The part number MSASQ45MSB5334MTNA01 refers to a CAP CER 0.33UF 250V X5R 1812 ceramic capacitor, which has a capacitance value of 0.33 microfarads (µF), a voltage rating of 250 volts, and is classified as an X5R type, indicating its temperature stability and insulation properties. This component measures in metric size 4532, equivalent to the imperial size 1812.