This is a 4.7PF 500V C0G/NP0 ceramic capacitor with a tolerance of ±0.5pF, in the 1808 package size (also known as 4520 metric). It has a capacitance value of 4.7 picofarads and operates at a voltage rating of 500 volts. The capacitor is made from C0G/NP0 material, which is known for its stability over temperature changes.