The specified capacitor is a 18pF, 1.5kV C0G/NP0 ceramic component in the 1206 package size. It has a tolerance of ±1% and operates within a 1500V DC working voltage rating. This capacitor belongs to the C0G (NP0) series, which is known for its stable characteristics over a wide temperature range, making it suitable for applications requiring precise capacitance value stability.