The part number for this component is CAP CER 43PF 630V C0G/NP0 1111. It is a ceramic capacitor with a capacitance value of 43 pF and a voltage rating of 630V, classified as a C0G or NP0 type (also known as a 1B dielectric) in the 1111 package size, which is equivalent to the metric size 2828.