The specification is for a ceramic capacitor with the part number CAP CER 120PF 1.5KV C0G/NP0 1808. It has a capacitance of 120 pF and operates at ±1500V (1.5kV). The component adheres to the C0G/NP0 temperature coefficient, which is characterized by a low loss factor and stable capacitance over a wide range of temperatures. The capacitor comes in an 1808 package, also known as a 4520 metric size.