This is a 150pF ceramic capacitor with the designation CER 150PF 1KV C0G/NP0 1812. It has a capacitance value of 150 pF and operates within a ±5% tolerance range, supporting voltages up to 1000V (1kV). The capacitor is made from C0G (NP0) ceramic material, housed in an 1812 package that corresponds to the metric designation 4532.