When looking up the part number MX34R32VF1 for connector header from JAE Electronics you may find the part number MX34R32VF1A.
The suffix A in MX34R32VF1A is just a modification code for the factory.
There is no difference in specifications or performance between the part number with or without the suffix “A".
Applicable Part Numbers
MX34R32VF1A-ND
670-3025-ND