1812AA391KAT1A

# 1812AA391KAT1A Capacitor Component Description The 1812AA391KAT1A is a capacitor manufactured by AVX, part of the company's established 1812AA series. This component is housed in a 1812 surface mount package, a standard rectangular form factor widely adopted in modern electronics manufacturing. The 1812 designation refers to imperial dimensions (0.18 inches by 0.12 inches), making it a compact choice for space-constrained circuit board layouts while remaining straightforward to assemble using standard pick-and-place equipment and reflow soldering processes. Based on the part number structure, this capacitor is designed for general-purpose applications requiring reliable performance across industrial and commercial temperature ranges. AVX's 1812AA series represents a mid-range offering within the company's capacitor portfolio, balancing cost-effectiveness with consistent electrical performance for the majority of industrial applications. Capacitors in this form factor and from this manufacturer family are commonly specified in power supply circuits, signal conditioning stages, filtering applications, and decoupling roles across industrial control systems, telecommunications equipment, and consumer electronics. The 1812 package size provides engineers with a practical middle ground—larger than 0805 or 0603 packages, allowing for better thermal dissipation and higher capacitance values in some technologies, yet smaller and more economical than larger 2220 or 2512 formats. The specific part number suffix indicates this is a standard variant within AVX's lineup, manufactured to established specifications that ensure compatibility with legacy designs and proven compatibility with common PCB assembly processes. Engineers often select components from established families and manufacturers like AVX because of the reliability record, consistent availability of production runs, and predictable behavior across manufacturing tolerances and environmental conditions. For engineers evaluating this part, key considerations typically include the operating temperature range, voltage rating, and capacitance value—all parameters determined by your specific circuit requirements. The 1812 package format offers good accessibility for inspection and rework compared to smaller packages, and the mid-range size makes this component suitable for both prototype development and high-volume production runs without requiring specialized assembly equipment. When choosing between similar capacitor options, specifying an established part number like the 1812AA391KAT1A helps ensure design consistency across production batches and simplifies supply chain management for manufacturing and maintenance operations.