The 3 digit suffix at the end of the part number for Capacitors from the B4 Series is a little vague in the standard datasheet, which usually doesn’t cause concern as it isn’t related to the performance specifications for the series.
However, if there is some concern over the possible variations, this is the most common one:
B4xxxxxxxxxx000 => External insulation PVC sleeve.
B4xxxxxxxxxx600 => External insulation PET sleeve.
The “600” suffix, PET sleeve is considered the standard version, with “000” PVC sleeves considered a variant option. For the last two digits of the suffix, see page 6 of the
For more documentation, here’s another forum post that might help: