The part number **0618CDMCCDS-R68MC** refers to a high-current, shielded power inductor typically manufactured by **Sumida**. These components are designed for Surface Mount Technology (SMT) and are widely used in DC/DC converter applications. --- ### 1. Part Number Breakdown To understand the component, we can deconstruct the code based on standard manufacturer naming conventions: | Segment | Meaning | Description | | :--- | :--- | :--- | | **0618** | Size Code | Dimensions (approx. 6.0mm x 6.0mm x 1.8mm) | | **CDMC** | Series | Low-profile, high-current metal compound molding type | | **CDS** | Construction | Shielded construction with metal powder core | | **R68** | Inductance | **0.68 µH** (R denotes the decimal point) | | **M** | Tolerance | **±20%** inductance tolerance | | **C** | Packaging | Carrier Tape/Reel packaging | --- ### 2. Technical Specifications While exact values can vary slightly by manufacturer batch, the typical characteristics for a 0.68µH 0618 series inductor are: * **Inductance:** 0.68 µH * **DC Resistance (DCR):** Very low (typically in the range of 5mΩ to 10mΩ) to minimize power loss. * **Saturation Current (Isat):** The current at which inductance drops by a specific percentage (usually 30%). For this size, it is typically around **10A - 15A**. * **Temperature Rise Current (Irms):** The current that causes a 40°C rise in temperature. * **Operating Temperature:** Generally **-40°C to +125°C**. --- ### 3. Key Features and Benefits * **Metal Compound Core:** Uses iron powder or a similar composite which allows for high saturation currents and soft saturation characteristics compared to traditional ferrite cores. * **Magnetic Shielding:** The molded construction acts as a natural shield, reducing Electromagnetic Interference (EMI) with surrounding components. * **Low Profile:** The "18" in the code signifies a 1.8mm height, making it ideal for thin electronic devices like tablets and laptops. * **High Efficiency:** Low DCR ensures minimal heat generation during high-power operation. --- ### 4. Common Applications This specific inductor is found in power management circuits such as: 1. **Buck Converters:** Stepping down voltage in smartphones and laptops. 2. **GPU/CPU Power Supply:** Providing stable current to high-speed processors. 3. **SSD Drives:** Small form factor power regulation. 4. **Automotive Infotainment:** Compact power modules for in-car displays.