This is a CAP CER 8.6PF 50V C0G/NP0 0201, a type of ceramic capacitor with specific electrical properties. It has a capacitance value of 8.6 pF and a tolerance of ±0.5pF, operating at a voltage rating of 50V. The C0G (NP0) designation refers to the temperature coefficient class, which indicates that the capacitor's capacitance remains stable over a wide temperature range. It is available in a 0201 package size, also known as metric 0603.