GRM155B31E104KA87D

The GRM155B31E104KA87D is a multilayer ceramic capacitor (MLCC) manufactured by Murata, one of the world's leading producers of passive electronic components. This capacitor belongs to Murata's GRM series, which represents a broad family of general-purpose ceramic capacitors widely used in consumer electronics, industrial equipment, and telecommunications applications. Multilayer ceramic capacitors are fundamental passive components found in virtually every modern electronic circuit. They serve critical functions including filtering, decoupling, coupling, and energy storage across power supplies, signal conditioning circuits, and RF applications. The GRM series is designed to provide reliable performance across a broad range of industrial and commercial applications where cost-effectiveness and consistent quality are essential requirements. The "155" in the part number indicates this capacitor uses a 0603 surface-mount package (1.6mm × 0.8mm), making it suitable for compact, high-density PCB designs typical of modern electronics. This package size represents an industry standard that balances ease of assembly with space efficiency, allowing engineers to design smaller circuit boards without requiring specialized manufacturing equipment beyond standard pick-and-place assembly processes. The "104" designation in the part number specifies the capacitance value using the three-digit capacitor code system. Capacitors in this range are commonly specified for decoupling and bypass applications where they stabilize power delivery to integrated circuits and reduce high-frequency noise on power distribution networks. This capacitance value is frequently used near microprocessor pins, digital logic circuits, and mixed-signal ICs. The "E" in the designation indicates this capacitor operates at 25V rated voltage, providing adequate margin for many industrial and consumer applications operating at standard logic levels and modest supply voltages. The "X7R" temperature characteristic (indicated by the "31" marking) means the capacitor maintains stable capacitance across a wide temperature range, which is critical for industrial equipment that must operate reliably in varying environmental conditions. Engineers typically specify Murata GRM series capacitors when they require proven reliability, consistent quality control, and broad availability through established distribution channels. Murata's manufacturing standards ensure predictable electrical performance and long-term stability, reducing design risk in mission-critical applications. The GRM155B31E104KA87D is particularly valuable in designs requiring standard performance characteristics at economical price points, making it a default choice for mainstream industrial and commercial electronics where premium specialized capacitors are unnecessary.