The IC is design for DC application and can only be used as a DC circuit breaker. However, you can use it as AC circuit breaker if the AC is rectified to DC.
LT1640A
Production
The LT1640AL/LT1640AH are 8-pin, negative voltage Hot Swap™ controllers that allow a board to be safely inserted and removed from a live backplane. Inrush...
Datasheet
LT1640A on Analog.com