The **MLC10-R18M-RC** is a high-current, surface-mount (SMD) power inductor commonly used in DC-DC converters and high-frequency power supplies. It belongs to a class of "molded" inductors designed for stability and high power density. ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Inductance** | 0.18 µH | | **Tolerance** | ±20% (indicated by 'M') | | **DC Resistance (DCR)** | ~0.70 mΩ (Typical) | | **Saturation Current (Isat)** | ~40A - 60A (depending on manufacturer specifics) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 10mm x 10mm (approximate footprint) | | **Construction** | Shielded, Metal Composite/Molded | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying equivalent parts: * **MLC**: Refers to the series (Molded Low-profile Core). * **10**: Indicates the physical size (roughly 10x10mm). * **R18**: The inductance value. "R" acts as a decimal point, so $0.18$ microhenries ($\mu H$). * **M**: Tolerance code (M = ±20%). * **RC**: Denotes RoHS Compliance. --- ### 3. Key Electronic Features * **Low DCR:** Because the resistance is extremely low (sub-milliohm), it minimizes power loss through heat, making it highly efficient for high-current applications. * **High Saturation:** Unlike ferrite drum cores, the molded metal powder core provides a "soft saturation" characteristic. This means the inductance drops gradually rather than abruptly when the current exceeds the limit. * **Magnetic Shielding:** The molded construction naturally shields the inductor, reducing Electromagnetic Interference (EMI) with neighboring components on the PCB. * **Acoustic Quietness:** The composite material is pressed around the coil, which reduces the "buzzing" noise caused by magnetostriction in high-frequency switching. --- ### 4. Common Applications This part is typically found in: 1. **Voltage Regulator Modules (VRMs):** Powering CPUs and GPUs in servers and laptops. 2. **Point of Load (POL) Converters:** Step-down converters located near the high-speed ICs. 3. **Battery Powered Systems:** Where high efficiency and small footprint are critical. 4. **Automotive Electronics:** Infotainment and ADAS power rails (if AEC-Q200 qualified). ---