A 1.2 pF ±0.5 pF, 50V ceramic capacitor with a capacitance value of 1.2 pF and tolerance of ±0.5 pF, available in the 1206 package size. This component falls under the C0G/NP0 classification, offering stable properties over temperature. It is specified as a metric-sized (3216) part, denoted by the code 'C121B'.