The part number **0412CDMCCDS-R10MC** refers to a high-current, low-profile power inductor, typically manufactured by **Sumida**. These components are widely used in DC-DC converters for laptops, graphics cards, and compact mobile devices. --- ## 1. Part Number Breakdown The alphanumeric string defines the physical and electrical characteristics of the component: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **0412** | Size Code | Approx. 4.4mm x 4.2mm x 1.2mm | | **CDMC** | Series Type | Surface Mount (SMD) Metal Compound Power Inductor | | **CDS** | Construction | Shielded construction for low EMI | | **R10** | Inductance Value | **0.10 µH** (R denotes decimal point) | | **M** | Tolerance | **±20%** | | **C** | Special Code | Typically refers to packaging or internal material revisions | --- ## 2. Technical Specifications This inductor is designed for "Point of Load" (POL) applications where high efficiency and high current handling are required in a small footprint. ### Electrical Characteristics * **Inductance:** 0.10 µH * **DC Resistance (DCR):** Extremely low (typically < 3.0 mΩ), which minimizes power loss. * **Saturation Current (Isat):** Very high. Usually rated between **15A to 25A** (depending on the specific manufacturer's batch), meaning the inductance doesn't drop sharply under heavy loads. * **Temperature Range:** -40°C to +125°C (including self-heating). ### Physical Features * **Molded Construction:** Uses a metal alloy powder core, providing excellent saturation characteristics compared to traditional ferrite cores. * **Magnetic Shielding:** Reduces electromagnetic interference (EMI) with surrounding components. * **Lead-Free/RoHS:** Compliant with modern environmental standards. --- ## 3. Typical Applications Because of the **0.10 µH** rating (very low inductance) and high current capacity, this part is found in high-frequency switching environments: 1. **Voltage Regulator Modules (VRM):** For CPU and GPU power delivery. 2. **High-speed DC-DC Converters:** Where switching frequencies are high. 3. **Battery Powered Devices:** Smartphones, tablets, and ultra-thin notebooks. 4. **SSD Power Rails:** Providing stable current to NAND and Controllers. ---