This is a high-quality ceramic capacitor with the part number CAP CER 27PF 50V C0G/NP0 0402. It has a capacitance of 27 picofarads and can withstand voltages up to 50 volts. The C0G and NP0 designations indicate that it is a temperature-stable ceramic capacitor with near-zero change in capacitance over the operating temperature range, making it suitable for applications where stability is critical.