The original IGCT 3BHB013088R0001 and the new IGCT 3BHE023784R0001 are fully compatible and one can be used as replacement for the other without any constrains.
The new IGCT looks visually slightly different from the original IGCT, among other it is equipped with a fiber optic output for IGCT status. The status output is not used in ACS 6000 Drives. CHIND 29.04.2013/GI