This is a 0603-sized ceramic capacitor with the designation of CAP CER 4.3PF 250V C0G/NP0. It has a capacitance value of 4.3 pF and a tolerance of ±0.25pF, operating at a voltage rating of 250V. The capacitor is made from C0G/NP0 ceramic material, classified as 1B, which refers to its temperature stability characteristics.