GRM155C81A105KA12D

The GRM155C81A105KA12D is a multilayer ceramic capacitor (MLCC) manufactured by Murata, one of the world's leading producers of passive electronic components. This capacitor belongs to the GRM series, which is widely recognized for reliability and performance in demanding industrial and consumer applications. Multilayer ceramic capacitors are fundamental building blocks in modern electronics, used to filter, bypass, couple, and decouple signals across virtually every type of circuit board. The GRM155 series specifically targets applications requiring compact form factors with stable electrical performance across temperature and frequency ranges. These capacitors consist of alternating layers of ceramic dielectric material and metal electrodes, allowing high capacitance values to be achieved in remarkably small packages. The "0805" designation in this part number refers to the component's physical dimensions in metric form (2.0mm × 1.25mm), making it a surface-mount device ideal for high-density PCB layouts. This size is one of the most common in modern electronics manufacturing, balancing ease of assembly with meaningful capacitance and voltage ratings. The compact footprint is particularly valued in space-constrained applications such as portable instrumentation, control modules, automotive electronics, and telecommunications equipment. Engineers typically specify Murata's GRM series capacitors when they need predictable performance, long-term availability, and quality assurance backed by a major manufacturer. Murata MLCCs are engineered to maintain stable characteristics across wide temperature ranges and different bias conditions, making them suitable for both consumer-grade and industrial applications. The series includes various dielectric materials and voltage ratings, allowing designers to select the right part for their specific circuit requirements. The "105" in the part number indicates the capacitance value using the standard three-digit code common to passive components. The "KA12D" suffix provides information about the dielectric type, tolerance, voltage rating, and packaging specifications. This standardized nomenclature helps engineers quickly identify exact specifications and find compatible alternatives if needed. Common applications for capacitors in this package include power supply filtering in microcontroller circuits, high-frequency coupling and decoupling in RF modules, timing circuits, and signal integrity applications on digital boards. The GRM155 family is frequently found in automotive control units, industrial sensors, medical devices, and communication infrastructure. When selecting this specific part, engineers appreciate Murata's extensive qualification testing, consistent manufacturing processes, and the broad ecosystem of design support resources available for their components. The combination of proven reliability, compact size, and availability across multiple sales channels makes this capacitor a trusted choice for OEM manufacturers and contract electronics assemblers worldwide.