The part number is AC0603FRNPO9BN681 for a ceramic capacitor with the following specifications: CAP CER 680PF 50V C0G/NP0 0603. This capacitor has a capacitance value of 680 pF and operates within a voltage range of ±50V. It is designed in a 0603 (1608 Metric) package, featuring C0G (NP0) dielectric characteristics.