The part number is CAP CER 15PF 50V C0G/NP0 0603. This refers to a ceramic capacitor with specific characteristics: it has a capacitance value of 15 picofarads, operates within a ±1 tolerance, and can handle voltages up to 50 volts. The capacitor is classified as C0G/NP0, indicating its type according to the IEC standard. Its dimensions are specified in both metric (0603) and imperial (1608) units.