The TA16D4L0804TPE is a Schneider Electric TransferPacT automatic transfer switch rated for 80 A continuous at 400 V AC, 50/60 Hz, with 4 poles. The PC-class design means the switch is rated for making and breaking currents but does not provide overcurrent protection — that's handled upstream. The AC-33B utilization category covers mixed motor and resistive loads, typical for building services and industrial changeover applications.
The 80 A rated operational current (Ie) matches the continuous load the switch carries in normal service; the conventional free-air thermal current (Ith) is also 80 A at 60 °C, so no derating is needed at that ambient.
The 4 push-buttons and LCD screen let an operator cycle through auto/manual modes and read status without opening the door.