P/N GC4030M6 is a 3P 40A/15A (AC1/AC3) TeSys GC contactor with 3 normally open contacts with a coil voltage of 220/240 VAC at 60Hz.
With the same rating, we do not have a 1:1 replacement. However, we can advise to use P/N GC4040M6.
It has the same specifications but it's 4P instead of 3P so it has 4 normally open contacts instead of 3 normally open contacts.
Please find the datasheet for the new reference in the link below :