The capacitors in question are the CAP CER 47PF 500V C0G/NP0 1206 series. These components have a capacitance value of 47 pF with an absolute tolerance of ±2%, and they operate within a working voltage range of up to 500 volts DC. They use ceramic dielectric material classified as C0G or NP0, which is known for its stability over temperature and frequency. The case size of these capacitors corresponds to the metric designation 3216, equivalent to the more commonly referenced 1206 in the industry.