The part number for this capacitor is CAP CER 270PF 2KV C0G/NP0 1808. It has a capacitance value of 270 pF with ±1% tolerance and can withstand voltages up to 2000V (2kV). This is a ceramic capacitor with the designations C0G and NP0, which indicates its characteristics and temperature stability. The dimensions are specified as 1808, which corresponds to a metric size of 4520.