May you wanted something like this:

use warnings;
use strict;

while ( defined( my $filename = <DATA> ) ) {
    chomp $filename;
    if ( my ( $product, $year, $month, $day, $hour, $suffix, $ver ) =
        $filename =~ m/^(.+?)\.(\d{4})(\d{2})(\d{2})(\d{2})\.(.+?)\.(.
++?)\./ )
    {
        print join ' ', ( $product, $year, $month, $day, $hour, $suffi
+x, $ver ),
          $/;
    }
}

__DATA__
3B40RT.2000033121.7.bin.gz
3B40RT.2000033121.7R.bin.gz
3B40RT.2000033121.7RWER.bin.gz
[download]

...
if (
        my ( $product, $year, $month, $day, $hour, $suffix, $ver ) =
        $filename =~ m/^(.+?) # matches PRODUCT
                       \.
                        (\d{4}) # matches YEAR
                        (\d{2}) # matches MONTH
                        (\d{2}) # matches DAY
                        (\d{2}) # matches HOUR
                      \.
                        (.+?)   # SUFFIX matches both 7,7R or 7anythin
+g
                      \.
                        (.+?)   # VERSION 
                      \./x
      )
    {
        print join ' ', ( $product, $year, $month, $day, $hour, $suffi
+x, $ver ),
          $/;
    }
...
[download]