The part number is 1808Y0500124MDR, referring to a ceramic capacitor with the following specifications: 0.12 microfarads, ±20% tolerance, and a working voltage of 50 volts. It has an X7R dielectric rating, which is suitable for applications requiring a stable capacitance value over a range of temperatures. The capacitor is packaged in the 1808 metric case size, also known as 4520 in imperial measurements.