Interpreting markings on motor start capacitor

[calzap]

The capacitor is Lorenzetti brand, and a picture of the label is below.  First thing that puzzled me was the capacitance rating of 540/648uF.  Ordinarily this would indicate a two-in-one capacitor like the type used in air conditioning units ... one cap for the compressor, the other for the fan.   However, those combo caps have three terminals, one being a common.  This cap has only two terminals.  See the pic below.   So, I'm guessing the 540/680 is a  range of needed starting capacitance for which this capacitor will work.   It measures 540 uF on my meter.

Then there is the vn/vP 110/120vca designation.  I'm familiar with Vn and Vp for opamps, but not capacitors.   The vca I assumed at first was a typo for VAC.   Then I noticed the cap was made in Brazil ....  so the abbreviations could be Portuguese.  Volts in Portuguese is volts, and alternating current is corrente alternada  ... that matches vca.

What about vn and vP? First, I assume the printing device did not allow descenders, so it's vn and vp.   And  assume vn applies to 110vca and vp to 120vca.    So vn might be volts normal, and vp might be volts pico.  Anyone have a different interpretation?

Mike in California

[Benta]

The 540/648 uF rating is most likely the capacitance range, read: tolerance.
It tallies with 540 uF -0/+20%, which is a normal range for this type of capacitor.
vn I'd guess as nominal AC voltage, vp as maximum AC voltage (which is tight, not much margin there).