GRM21A5C2D120JW01D

The GRM21A5C2D120JW01D is a multilayer ceramic capacitor (MLCC) manufactured by Murata, one of the world's leading suppliers of passive electronic components. This capacitor is part of Murata's GRM series, which represents a broad family of general-purpose ceramic capacitors widely used across consumer electronics, industrial equipment, and telecommunications applications. Multilayer ceramic capacitors like this component are among the most commonly specified passive components in modern electronics due to their compact size, reliability, and cost-effectiveness. The GRM21 designation indicates this part uses a 0805 package size (in metric notation 2012), making it suitable for both through-hole and surface-mount assembly processes on standard PCBs. This mid-range package size strikes a balance between space efficiency and ease of handling in manufacturing environments. The "C2D" portion of the part number indicates this capacitor uses a Class II dielectric formulation, which is standard for general-purpose applications where moderate capacitance stability across temperature and voltage ranges is acceptable. Class II ceramics offer higher capacitance density compared to Class I alternatives, allowing designers to achieve the required capacitance value in a smaller footprint. This makes them ideal for applications where board space is at a premium but strict stability tolerances are not critical. These capacitors are commonly found in decoupling and bypassing applications, filtering circuits, timing networks, and coupling stages throughout industrial and consumer equipment. Typical use cases include power supply filtering, signal conditioning circuits, audio equipment, switching power supplies, and general-purpose analog and digital circuitry where ceramic capacitors provide cost-effective noise suppression and voltage stabilization. Engineers typically specify this exact part when they need a reliable, proven capacitor in a standard 0805 package with Murata's quality assurance backing. Murata's GRM series benefits from extensive field validation across millions of deployed devices, making it a low-risk choice for production designs. The standardized part numbering and consistent availability through distribution channels also reduce supply chain complexity compared to less common alternatives. The 0805 package size offers practical advantages during assembly and repair; it remains large enough to be hand-solderable if needed, yet small enough to enable high-density PCB layouts. This balance has made the GRM21 series a workhorse component in countless industrial and commercial equipment designs where reliability and cost control are equally important considerations.