DF13-4P-1.25DSA(05)Explicitly documented as a similar substitute by distributors for the obsolete DF13-4P-1.25DSA, with the (05) suffix typically indicating packaging quantity rather than a change in core specifications.
DF13-4P-1.25DSA(25)An active part number within the DF13 series with the same base specifications, where the (25) suffix indicates packaging quantity.
DF13-4P-1.25DSA(50)An active part number within the DF13 series with the same base specifications, where the (50) suffix indicates packaging quantity.
Confirm acceptability against your drawing before ordering.