DC capacitors are essential components in electronic circuits, widely used in power supply filtering, energy storage, and signal coupling applications. These capacitors are designed to handle direct current (DC) voltages and are critical for stabilizing voltage levels, reducing ripple, and improving circuit efficiency. Common types include electrolytic capacitors (aluminum and tantalum), ceramic capacitors, and film capacitors, each offering unique characteristics such as high capacitance, low ESR, or long lifespan. In automation and industrial applications, DC capacitors are found in motor drives, inverters, and power management systems. Key products in this category may include high-voltage DC link capacitors, supercapacitors for energy storage, and compact SMD capacitors for PCB integration.