The CAP CER 390PF 500V X7R 1206 is a specific type of ceramic capacitor. It has a capacitance value of 390 picofarads (pF) with a tolerance of ±5, and it operates at a voltage of 500 volts. The X7R designation indicates that this capacitor belongs to the X7R group of ceramic capacitors, which have a high temperature coefficient and are often used in applications where stability is crucial. Its package size is 1206 (3216 metric), making it suitable for use in surface-mount technology (SMT) and other compact electronic devices.