The AC-1 rating covers resistive circuits, heating, and lighting where the switching arc is easier to extinguish. The 2 NO pole arrangement is common for switching single-phase or DC loads, or for breaking both lines on a three-phase motor with a separate overload relay on the third phase.
Control circuit and auxiliary contacts
The coil pulls in at 220 V AC 50 Hz — a standard panel voltage in many regions. The contactor carries one normally open and one normally closed auxiliary contact built in, so you can wire a seal-in or status feedback without adding a separate auxiliary block.