1SCA022719R1810 - Switch Disconnector
400A: The maximum amount of electricity (current) the switch can handle.
4P (4-Pole): It switches four lines at once (usually three power lines and one neutral).
Switch Disconnector: A heavy-duty safety switch used to completely shut off power for maintenance or emergencies.
Base Mounting: The switch is screwed down onto the back of an electrical cabinet.
c/w Handle/Shaft: It comes "complete with" the parts you need to turn the switch from the outside of a cabinet.