The CAP CER 18PF 50V C0G/NP0 RADIAL is a type of ceramic capacitor. It has a capacitance value of 18 picofarads (pF) and can withstand a voltage of up to 50 volts. This component is classified as C0G or NP0, which indicates its temperature stability and characteristics. The "RADIAL" designation specifies the style in which it is constructed for mounting purposes.