This is a 150 pF ceramic capacitor with the designation CER 150PF 1.2KV C0G/NP0 1206. It has a capacitance value of 150 picofarads with a tolerance of ±2% and a voltage rating of 1200V (1.2kV). The capacitor is made from C0G material, also known as NP0, and has a metric size of 3216.