The **125CDMCCDS-R68MC** is a specific part number for a high-current, low-profile power inductor typically manufactured by **Sumida**. These components are essential in modern electronics for power management and voltage regulation. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics of the component: | Segment | Meaning | Details | | :--- | :--- | :--- | | **125CDMC** | Series Family | Inductor series (Shielded, SMT, High Current) | | **DS** | Construction | Often refers to the internal structure or material type | | **R68** | Inductance Value | **0.68 µH** (R denotes the decimal point) | | **M** | Tolerance | **±20%** (Standard for power inductors) | | **C** | Packaging/Special | Often relates to Taping or specific environmental ratings | --- ### 2. Technical Specifications While exact values can vary slightly by manufacturer batch, the typical specs for a **0.68µH** 125CDMC series inductor are: * **Inductance:** 0.68 µH * **DC Resistance (DCR):** Extremely low (typically between 1.5mΩ to 3.0mΩ) to minimize power loss. * **Saturation Current (Isat):** Very high, usually ranging from **20A to 35A** depending on the specific frame size. * **Operating Temperature:** Typically -40°C to +125°C. * **Shielding:** Magnetically shielded construction to prevent Electromagnetic Interference (EMI). --- ### 3. Key Features & Materials The "CDMC" series is known for its **Metal Compound Molding** technology: 1. **Metal Powder Core:** Uses iron powder or alloy powder pressed around the coil, allowing for higher saturation currents compared to traditional ferrite cores. 2. **Surface Mount (SMD):** Designed for automated PCB assembly. 3. **Low Buzz Noise:** The molded construction reduces acoustic noise caused by magnetostriction. --- ### 4. Common Applications These inductors are primarily used in **DC-DC Converters** and **Point of Load (POL)** power supplies. You will find them in: * **Laptops/PCs:** CPU and GPU power delivery (VRM modules). * **Servers:** High-efficiency power stages. * **Automotive:** Infotainment and LED lighting drivers. * **Telecommunications:** Base station power modules. --- ### 5. Footprint Example This component is usually housed in a square or rectangular molded body. ```text Approximate Dimensions: Length: 13.0 mm Width: 12.5 mm Height: 5.4 mm (Typical for 125 series) ```