The CAP CER 1800PF 3KV X7R 2225 is a ceramic capacitor with a capacitance of 1800 picofarads. It has a tolerance of ±10% and can withstand a maximum voltage of 3000 volts. This capacitor conforms to the X7R rating, indicating it has a high dielectric constant and exhibits low loss over a wide range of frequencies. The metric size designation is 2225, which corresponds to an 1815 imperial measurement.