The MT18B681K500CT is a Multilayer Ceramic Capacitor (MLCC) manufactured by Walsin. It is an SMD/SMT component, meaning it has a Surface Mount Device/Surface Mount Technology. This MLCC has a capacitance of 680pF, a voltage rating of 50V, and comes in an 0603 package size as per RoHS regulations. The MT18B681K500CT is an ideal component for high frequency circuit designs, as it has low DC bias current, and low capacitance variation. It also has excellent thermal stability, making it suitable for high temperature applications.