The CAP CER 1800PF 250VAC C0G 1812 is a type of ceramic capacitor. It has a capacitance value of 1800 pF and can withstand voltages up to 250VAC. This component belongs to the C0G or NP0 class, which indicates it has a low temperature coefficient and stable capacitance over time. The 1812 designation refers to its metric package size, specifically a 4.3 x 3.2 mm rectangular shape.