The specified component is a CAP CER 18PF 63V C0G/NP0 0603. It has an 18-pF capacitance with ±1 tolerance and operates at up to 63V. The capacitor is in the form of a ceramic element classified as C0G, also known as NP0 (1B). Its dimensions are those of a 0603 or 1608 metric size.