The **CMLB041B-R68MS** is a high-current, low-profile power inductor typically used in DC-DC converters and voltage regulator modules. It is part of the "molded" inductor family, known for high efficiency and magnetic shielding. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the component's physical and electrical characteristics: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **CMLB** | Series Name | Cyntec Molded Inductor Series | | **041B** | Case Size | ~4.4 x 4.1 x 2.0 mm | | **R68** | Inductance Value | 0.68 µH (Microhenries) | | **M** | Tolerance | ±20% | | **S** | Standard Code | Internal manufacturing/revision code | --- ### 2. Key Technical Specifications These parameters define how the part performs under electrical load: * **Inductance:** 0.68 µH * **DC Resistance (DCR):** Typically very low (approx. 15–20 mΩ), minimizing power loss as heat. * **Saturation Current ($I_{sat}$):** The current at which inductance drops by a specific percentage (usually 30%). For this size, it is typically around **8A to 12A**. * **Rated Current ($I_{rms}$):** The continuous current that causes a specific temperature rise (usually 40°C). * **Operating Temperature:** Generally rated for **-55°C to +125°C**. --- ### 3. Construction and Features The "Molded" construction offers several advantages over traditional wire-wound inductors: #### A. Composite Iron Powder Core The coil is embedded in a metallic magnetic powder. This design allows for: * **Magnetic Shielding:** Minimizes Electromagnetic Interference (EMI) with surrounding components. * **Soft Saturation:** Unlike ferrite cores that "drop off" instantly, these maintain performance better as current increases. #### B. Low Profile The "041B" designation indicates a small footprint and height, making it ideal for thin electronic devices like smartphones, laptops, and tablets. #### C. High Efficiency The use of flat-wire or high-purity copper reduces the "Skin Effect" and DC resistance, leading to better battery life in portable devices. --- ### 4. Typical Applications The CMLB041B-R68MS is commonly found in: * **Smartphones/Tablets:** Power management for CPUs and GPUs. * **SSD Drives:** High-speed data storage power rails. * **DC-DC Converters:** Point-of-Load (POL) modules. * **Servers:** Distributed power systems requiring high density.