The part number for this ceramic capacitor is CAP CER 270PF 5KV C0G/NP0 1825. It has a capacitance of 270 pF with a tolerance of ±10% and can withstand a voltage of up to 5000V (5kV). The capacitor's type is C0G, also known as NP0 (1B), and its metric size is 1825.