The specified component is a CAP CER 390PF 630V C0G/NP0 1206 ceramic capacitor. It has a capacitance of 390 pF with a tolerance of ±2 and a maximum operating voltage of 630V. This type is classified as C0G, also known as NP0 (1B), and it is packaged in the metric size 3216 but commonly referred to as 1206.