slightly by production batch, the standard specifications for this series are: * **Inductance:** 0.47 µH. * **DC Resistance (DCR):** Extremely low (typically < 2.0 mΩ), which minimizes power loss as heat. * **Saturation Current (Isat):** Very high (often exceeding 20A–30A), meaning the inductor maintains its property even under heavy loads. * **Construction:** Shielded construction using a metal powder molding process. --- ### 3. Core Features and Benefits 1. **Metal Powder Technology:** Unlike traditional wire-wound ferrites, these use a metal composite core. This allows for "soft saturation" characteristics, preventing a sudden drop in inductance during current spikes. 2. **Magnetic Shielding:** The molded body acts as a natural shield, significantly reducing **Electromagnetic Interference (EMI)**, which is vital for compact circuit boards. 3. **Low Profile:** The "104" series is designed to be relatively flat, making it suitable for thin devices like laptops or tablets. 4. **High Efficiency:** Due to low DCR, it is highly efficient in power conversion stages. --- ### 4. Common Applications This inductor is typically found in the **DC-DC Converter** stages of high-performance electronics: * **Graphics Cards (GPUs) & CPUs:** Used in VRM (Voltage Regulator Module) phases. * **Laptops/Servers:** High-current power supplies for processors. * **Automotive Electronics:** Infotainment systems and ADAS modules. * **Industrial Power Supplies:** Where high reliability and low noise are required. ---