The part number **0518CDMCCDS-R68MC** refers to a high-current, shielded power inductor typically manufactured by **Sumida**. These components are essential in modern power electronics for managing energy storage and filtering. --- ### 1. Part Number Breakdown To understand the component, we can deconstruct the alphanumeric code: | Segment | Meaning | Details | | :--- | :--- | :--- | | **0518** | Case Size | Approx. 5.4mm x 5.2mm with a height of 1.8mm. | | **CDMC** | Series Type | Molded Power Inductor (Metal Composite Core). | | **R68** | Inductance Value | **0.68 µH** (Microhenries). | | **M** | Tolerance | ±20% | | **C** | Packaging/Finish | Usually refers to carrier tape packaging or specific coating. | --- ### 2. Key Technical Specifications Based on the standard 0518CDMCCDS series profile, here are the typical electrical characteristics: | Parameter | Typical Value | | :--- | :--- | | **Inductance** | 0.68 µH | | **DC Resistance (DCR)** | ~10.0 mΩ (Max) | | **Saturation Current (Isat)** | ~12.0 - 14.0 A (Value where inductance drops by 30%) | | **Temperature Rise Current (Irms)** | ~8.0 - 9.0 A (Value causing a 40°C rise) | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Core Features and Construction * **Metal Powder Molding:** Unlike traditional wire-wound inductors with ferrite cores, this uses a metal composite powder. This construction allows for a "soft saturation" characteristic (the inductance doesn't drop off instantly when current increases). * **Magnetic Shielding:** The molded structure naturally shields the component, reducing Electromagnetic Interference (EMI) with surrounding components on the PCB. * **Low Profile:** The "1.8mm" height makes it ideal for thin electronic devices like laptops and smartphones. --- ### 4. Common Applications These inductors are primarily used in **DC-DC converters** and Voltage Regulator Modules (VRMs). Specific applications include: * **Consumer Electronics:** Notebooks, tablets, and gaming consoles. * **Telecommunications:** Base station power modules. * **Automotive:** Infotainment systems and LED lighting drivers. --- ### 5. Footprint (Land Pattern) Example When designing a PCB for this part, the pads usually follow this approximate geometry: ```text 5.4mm <-----------> +-----------+ ^ | [ Pad ] | | 5.2mm | | | | [ Pad ] | | +-----------+ v ```