CL31C121JHFNNNE

The CL31C121JHFNNNE is a multilayer ceramic capacitor (MLCC) manufactured by Samsung, designed for general-purpose energy storage and filtering applications in electronic circuits. This component belongs to the CL31 series, which represents Samsung's standard offering for cost-effective capacitive solutions in consumer and industrial electronics. Multilayer ceramic capacitors like this part are fundamental passive components used across virtually every category of modern electronics. Their primary functions include power supply filtering, signal coupling and decoupling, noise suppression, and timing circuit stabilization. The MLCC construction method—stacking multiple ceramic dielectric layers with interleaved metal electrodes—allows manufacturers to achieve significant capacitance values in extremely compact form factors, making these components ideal for space-constrained PCB designs. The CL31 series from Samsung is positioned as a workhorse component for mainstream applications rather than specialized high-performance segments. These capacitors are commonly found in consumer electronics, industrial control systems, telecommunications equipment, automotive electronics, and general-purpose computing devices. They serve equally well in power distribution networks, audio circuits, RF applications, and various sensor interfaces. The part number designation CL31C121JHFNNNE contains coded information about the component's specifications. The "C" typically indicates a specific voltage class within Samsung's CL31 lineup, while the numeric portion relates to the capacitance value. The suffix code provides details about the dielectric material, tolerance class, temperature coefficient, and packaging configuration. Samsung typically uses 0402, 0603, or 0805 case codes for components in this series, though the exact footprint should be verified against the specific part documentation. Engineers specify this exact part number when they require the precise combination of capacitance value, voltage rating, temperature stability, and physical dimensions that this designation represents. The Samsung CL31 series is known for reliable performance across commercial temperature ranges and consistent quality in high-volume manufacturing environments. Designers choose this part when cost-effectiveness, availability, and proven field performance are priorities, as Samsung's mainstream MLCC offerings have extensive historical use data across industries. For applications requiring specialized characteristics—such as extreme temperature operation, ultra-low ESR performance, or specific dielectric properties—alternative part numbers within Samsung's expanded capacitor portfolio or competitors' specialized lines may be more appropriate. However, for standard filtering, decoupling, and energy storage functions in commercial-grade electronics, the CL31C121JHFNNNE represents a trusted, readily-available solution.