The **252012CDMCDDS-R47MC** is a surface-mount (SMD) power inductor commonly used in DC-DC converter applications. This part number follows a specific nomenclature used by manufacturers like **Sumida** or similar power component specialists. ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the component's physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **252012** | Case Size | Dimensions: 2.5mm (L) x 2.0mm (W) x 1.2mm (H) | | **CDMCDDS** | Series Type | Molded power inductor (Metal alloy core) | | **R47** | Inductance | 0.47 µH (Microhenries) | | **M** | Tolerance | ±20% | | **C** | Packaging/Special | Specific manufacturer internal code or reel type | --- ### 2. Key Technical Specifications Based on the standard parameters for this class of molded inductor: * **Inductance:** 0.47 µH * **Construction:** Metal composite/molded type (provides high saturation current and low acoustic noise). * **Operating Temperature:** Typically -40°C to +125°C. * **Shielding:** Magnetically shielded (prevents electromagnetic interference with nearby components). * **DC Resistance (DCR):** Very low (usually in the range of 15–25 mΩ) to minimize power loss. * **Saturation Current ($I_{sat}$):** High current handling capability before inductance drops, suitable for high-frequency switching. --- ### 3. Application Areas This component is designed for compact electronic devices where space is limited but power efficiency is critical: * **Mobile Devices:** Smartphones, tablets, and wearables. * **Power Management:** DC-DC buck/boost converters. * **Computing:** Laptops and SSD power rails. * **IoT:** Low-power sensor nodes requiring efficient voltage regulation. --- ### 4. Advantages of Molded Inductors Compared to traditional wire-wound ferrite inductors, the **CDMCDDS** series offers: 1. **High Current Density:** Can handle higher peak currents in a smaller footprint. 2. **Soft Saturation:** The inductance drops gradually rather than abruptly when current increases. 3. **Low EMI:** The molded construction acts as a natural shield. ---